集合框架练习3

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


public class zuqiudui {

    public static void main(String[] args) {
        List <String>list=new ArrayList<String>();
Collections.addAll(list, "中国","日本","韩国","美国","阿根廷","意大利","英国","法国","德国","比利时","巴西","新西兰","澳大利亚","新加坡","泰国","朝鲜");
Collections.shuffle(list);
for(int i=0;i<list.size();i++){
    System.out.printf(list.get(i)+"     ");
    if(i%4==3){
        System.out.println();
    }
}
        
    }

}