Add new empty array constants for number objects
Declare variables as final Fix null behaviour to be null tolerant Javadoc null behaviour Fix formatting git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/lang/trunk@137380 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Stephen Colebourne
parent
2d06a7ce86
commit
2878a430c1
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@ -69,7 +69,7 @@ import org.apache.commons.lang.builder.ToStringStyle;
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* @author <a href="mailto:fredrik@westermarck.com">Fredrik Westermarck</a>
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* @author Nikolay Metchev
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* @since 2.0
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* @version $Id: ArrayUtils.java,v 1.13 2003/06/20 08:03:51 scolebourne Exp $
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* @version $Id: ArrayUtils.java,v 1.14 2003/06/25 23:32:08 scolebourne Exp $
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*/
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public class ArrayUtils {
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@ -81,19 +81,37 @@ public class ArrayUtils {
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public static final String[] EMPTY_STRING_ARRAY = new String[0];
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/** An empty immutable long array */
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public static final long[] EMPTY_LONG_ARRAY = new long[0];
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/** An empty immutable Long array */
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public static final Long[] EMPTY_LONG_OBJECT_ARRAY = new Long[0];
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/** An empty immutable int array */
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public static final int[] EMPTY_INT_ARRAY = new int[0];
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/** An empty immutable Integer array */
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public static final Integer[] EMPTY_INTEGER_OBJECT_ARRAY = new Integer[0];
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/** An empty immutable short array */
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public static final short[] EMPTY_SHORT_ARRAY = new short[0];
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/** An empty immutable Short array */
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public static final Short[] EMPTY_SHORT_OBJECT_ARRAY = new Short[0];
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/** An empty immutable byte array */
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public static final byte[] EMPTY_BYTE_ARRAY = new byte[0];
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/** An empty immutable Byte array */
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public static final Byte[] EMPTY_BYTE_OBJECT_ARRAY = new Byte[0];
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/** An empty immutable double array */
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public static final double[] EMPTY_DOUBLE_ARRAY = new double[0];
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/** An empty immutable Double array */
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public static final Double[] EMPTY_DOUBLE_OBJECT_ARRAY = new Double[0];
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/** An empty immutable float array */
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public static final float[] EMPTY_FLOAT_ARRAY = new float[0];
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/** An empty immutable Float array */
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public static final Float[] EMPTY_FLOAT_OBJECT_ARRAY = new Float[0];
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/** An empty immutable boolean array */
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public static final boolean[] EMPTY_BOOLEAN_ARRAY = new boolean[0];
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/** An empty immutable Boolean array */
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public static final Boolean[] EMPTY_BOOLEAN_OBJECT_ARRAY = new Boolean[0];
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/** An empty immutable char array */
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public static final char[] EMPTY_CHAR_ARRAY = new char[0];
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/** An empty immutable Character array */
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public static final Character[] EMPTY_CHARACTER_OBJECT_ARRAY = new Character[0];
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/**
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* <p>ArrayUtils instances should NOT be constructed in standard programming.
