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Merge pull request #2144 from seaswalker/fix_swap_element

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Fix swap element
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Golden Looly 2022-02-17 09:29:43 +08:00 committed by GitHub
commit 10f65045e3
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2 changed files with 6 additions and 2 deletions
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4
hutool-core/src/main/java/cn/hutool/core/collection/ListUtil.java
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@ -608,7 +608,7 @@ public class ListUtil {
public static <T> void swapTo(List<T> list, T element, Integer targetIndex) { public static <T> void swapTo(List<T> list, T element, Integer targetIndex) {
if (CollUtil.isNotEmpty(list)) { if (CollUtil.isNotEmpty(list)) {
final int index = list.indexOf(element); final int index = list.indexOf(element);
if (index > 0) { if (index >= 0) {
Collections.swap(list, index, targetIndex); Collections.swap(list, index, targetIndex);
} }
} }
@ -627,7 +627,7 @@ public class ListUtil {
public static <T> void swapElement(List<T> list, T element, T targetElement) { public static <T> void swapElement(List<T> list, T element, T targetElement) {
if (CollUtil.isNotEmpty(list)) { if (CollUtil.isNotEmpty(list)) {
final int targetIndex = list.indexOf(targetElement); final int targetIndex = list.indexOf(targetElement);
if (targetIndex > 0) { if (targetIndex >= 0) {
swapTo(list, element, targetIndex); swapTo(list, element, targetIndex);
} }
} }

4
hutool-core/src/test/java/cn/hutool/core/collection/ListUtilTest.java
View File

@ -227,5 +227,9 @@ public class ListUtilTest {
ListUtil.swapElement(list, map2, map3); ListUtil.swapElement(list, map2, map3);
Map<String, String> map = list.get(2); Map<String, String> map = list.get(2);
Assert.assertEquals("李四", map.get("2")); Assert.assertEquals("李四", map.get("2"));
ListUtil.swapElement(list, map2, map1);
map = list.get(0);
Assert.assertEquals("李四", map.get("2"));
} }
} }