Java新特性解读JDK8之收集器joining函数

package com.example.collectordemo;


import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;


public class JoiningDemo {
  public static void main(String[] args) {
    List<String> list = Arrays.asList("1","2","3");
    String collect = list.stream().collect(Collectors.joining());
    System.out.println(collect);
    
    String collect2 = list.stream().collect(Collectors.joining(","));
    System.out.println(collect2);
    
    String collect3 = list.stream().collect(Collectors.joining(",", "[", "]"));
    System.out.println(collect3);
  }
}