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* Instead, the class should be used as <code>ArrayUtils.clone(new int[] {2})</code>.</p>
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@ -103,10 +121,9 @@ public class ArrayUtils {
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*/
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public ArrayUtils() {
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}
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// Basic methods handling multi-dimensional arrays
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//-----------------------------------------------------------------------
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/**
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* <p>Outputs an array as a String, treating <code>null</code> as an empty array.</p>
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*
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@ -118,10 +135,10 @@ public class ArrayUtils {
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* @param array the array to get a toString for, may be <code>null</code>
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* @return a String representation of the array, '{}' if <code>null</code> passed in
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*/
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public static String toString(Object array) {
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public static String toString(final Object array) {
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return toString(array, "{}");
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}
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/**
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* <p>Outputs an array as a String handling <code>null</code>s.</p>
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*
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@ -134,13 +151,13 @@ public class ArrayUtils {
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* @param stringIfNull the String to return if the array is <code>null</code>
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* @return a String representation of the array
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*/
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public static String toString(Object array, String stringIfNull) {
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public static String toString(final Object array, final String stringIfNull) {
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if (array == null) {
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return stringIfNull;
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}
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return new ToStringBuilder(array, ToStringStyle.SIMPLE_STYLE).append(array).toString();
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}
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/**
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* <p>Get a hashCode for an array handling multi-dimensional arrays correctly.</p>
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*
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@ -149,10 +166,10 @@ public class ArrayUtils {
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* @param array the array to get a hashCode for, may be <code>null</code>
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* @return a hashCode for the array
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*/
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public static int hashCode(Object array) {
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public static int hashCode(final Object array) {
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return new HashCodeBuilder().append(array).toHashCode();
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}
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/**
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* <p>Compares two arrays, using equals(), handling multi-dimensional arrays
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* correctly.</p>
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@ -163,12 +180,11 @@ public class ArrayUtils {
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* @param array2 the array to get a hashCode for, may be <code>null</code>
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* @return <code>true</code> if the arrays are equal
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*/
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public static boolean isEquals(Object array1, Object array2) {
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public static boolean isEquals(final Object array1, final Object array2) {
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return new EqualsBuilder().append(array1, array2).isEquals();
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}
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//-----------------------------------------------------------------------
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/**
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* <p>Converts the given array into a {@link java.util.Map}. Each element of the array
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* must be either a {@link java.util.Map.Entry} or an Array, containing at least two
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@ -183,21 +199,22 @@ public class ArrayUtils {
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* {"GREEN", "#00FF00"},
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* {"BLUE", "#0000FF"}});
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* </pre>
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*
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* <p>This method returns <code>null</code> if <code>null</code> input.</p>
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*
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* @param array an array whose elements are either a {@link java.util.Map.Entry} or
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* an Array containing at least two elements
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* an Array containing at least two elements, may be <code>null</code>
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* @return a <code>Map</code> that was created from the array
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* @throws IllegalArgumentException if the array is <code>null</code>
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* @throws IllegalArgumentException if one element of this Array is
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* itself an Array containing less then two elements
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* @throws IllegalArgumentException if the array contains elements other
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* than {@link java.util.Map.Entry} and an Array
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*/
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public static Map toMap(Object[] array) {
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public static Map toMap(final Object[] array) {
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if (array == null) {
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throw new IllegalArgumentException("The array must not be null");
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return null;
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}
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Map map = new HashMap((int) (array.length * 1.5));
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final Map map = new HashMap((int) (array.length * 1.5));
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for (int i = 0; i < array.length; i++) {
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Object object = array[i];
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if (object instanceof Map.Entry) {
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@ -219,9 +236,8 @@ public class ArrayUtils {
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}
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return map;
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}
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//-----------------------------------------------------------------------
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//-----------------------------------------------------------------------
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/**
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* <p>Shallow clones an array returning a typecast result and handling
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* <code>null</code>.</p>
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@ -229,39 +245,41 @@ public class ArrayUtils {
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* <p>The objecs in the array are not cloned, thus there is no special
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* handling for multi-dimensional arrays.</p>
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*
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* <p>This method returns <code>null</code> if <code>null</code> input.</p>
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*
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* @param array the array to shallow clone, may be <code>null</code>
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* @return the cloned array, or <code>null</code> if <code>null</code>
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* passed in
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*/
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public static Object[] clone(Object[] array) {
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public static Object[] clone(final Object[] array) {
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if (array == null) {
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return null;
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}
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return (Object[]) array.clone();
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}
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/**
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* <p>Clones an array returning a typecast result and handling
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* <code>null</code>.</p>
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*
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* <p>Any multi-dimensional aspects of the arrays are ignored.</p>
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* <p>This method returns <code>null</code> if <code>null</code> input.</p>
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*
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* @param array the array to clone, may be <code>null</code>
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* @return the cloned array, or <code>null</code> if <code>null</code>
