使用Guava提供的filter过滤集合

List<String> list = new ArrayList<>();
list.add("AAA");
list.add("BBB");
list.add("CCC");

package com.rrq.guava;

import com.google.common.collect.Collections2;
import com.google.common.collect.Lists;

import java.util.Collection;
import java.util.List;

public class Demo02 {
    public static void main(String[] args) {

        //获取用户集合
        List<User> list = GetUserList();

        //使用filter方法过滤条件是Age大于18的数据
        Collection<User> result = Collections2.filter(list, x -> x.getAge() > 18);

        for (User item : result) {
            System.out.println(String.format("%s=%d", item.getName(), item.getAge()));
        }
    }

    //初始化用户列表
    public static List<User> GetUserList() {

        User user1 = new User();
        user1.setName("brazel");
        user1.setAge(18);

        User user2 = new User();
        user2.setName("AAA");
        user2.setAge(11);

        User user3 = new User();
        user3.setName("BBB");
        user3.setAge(20);

        User user4 = new User();
        user4.setName("CCC");
        user4.setAge(22);

        List<User> list = Lists.newArrayList();
        list.add(user1);
        list.add(user2);
        list.add(user3);
        list.add(user4);

        return list;
    }
}


class User {
    private String Name;

    private int Age;

    /***
     * 获取用户名
     *
     * @return
     */
    public String getName() {
        return Name;
    }

    /***
     * 设置用户名
     *
     * @return
     */
    public void setName(String name) {
        Name = name;
    }

    /***
     * 获取年龄
     ****/
    public int getAge() {
        return Age;
    }

    /**
     * 设置年龄
     **/
    public void setAge(int age) {
        Age = age;
    }
}