java8的新特性list的排序和去重

package io.jcwl.modules.drives.controller;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;

/**
 * Created by lenovo on 2018/5/27.  

//要使用jdk1.8编译

*/public class Texo { private Integer age = 14; class Status{ private Integer age ; String name ; public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; Status person = (Status) o; if (!age.equals(person.age)) return false; return name.equals(person.name); } @Override public int hashCode() { int result = age.hashCode(); result = 31 * result + name.hashCode(); return result; } public void print() { int age = 14; System.out.println("局部变量：" + age); System.out.println("内部类变量：" + this.age); System.out.println("外部类变量：" + Texo.this.age); } } public static void main(String[] arg ){ Texo.Status in = new Texo().new Status(); in.print(); List<Texo.Status> statuses=new ArrayList<Texo.Status>(); Texo.Status status= new Texo().new Status(); status.setAge(2); status.setName("zhangsan"); statuses.add(status); Texo.Status status3= new Texo().new Status(); status3.setAge(1); status3.setName("lisi"); statuses.add(status3); Texo.Status status4= new Texo().new Status(); status4.setAge(3); status4.setName("wangwu"); statuses.add(status4); Texo.Status status5= new Texo().new Status(); status5.setAge(3); status5.setName("wangwu"); statuses.add(status5); for (Texo.Status status1:statuses){ System.out.println("排序前"+status1.getName()+","+status1.getAge()); } statuses.sort((Texo.Status h1, Texo.Status h2) -> h1.getName().compareTo(h2.getName())); for (Texo.Status status1:statuses){ System.out.println("排序后"+status1.getName()+","+status1.getAge()); } // 去重 List<Texo.Status> personList = new ArrayList<Texo.Status>(); statuses.stream().forEach( p -> { if (!personList.contains(p)) { personList.add(p); } } ); System.out.println(personList); for (Texo.Status status1:personList){ System.out.println("Status去重后"+status1.getName()+","+status1.getAge()); } List<String> it =new ArrayList<String>(); it.add("1"); it.add("3"); it.add("2"); it.add("2"); for (String i:it){ System.out.println("排序前"+i); } Collections.sort(it, (s1, s2) -> s1.compareTo(s2)); for (String i:it){ System.out.println("排序后"+i); } List<String> its=it.stream().distinct().collect(Collectors.toList()); for (String i:its){ System.out.println("去重后"+i); } }}