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* passed in
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*/
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public static long[] clone(long[] array) {
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public static long[] clone(final long[] array) {
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if (array == null) {
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return null;
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}
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return (long[]) array.clone();
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}
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/**
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* <p>Clones an array returning a typecast result and handling
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* <code>null</code>.</p>
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*
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* <p>Any multi-dimensional aspects of the arrays are ignored.</p>
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* <p>This method returns <code>null</code> if <code>null</code> input.</p>
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*
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* @param array the array to clone, may be <code>null</code>
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* @return the cloned array, or <code>null</code> if <code>null</code>
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@ -273,103 +291,103 @@ public class ArrayUtils {
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}
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return (int[]) array.clone();
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}
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/**
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* <p>Clones an array returning a typecast result and handling
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* <code>null</code>.</p>
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*
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* <p>Any multi-dimensional aspects of the arrays are ignored.</p>
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* <p>This method returns <code>null</code> if <code>null</code> input.</p>
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*
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* @param array the array to clone, may be <code>null</code>
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* @return the cloned array, or <code>null</code> if <code>null</code>
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* passed in
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*/
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public static short[] clone(short[] array) {
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public static short[] clone(final short[] array) {
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if (array == null) {
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return null;
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}
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return (short[]) array.clone();
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}
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/**
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* <p>Clones an array returning a typecast result and handling
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* <code>null</code>.</p>
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*
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* <p>Any multi-dimensional aspects of the arrays are ignored.</p>
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* <p>This method returns <code>null</code> if <code>null</code> input.</p>
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*
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* @param array the array to clone, may be <code>null</code>
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* @return the cloned array, or <code>null</code> if <code>null</code>
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* passed in
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*/
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public static char[] clone(char[] array) {
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public static char[] clone(final char[] array) {
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if (array == null) {
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return null;
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}
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return (char[]) array.clone();
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}
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/**
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* <p>Clones an array returning a typecast result and handling
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* <code>null</code>.</p>
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*
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* <p>Any multi-dimensional aspects of the arrays are ignored.</p>
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* <p>This method returns <code>null</code> if <code>null</code> input.</p>
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*
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* @param array the array to clone, may be <code>null</code>
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* @return the cloned array, or <code>null</code> if <code>null</code>
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* passed in
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*/
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public static byte[] clone(byte[] array) {
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public static byte[] clone(final byte[] array) {
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if (array == null) {
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return null;
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}
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return (byte[]) array.clone();
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}
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/**
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* <p>Clones an array returning a typecast result and handling
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* <code>null</code>.</p>
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*
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* <p>Any multi-dimensional aspects of the arrays are ignored.</p>
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* <p>This method returns <code>null</code> if <code>null</code> input.</p>
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*
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* @param array the array to clone, may be <code>null</code>
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* @return the cloned array, or <code>null</code> if <code>null</code>
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* passed in
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*/
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public static double[] clone(double[] array) {
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public static double[] clone(final double[] array) {
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if (array == null) {
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return null;
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}
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return (double[]) array.clone();
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}
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/**
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* <p>Clones an array returning a typecast result and handling
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* <code>null</code>.</p>
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*
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* <p>Any multi-dimensional aspects of the arrays are ignored.</p>
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* <p>This method returns <code>null</code> if <code>null</code> input.</p>
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*
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* @param array the array to clone, may be <code>null</code>
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* @return the cloned array, or <code>null</code> if <code>null</code>
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* passed in
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*/
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public static float[] clone(float[] array) {
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public static float[] clone(final float[] array) {
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if (array == null) {
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return null;
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}
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return (float[]) array.clone();
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}
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/**
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* <p>Clones an array returning a typecast result and handling
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* <code>null</code>.</p>
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*
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* <p>Any multi-dimensional aspects of the arrays are ignored.</p>
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* <p>This method returns <code>null</code> if <code>null</code> input.</p>
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*
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* @param array the array to clone, may be <code>null</code>
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* @return the cloned array, or <code>null</code> if <code>null</code>
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* passed in
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*/
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public static boolean[] clone(boolean[] array) {
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public static boolean[] clone(final boolean[] array) {
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if (array == null) {
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return null;
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}
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@ -377,7 +395,6 @@ public class ArrayUtils {
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}
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//-----------------------------------------------------------------------
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/**
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* <p>Checks whether two arrays are the same length, treating
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* <code>null</code> arrays as length <code>0</code>.
