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ListUtil类添加countMap方法✒️

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大火yzs
2021-05-04 15:01:43 +08:00
parent 32e29438d7
commit a1dba4f36b
2 changed files with 51 additions and 8 deletions
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22
hutool-core/src/test/java/cn/hutool/core/collection/ListUtilTest.java
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@@ -10,6 +10,7 @@ import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
public class ListUtilTest {
@@ -46,6 +47,27 @@ public class ListUtilTest {
Assert.assertEquals("edit3", filter.get(2));
}
@Test
@Ignore
public void countMapTest(){
List<String> list = new ArrayList<>();
list.add("AAA");
list.add("BBB");
list.add("AAA");
list.add("CCC");
list.add("DDD");
list.add("DDD");
//统计不排序
Map<?, Long> countMap = ListUtil.countMap(list);
Console.log(countMap);
//统计倒序排列
Map<String, Long> descCountMap = ListUtil.countMap(list, Boolean.TRUE);
Console.log(descCountMap);
//统计正序排列
Map<String, Long> ascCountMap= ListUtil.countMap(list, Boolean.FALSE);
Console.log(ascCountMap);
}
@Test
public void indexOfAll() {
List<String> a = ListUtil.toLinkedList("1", "2", "3", "4", "3", "2", "1");