全部都很有问题（①）

java 容器测试 ArrayList

函数实参形参关系测试

对象数组，传递应用，形参改变实参本身

import java.util.ArrayList;

public class Test4 {
    public static void main(String args[]){
        ArrayList<Integer> one = new ArrayList<>();
        one.add(23);
        one.add(45);
        one.add(56);
        methodInteger(one);
        System.out.println(one);

        ArrayList<String> two = new ArrayList<>();
        two.add("AGang");
        two.add("SYun");
        two.add("ZYao");
        two.add("HKai");
        methodString(two);
        System.out.println(two);
    }

    public static void methodInteger(ArrayList<Integer> one){
        one.set(0,0);
    }

    public static void methodString(ArrayList<String> two){
        two.set(0,"ZGang");
    }
}