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@ -389,7 +406,7 @@ public class ArrayUtils {
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* @return <code>true</code> if length of arrays matches, treating
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* <code>null</code> as an empty array
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*/
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public static boolean isSameLength(Object[] array1, Object[] array2) {
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public static boolean isSameLength(final Object[] array1, final Object[] array2) {
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if ((array1 == null && array2 != null && array2.length > 0) ||
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(array2 == null && array1 != null && array1.length > 0) ||
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(array1 != null && array2 != null && array1.length != array2.length)) {
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@ -397,19 +414,17 @@ public class ArrayUtils {
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}
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return true;
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}
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/**
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* <p>Checks whether two arrays are the same length, treating
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* <code>null</code> arrays as length <code>0</code>.</p>
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*
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* <p>Any multi-dimensional aspects of the arrays are ignored.</p>
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*
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* @param array1 the first array, may be <code>null</code>
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* @param array2 the second array, may be <code>null</code>
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* @return <code>true</code> if length of arrays matches, treating
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* <code>null</code> as an empty array
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*/
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public static boolean isSameLength(long[] array1, long[] array2) {
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public static boolean isSameLength(final long[] array1, final long[] array2) {
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if ((array1 == null && array2 != null && array2.length > 0) ||
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(array2 == null && array1 != null && array1.length > 0) ||
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(array1 != null && array2 != null && array1.length != array2.length)) {
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@ -417,19 +432,17 @@ public class ArrayUtils {
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}
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return true;
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}
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/**
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* <p>Checks whether two arrays are the same length, treating
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* <code>null</code> arrays as length <code>0</code>.</p>
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*
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* <p>Any multi-dimensional aspects of the arrays are ignored.</p>
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*
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* @param array1 the first array, may be <code>null</code>
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* @param array2 the second array, may be <code>null</code>
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* @return <code>true</code> if length of arrays matches, treating
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* <code>null</code> as an empty array
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*/
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public static boolean isSameLength(int[] array1, int[] array2) {
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public static boolean isSameLength(final int[] array1, final int[] array2) {
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if ((array1 == null && array2 != null && array2.length > 0) ||
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(array2 == null && array1 != null && array1.length > 0) ||
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(array1 != null && array2 != null && array1.length != array2.length)) {
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@ -437,19 +450,17 @@ public class ArrayUtils {
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}
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return true;
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}
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/**
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* <p>Checks whether two arrays are the same length, treating
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* <code>null</code> arrays as length <code>0</code>.</p>
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*
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* <p>Any multi-dimensional aspects of the arrays are ignored.</p>
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*
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* @param array1 the first array, may be <code>null</code>
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* @param array2 the second array, may be <code>null</code>
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* @return <code>true</code> if length of arrays matches, treating
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* <code>null</code> as an empty array
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*/
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public static boolean isSameLength(short[] array1, short[] array2) {
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public static boolean isSameLength(final short[] array1, final short[] array2) {
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if ((array1 == null && array2 != null && array2.length > 0) ||
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(array2 == null && array1 != null && array1.length > 0) ||
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(array1 != null && array2 != null && array1.length != array2.length)) {
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@ -457,19 +468,17 @@ public class ArrayUtils {
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}
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return true;
