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convert string to tiltle case

This commit is contained in:
Marcos Lopez Gonzalez 2018-06-20 22:57:14 +02:00
parent 39916c3905
commit 5d589d37d4
3 changed files with 144 additions and 0 deletions
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6
core-java/pom.xml
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@ -203,6 +203,11 @@
<artifactId>mail</artifactId>
<version>1.5.0-b01</version>
</dependency>
<dependency>
<groupId>com.ibm.icu</groupId>
<artifactId>icu4j</artifactId>
<version>${icu4j.version}</version>
</dependency>
</dependencies>
<build>
@ -471,6 +476,7 @@
<maven-javadoc-plugin.version>3.0.0-M1</maven-javadoc-plugin.version>
<exec-maven-plugin.version>1.6.0</exec-maven-plugin.version>
<javax.mail.version>1.5.0-b01</javax.mail.version>
<icu4j.version>61.1</icu4j.version>
</properties>
</project>

68
core-java/src/main/java/com/baeldung/string/TitleCaseConverter.java Normal file
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@ -0,0 +1,68 @@
package com.baeldung.string;
import com.ibm.icu.lang.UCharacter;
import com.ibm.icu.text.BreakIterator;
import org.apache.commons.lang.WordUtils;
import java.util.Arrays;
import java.util.stream.Collectors;
public class TitleCaseConverter {
private static final String WORD_SEPARATOR = " ";
public static String convertToTitleCaseIteratingChars(String text) {
if (text == null || text.isEmpty()) {
return text;
}
StringBuilder converted = new StringBuilder();
boolean convertNext = true;
for (char ch : text.toCharArray()) {
if (Character.isSpaceChar(ch)) {
convertNext = true;
} else if (convertNext) {
ch = Character.toTitleCase(ch);
convertNext = false;
} else {
ch = Character.toLowerCase(ch);
}
converted.append(ch);
}
return converted.toString();
}
public static String convertToTitleCaseSplitting(String text) {
if (text == null || text.isEmpty()) {
return text;
}
return Arrays
.stream(text.split(WORD_SEPARATOR))
.map(word -> word.isEmpty()
? word
: Character.toTitleCase(word.charAt(0)) + word
.substring(1)
.toLowerCase())
.collect(Collectors.joining(WORD_SEPARATOR));
}
public static String convertToTitleCaseIcu4j(String text) {
if (text == null || text.isEmpty()) {
return text;
}
return UCharacter.toTitleCase(text, null);
}
public static String convertToTileCaseWordUtilsFull(String text) {
return WordUtils.capitalizeFully(text);
}
public static String convertToTileCaseWordUtils(String text) {
return WordUtils.capitalize(text);
}
}

70
core-java/src/test/java/com/baeldung/string/TitleCaseConverterTest.java Normal file
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@ -0,0 +1,70 @@
package com.baeldung.string;
import org.junit.Assert;
import org.junit.Test;
import static org.junit.Assert.*;
public class TitleCaseConverterTest {
private static final String TEXT = "tHis IS a tiTLe";
private static final String TEXT_EXPECTED = "This Is A Title";
private static final String TEXT_EXPECTED_NOT_FULL = "THis IS A TiTLe";
private static final String TEXT_OTHER_DELIMITERS = "tHis, IS a tiTLe";
private static final String TEXT_EXPECTED_OTHER_DELIMITERS = "This, Is A Title";
private static final String TEXT_EXPECTED_OTHER_DELIMITERS_NOT_FULL = "THis, IS A TiTLe";
@Test
public void whenConvertingToTitleCaseIterating_thenStringConverted() {
assertEquals(TEXT_EXPECTED, TitleCaseConverter.convertToTitleCaseIteratingChars(TEXT));
}
@Test
public void whenConvertingToTitleCaseSplitting_thenStringConverted() {
assertEquals(TEXT_EXPECTED, TitleCaseConverter.convertToTitleCaseSplitting(TEXT));
}
@Test
public void whenConvertingToTitleCaseUsingWordUtilsFull_thenStringConverted() {
assertEquals(TEXT_EXPECTED, TitleCaseConverter.convertToTileCaseWordUtilsFull(TEXT));
}
@Test
public void whenConvertingToTitleCaseUsingWordUtils_thenStringConvertedOnlyFirstCharacter() {
assertEquals(TEXT_EXPECTED_NOT_FULL, TitleCaseConverter.convertToTileCaseWordUtils(TEXT));
}
@Test
public void whenConvertingToTitleCaseUsingIcu4j_thenStringConverted() {
assertEquals(TEXT_EXPECTED, TitleCaseConverter.convertToTitleCaseIcu4j(TEXT));
}
@Test
public void whenConvertingToTitleCaseWithDifferentDelimiters_thenDelimitersKept() {
assertEquals(TEXT_EXPECTED_OTHER_DELIMITERS, TitleCaseConverter.convertToTitleCaseIteratingChars(TEXT_OTHER_DELIMITERS));
assertEquals(TEXT_EXPECTED_OTHER_DELIMITERS, TitleCaseConverter.convertToTitleCaseSplitting(TEXT_OTHER_DELIMITERS));
assertEquals(TEXT_EXPECTED_OTHER_DELIMITERS, TitleCaseConverter.convertToTileCaseWordUtilsFull(TEXT_OTHER_DELIMITERS));
assertEquals(TEXT_EXPECTED_OTHER_DELIMITERS_NOT_FULL, TitleCaseConverter.convertToTileCaseWordUtils(TEXT_OTHER_DELIMITERS));
assertEquals(TEXT_EXPECTED_OTHER_DELIMITERS, TitleCaseConverter.convertToTitleCaseIcu4j(TEXT_OTHER_DELIMITERS));
}
@Test
public void givenNull_whenConvertingToTileCase_thenReturnNull() {
assertEquals(null, TitleCaseConverter.convertToTitleCaseIteratingChars(null));
assertEquals(null, TitleCaseConverter.convertToTitleCaseSplitting(null));
assertEquals(null, TitleCaseConverter.convertToTileCaseWordUtilsFull(null));
assertEquals(null, TitleCaseConverter.convertToTileCaseWordUtils(null));
assertEquals(null, TitleCaseConverter.convertToTitleCaseIcu4j(null));
}
@Test
public void givenEmptyString_whenConvertingToTileCase_thenReturnEmptyString() {
assertEquals("", TitleCaseConverter.convertToTitleCaseIteratingChars(""));
assertEquals("", TitleCaseConverter.convertToTitleCaseSplitting(""));
assertEquals("", TitleCaseConverter.convertToTileCaseWordUtilsFull(""));
assertEquals("", TitleCaseConverter.convertToTileCaseWordUtils(""));
assertEquals("", TitleCaseConverter.convertToTitleCaseIcu4j(""));
}
}