package com.ven.java8.lambda;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Optional;
/**
* 使用Lambda排序
*
* @author xiaowen0623
*
*/
public class LambdaSort {
public static void main(String[] args) {
List<String> names = Arrays.asList("peter", "anna", "mike", "wbw");
// 第一种排序方式
Collections.sort(names, new Comparator<String>() {
@Override
public int compare(String a, String b) {
return a.compareTo(b);
}
});
// 第二种
Collections.sort(names, (String a, String b) -> {
return b.compareTo(a);
});
// 第三种
Collections.sort(names, (a, b) -> b.compareTo(a));
System.out.println(names);
List<String> names2 = Arrays.asList("peter", null, "anna", "mike", "xenia");
names2.sort(Comparator.nullsLast(String::compareTo));
System.out.println(names2);
List<String> names3 = null;
Optional.ofNullable(names3).ifPresent(list -> list.sort(Comparator.naturalOrder()));
System.out.println(names3);
}
}
java 8 Lambda排序
最新推荐文章于 2023-06-15 00:42:42 发布