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}
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/**
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* <p>Checks whether two arrays are the same length, treating
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* <code>null</code> arrays as length <code>0</code>.</p>
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*
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* <p>Any multi-dimensional aspects of the arrays are ignored.</p>
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*
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* @param array1 the first array, may be <code>null</code>
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* @param array2 the second array, may be <code>null</code>
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* @return <code>true</code> if length of arrays matches, treating
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* <code>null</code> as an empty array
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*/
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public static boolean isSameLength(char[] array1, char[] array2) {
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public static boolean isSameLength(final char[] array1, final char[] array2) {
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if ((array1 == null && array2 != null && array2.length > 0) ||
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(array2 == null && array1 != null && array1.length > 0) ||
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(array1 != null && array2 != null && array1.length != array2.length)) {
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|
|
@ -477,19 +486,17 @@ public class ArrayUtils {
|
|||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* <p>Checks whether two arrays are the same length, treating
|
||||
* <code>null</code> arrays as length <code>0</code>.</p>
|
||||
*
|
||||
* <p>Any multi-dimensional aspects of the arrays are ignored.</p>
|
||||
*
|
||||
* @param array1 the first array, may be <code>null</code>
|
||||
* @param array2 the second array, may be <code>null</code>
|
||||
* @return <code>true</code> if length of arrays matches, treating
|
||||
* <code>null</code> as an empty array
|
||||
*/
|
||||
public static boolean isSameLength(byte[] array1, byte[] array2) {
|
||||
public static boolean isSameLength(final byte[] array1, final byte[] array2) {
|
||||
if ((array1 == null && array2 != null && array2.length > 0) ||
|
||||
(array2 == null && array1 != null && array1.length > 0) ||
|
||||
(array1 != null && array2 != null && array1.length != array2.length)) {
|
||||
|
|
@ -497,19 +504,17 @@ public class ArrayUtils {
|
|||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* <p>Checks whether two arrays are the same length, treating
|
||||
* <code>null</code> arrays as length <code>0</code>.</p>
|
||||
*
|
||||
* <p>Any multi-dimensional aspects of the arrays are ignored.</p>
|
||||
*
|
||||
* @param array1 the first array, may be <code>null</code>
|
||||
* @param array2 the second array, may be <code>null</code>
|
||||
* @return <code>true</code> if length of arrays matches, treating
|
||||
* <code>null</code> as an empty array
|
||||
*/
|
||||
public static boolean isSameLength(double[] array1, double[] array2) {
|
||||
public static boolean isSameLength(final double[] array1, final double[] array2) {
|
||||
if ((array1 == null && array2 != null && array2.length > 0) ||
|
||||
(array2 == null && array1 != null && array1.length > 0) ||
|
||||
(array1 != null && array2 != null && array1.length != array2.length)) {
|
||||
|
|
@ -517,19 +522,17 @@ public class ArrayUtils {
|
|||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* <p>Checks whether two arrays are the same length, treating
|
||||
* <code>null</code> arrays as length <code>0</code>.</p>
|
||||
*
|
||||
* <p>Any multi-dimensional aspects of the arrays are ignored</p>.
|
||||
*
|
||||
* @param array1 the first array, may be <code>null</code>
|
||||
* @param array2 the second array, may be <code>null</code>
|
||||
* @return <code>true</code> if length of arrays matches, treating
|
||||
* <code>null</code> as an empty array
|
||||
*/
|
||||
public static boolean isSameLength(float[] array1, float[] array2) {
|
||||
public static boolean isSameLength(final float[] array1, final float[] array2) {
|
||||
if ((array1 == null && array2 != null && array2.length > 0) ||
|
||||
(array2 == null && array1 != null && array1.length > 0) ||
|
||||
(array1 != null && array2 != null && array1.length != array2.length)) {
|
||||
|
|
@ -537,19 +540,17 @@ public class ArrayUtils {
|
|||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* <p>Checks whether two arrays are the same length, treating
|
||||
* <code>null</code> arrays as length <code>0</code>.</p>
|
||||
*
|
||||
* <p>Any multi-dimensional aspects of the arrays are ignored.</p>
|
||||
*
|
||||
* @param array1 the first array, may be <code>null</code>
|
||||
* @param array2 the second array, may be <code>null</code>
|
||||
* @return <code>true</code> if length of arrays matches, treating
|
||||
* <code>null</code> as an empty array
|
||||
*/
|
||||
public static boolean isSameLength(boolean[] array1, boolean[] array2) {
|
||||
public static boolean isSameLength(final boolean[] array1, final boolean[] array2) {
|
||||
if ((array1 == null && array2 != null && array2.length > 0) ||
|
||||
(array2 == null && array1 != null && array1.length > 0) ||
|
||||
(array1 != null && array2 != null && array1.length != array2.length)) {
|
||||
|
|
@ -557,37 +558,34 @@ public class ArrayUtils {
|
|||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* <p>Checks whether two arrays are the same type taking into account
|
||||
* multi-dimensional arrays.</p>
|
||||
*
|
||||
* <p>Primitive arrays may be compared using this method too.</p>
|
||||
*
|
||||
* @param array1 the first array, must not be <code>null</code>
|
||||
* @param array2 the second array, must not be <code>null</code>
|
||||
* @return <code>true</code> if type of arrays matches
|
||||
* @throws IllegalArgumentException if either array is <code>null</code>
|
||||
*/
|
||||
public static boolean isSameType(Object array1, Object array2) {
|
||||
public static boolean isSameType(final Object array1, final Object array2) {
|
||||
if (array1 == null || array2 == null) {
|
||||
throw new IllegalArgumentException("The array must not be null");
|
||||
throw new NullArgumentException("Array");
|
||||
}
|
||||
return array1.getClass().getName().equals(array2.getClass().getName());
|
||||
}
|
||||
|
||||
|
||||
//-----------------------------------------------------------------------
|
||||
|
||||
/**
|
||||
* Reverses the order of the given array.
