package com.atguigu.java8;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Comparator;

import java.util.List;

import java.util.TreeSet;

import org.junit.Test;

public class TestLambda1 {

    //原来的匿名内部类

    @Test

    public void test1(){

        Comparator<String> com = new Comparator<String>(){

            @Override

            public int compare(String o1, String o2) {

                return Integer.compare(o1.length(), o2.length());

            }

        };

        TreeSet<String> ts = new TreeSet<>(com);

        TreeSet<String> ts2 = new TreeSet<>(new Comparator<String>(){

            @Override

            public int compare(String o1, String o2) {

                return Integer.compare(o1.length(), o2.length());

            }

        });

    }

    //现在的 Lambda 表达式

    @Test

    public void test2(){

        Comparator<String> com = (x, y) -> Integer.compare(x.length(), y.length());

        TreeSet<String> ts = new TreeSet<>(com);

    }

}