Java 从一个 List 中删除所有重复的元素： https://www.ossez.com/t/java-list/13942
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@ -4,9 +4,10 @@
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@ -62,8 +63,11 @@
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<module name="core-java-collections-list" />
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@ -167,22 +187,6 @@
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@ -459,7 +470,8 @@
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<MESSAGE value="格式化代码并修改错误" />
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<MESSAGE value="提交所有代码，为将默认分支名从 master 切换到 main 做准备" />
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@ -0,0 +1,64 @@
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package com.ossez.collections;
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import com.google.common.base.Predicates;
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import com.google.common.collect.Iterables;
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import com.google.common.collect.Lists;
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import com.google.common.collect.Sets;
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import org.apache.commons.collections4.CollectionUtils;
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import org.apache.commons.collections4.PredicateUtils;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.TestInstance;
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import java.util.*;
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import static org.hamcrest.MatcherAssert.assertThat;
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import static org.hamcrest.Matchers.*;
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/**
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* Test for list Clean up
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*
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* <p><a href="https://www.ossez.com/t/java-list/13942">https://www.ossez.com/t/java-list/13942</a></p>
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*
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* @author YuCheng
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*/
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@TestInstance(TestInstance.Lifecycle.PER_CLASS)
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public class JavaCollectionCleanupDuplicatesTest {
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// TESTS - REMOVE DUPLICATES
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@Test
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public void givenListContainsDuplicates_whenRemovingDuplicatesWithPlainJava_thenCorrect() {
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final List<Integer> listWithDuplicates = Lists.newArrayList(5, 0, 3, 1, 2, 3, 0, 0);
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final List<Integer> listWithoutDuplicates = new ArrayList<>(new HashSet<>(listWithDuplicates));
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assertThat(listWithoutDuplicates, hasSize(5));
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assertThat(listWithoutDuplicates, containsInAnyOrder(5, 0, 3, 1, 2));
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}
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@Test
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public void givenListContainsDuplicates_whenRemovingDuplicatesPreservingOrderWithPlainJava_thenCorrect() {
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final List<Integer> listWithDuplicates = Lists.newArrayList(5, 0, 3, 1, 2, 3, 0, 0);
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final List<Integer> listWithoutDuplicates = new ArrayList<>(new LinkedHashSet<>(listWithDuplicates));
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assertThat(listWithoutDuplicates, hasSize(5));
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assertThat(listWithoutDuplicates, containsInRelativeOrder(5, 0, 3, 1, 2));
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}
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@Test
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public void givenListContainsDuplicates_whenRemovingDuplicatesWithGuava_thenCorrect() {
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final List<Integer> listWithDuplicates = Lists.newArrayList(5, 0, 3, 1, 2, 3, 0, 0);
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final List<Integer> listWithoutDuplicates = Lists.newArrayList(Sets.newHashSet(listWithDuplicates));
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assertThat(listWithoutDuplicates, hasSize(5));
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assertThat(listWithoutDuplicates, containsInAnyOrder(5, 0, 3, 1, 2));
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}
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@Test
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public void givenListContainsDuplicates_whenRemovingDuplicatesPreservingOrderWithGuava_thenCorrect() {
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final List<Integer> listWithDuplicates = Lists.newArrayList(5, 0, 3, 1, 2, 3, 0, 0);
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final List<Integer> listWithoutDuplicates = Lists.newArrayList(Sets.newLinkedHashSet(listWithDuplicates));
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assertThat(listWithoutDuplicates, hasSize(5));
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assertThat(listWithoutDuplicates, containsInRelativeOrder(5, 0, 3, 1, 2));
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}
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}
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@ -71,7 +71,7 @@ public class JavaCollectionCleanupUnitTest {
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assertThat(list, hasSize(3));
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}
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// tests - remove duplicates
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// TESTS - REMOVE DUPLICATES
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@Test
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public void givenListContainsDuplicates_whenRemovingDuplicatesWithPlainJava_thenCorrect() {
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@ -2,15 +2,24 @@ package com.ossez.java8;
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import com.google.common.collect.Lists;
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import org.junit.Test;
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import org.junit.jupiter.api.TestInstance;
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import java.util.List;
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import java.util.Objects;
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import java.util.stream.Collectors;
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import static org.hamcrest.MatcherAssert.assertThat;
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import static org.hamcrest.Matchers.containsInAnyOrder;
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import static org.hamcrest.Matchers.hasSize;
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import static org.junit.Assert.assertThat;
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/**
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* Test for list Clean up
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*
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* <p><a href="https://www.ossez.com/t/java-list/13942">https://www.ossez.com/t/java-list/13942</a></p>
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*
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* @author YuCheng
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*/
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@TestInstance(TestInstance.Lifecycle.PER_CLASS)
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public class Java8CollectionCleanupUnitTest {
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// tests -
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