|
||||
* <p>
|
||||
* There is no special handling for multi-dimensional arrays.
|
||||
* <p>
|
||||
* The method does nothing if <code>null</code> is passed in.
|
||||
* <p>Reverses the order of the given array.</p>
|
||||
*
|
||||
* <p>There is no special handling for multi-dimensional arrays.</p>
|
||||
*
|
||||
* <p>This method returns <code>null</code> if <code>null</code> input.</p>
|
||||
*
|
||||
* @param array the array to reverse, may be <code>null</code>
|
||||
*/
|
||||
public static void reverse(Object[] array) {
|
||||
public static void reverse(final Object[] array) {
|
||||
if (array == null) {
|
||||
return;
|
||||
}
|
||||
|
|
@ -604,13 +602,13 @@ public class ArrayUtils {
|
|||
}
|
||||
|
||||
/**
|
||||
* Reverses the order of the given array.
|
||||
* <p>
|
||||
* The method does nothing if <code>null</code> is passed in.
|
||||
* <p>Reverses the order of the given array.</p>
|
||||
*
|
||||
* <p>This method returns <code>null</code> if <code>null</code> input.</p>
|
||||
*
|
||||
* @param array the array to reverse, may be <code>null</code>
|
||||
*/
|
||||
public static void reverse(long[] array) {
|
||||
public static void reverse(final long[] array) {
|
||||
if (array == null) {
|
||||
return;
|
||||
}
|
||||
|
|
@ -627,13 +625,13 @@ public class ArrayUtils {
|
|||
}
|
||||
|
||||
/**
|
||||
* Reverses the order of the given array.
|
||||
* <p>
|
||||
* The method does nothing if <code>null</code> is passed in.
|
||||
* <p>Reverses the order of the given array.</p>
|
||||
*
|
||||
* <p>This method returns <code>null</code> if <code>null</code> input.</p>
|
||||
*
|
||||
* @param array the array to reverse, may be <code>null</code>
|
||||
*/
|
||||
public static void reverse(int[] array) {
|
||||
public static void reverse(final int[] array) {
|
||||
if (array == null) {
|
||||
return;
|
||||
}
|
||||
|
|
@ -650,13 +648,13 @@ public class ArrayUtils {
|
|||
}
|
||||
|
||||
/**
|
||||
* Reverses the order of the given array.
|
||||
* <p>
|
||||
* There is no special handling for multi-dimensional arrays.
|
||||
* <p>Reverses the order of the given array.</p>
|
||||
*
|
||||
* <p>This method returns <code>null</code> if <code>null</code> input.</p>
|
||||
*
|
||||
* @param array the array to reverse, may be <code>null</code>
|
||||
*/
|
||||
public static void reverse(short[] array) {
|
||||
public static void reverse(final short[] array) {
|
||||
if (array == null) {
|
||||
return;
|
||||
}
|
||||
|
|
@ -673,13 +671,13 @@ public class ArrayUtils {
|
|||
}
|
||||
|
||||
/**
|
||||
* Reverses the order of the given array.
|
||||
* <p>
|
||||
* The method does nothing if <code>null</code> is passed in.
|
||||
* <p>Reverses the order of the given array.</p>
|
||||
*
|
||||
* <p>This method returns <code>null</code> if <code>null</code> input.</p>
|
||||
*
|
||||
* @param array the array to reverse, may be <code>null</code>
|
||||
*/
|
||||
public static void reverse(char[] array) {
|
||||
public static void reverse(final char[] array) {
|
||||
if (array == null) {
|
||||
return;
|
||||
}
|
||||
|
|
@ -696,13 +694,13 @@ public class ArrayUtils {
|
|||
}
|
||||
|
||||
/**
|
||||
* Reverses the order of the given array.
|
||||
* <p>
|
||||
* The method does nothing if <code>null</code> is passed in.
|
||||
* <p>Reverses the order of the given array.</p>
|
||||
*
|
||||
* <p>This method returns <code>null</code> if <code>null</code> input.</p>
|
||||
*
|
||||
* @param array the array to reverse, may be <code>null</code>
|
||||
*/
|
||||
public static void reverse(byte[] array) {
|
||||
public static void reverse(final byte[] array) {
|
||||
if (array == null) {
|
||||
return;
|
||||
}
|
||||
|
|
@ -719,13 +717,13 @@ public class ArrayUtils {
|
|||
}
|
||||
|
||||
/**
|
||||
* Reverses the order of the given array.
|
||||
* <p>
|
||||
* The method does nothing if <code>null</code> is passed in.
|
||||
* <p>Reverses the order of the given array.</p>
|
||||
*
|
||||
* <p>This method returns <code>null</code> if <code>null</code> input.</p>
|
||||
*
|
||||
* @param array the array to reverse, may be <code>null</code>
|
||||
*/
|
||||
public static void reverse(double[] array) {
|
||||
public static void reverse(final double[] array) {
|
||||
if (array == null) {
|
||||
return;
|
||||
}
|
||||
|
|
@ -742,13 +740,13 @@ public class ArrayUtils {
|
|||
}
|
||||
|
||||
/**
|
||||
* Reverses the order of the given array.
|
||||
* <p>
|
||||
* The method does nothing if <code>null</code> is passed in.
|
||||
* <p>Reverses the order of the given array.</p>
|
||||
*
|
||||
* <p>This method returns <code>null</code> if <code>null</code> input.</p>
|
||||
*
|
||||
* @param array the array to reverse, may be <code>null</code>
|
||||
*/
|
||||
public static void reverse(float[] array) {
|
||||
public static void reverse(final float[] array) {
|
||||
if (array == null) {
|
||||
return;
|
||||
}
|
||||
|
|
@ -765,13 +763,13 @@ public class ArrayUtils {
|
|||
}
|
||||
|
||||
/**
|
||||
* Reverses the order of the given array.
|
||||
* <p>
|
||||
* The method does nothing if <code>null</code> is passed in.
|
||||
* <p>Reverses the order of the given array.</p>
|
||||
*
|
||||
* <p>This method returns <code>null</code> if <code>null</code> input.</p>
|
||||
*
|
||||
* @param array the array to reverse, may be <code>null</code>
|
||||
*/
|
||||
public static void reverse(boolean[] array) {
|
||||
public static void reverse(final boolean[] array) {
|
||||
if (array == null) {
|
||||
return;
|
||||
}
|
||||
|
|
@ -786,29 +784,29 @@ public class ArrayUtils {
|
|||
i++;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// IndexOf
|
||||
//-----------------------------------------------------------------------
|
||||
|
||||
/**
|
||||
* Find the index of the given object in the array.
|
||||
* <p>
|
||||
* The method returns -1 if a <code>null</code> array is passed in.
|
||||
* <p>Find the index of the given object in the array.</p>
|
||||
*
|
||||
* <p>This method returns <code>-1</code> if <code>null</code> input.</p>
|
||||
*
|
||||
* @param array the array to search through for the object, may be <code>null</code>
|
||||
* @param objectToFind the object to find, may be <code>null</code>
|
||||
* @return the index of the object within the array, or -1 if not found
|
||||
*/
|
||||
public static int indexOf(Object[] array, Object objectToFind) {
|
||||
public static int indexOf(final Object[] array, final Object objectToFind) {
|
||||
return indexOf(array, objectToFind, 0);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Find the index of the given object in the array starting at the given index.
|
||||
* <p>
|
||||
* The method returns -1 if a <code>null</code> array is passed in.
|
||||
* <p>
|
||||
* A negative startIndex is treated as zero. A startIndex larger than the array
|
||||
* length will return -1.
|
||||
* <p>Find the index of the given object in the array starting at the given index.</p>
|
||||
*
|
||||
* <p>This method returns <code>-1</code> if <code>null</code> input.</p>
|
||||
*
|
||||
* <p>A negative startIndex is treated as zero. A startIndex larger than the array
|
||||
* length will return -1.</p>
|
||||
*
|
||||
* @param array the array to search through for the object, may be <code>null</code>
|
||||
* @param objectToFind the object to find, may be <code>null</code>
|
||||
|
|
@ -816,7 +814,7 @@ public class ArrayUtils {
|
|||
* @return the index of the object within the array starting at the
|
||||
* given index, or -1 if not found
|
||||
*/
|
||||
public static int indexOf(Object[] array, Object objectToFind, int startIndex) {
|
||||
public static int indexOf(final Object[] array, final Object objectToFind, int startIndex) {
|
||||
if (array == null) {
|
||||
return -1;
|
||||
}
|
||||
|
|
@ -838,30 +836,30 @@ public class ArrayUtils {
|
|||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Find the last index of the given object within the array.
|
||||
* <p>
|
||||
* The method returns -1 if a <code>null</code> array is passed in.
|
||||
* <p>Find the last index of the given object within the array.</p>
|
||||
*
|
||||
* <p>This method returns <code>-1</code> if <code>null</code> input.</p>
|
||||
*
|
||||
* @param array the array to travers backwords looking for the object, may be <code>null</code>
|
||||
* @param objectToFind the object to find, may be <code>null</code>
|
||||
* @return the last index of the object to find, or -1 if not found
|
||||
*/
|
||||
public static int lastIndexOf(Object[] array, Object objectToFind) {
|
||||
public static int lastIndexOf(final Object[] array, final Object objectToFind) {
|
||||
if (array == null) {
|
||||
return -1;
|
||||
}
|
||||
return lastIndexOf(array, objectToFind, array.length - 1);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Find the last index of the given object in the array starting at the given index.
|
||||
* <p>
|
||||
* The method returns -1 if a <code>null</code> array is passed in.
|
||||
* <p>
|
||||
* A negative startIndex will return -1. A startIndex larger than the array
|
||||
* length will search from the end of the array.
|
||||
* <p>Find the last index of the given object in the array starting at the given index.</p>
|
||||
*
|
||||
* <p>This method returns <code>-1</code> if <code>null</code> input.</p>
|
||||
*
|
||||
* <p>A negative startIndex will return -1. A startIndex larger than the array
|
||||
* length will search from the end of the array.</p>
|
||||
*
|
||||
* @param array the array to traverse for looking for the object, may be <code>null</code>
|
||||
* @param objectToFind the object to find, may be <code>null</code>
|
||||
|
|
@ -869,7 +867,7 @@ public class ArrayUtils {
|
|||
* @return the last index of the object within the array starting at the given index,
|
||||
* or -1 if not found
|
||||
*/
|
||||
public static int lastIndexOf(Object[] array, Object objectToFind, int startIndex) {
|
||||
public static int lastIndexOf(final Object[] array, final Object objectToFind, int startIndex) {
|
||||
if (array == null) {
|
||||
return -1;
|
||||
}
|
||||
|
|
@ -893,18 +891,18 @@ public class ArrayUtils {
|
|||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Checks if the object is in the given array.
|
||||
* <p>
|
||||
* The method returns <code>false</code> if a <code>null</code> array is passed in.
|
||||
* <p>Checks if the object is in the given array.</p>
|
||||
*
|
||||
* <p>The method returns <code>false</code> if a <code>null</code> array is passed in.</p>
|
||||
*
|
||||
* @param array the array to search through
|
||||
* @param objectToFind the object to find
|
||||
* @return <code>true</code> if the array contains the object
|
||||
*/
|
||||
public static boolean contains(Object[] array, Object objectToFind) {
|
||||
public static boolean contains(final Object[] array, final Object objectToFind) {
|
||||
return (indexOf(array, objectToFind) != -1);
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue