试图打印出ArrayList的内容 [英] Trying to print out the contents of an ArrayList

问题描述

我正在尝试打印出ArrayListlist的内容，但我不断得到我认为的元素位置而不是内容。

I'm trying to print out the contents of the ArrayList "list", but I keep getting what I think is the locations of the elements and not the contents.

import java.util.*;
public class Assignment23 {

public static void main (String[] args){

ArrayList<Point> list = new ArrayList<Point>();
for(int i = 0; i < 99; i++){
    list.add(new Point());
}
Collections.sort(list);
System.out.println(""+list);
}
}
class Point implements Comparable<Point>{
int x = (int)(Math.random()*-10);
int y = (int)(Math.random()*-10);

推荐答案

打印出<$ c $的内容c> ArrayList ，使用 for循环：

for (Point p : list)
    System.out.println("point x: " + p.x ", point y: " + p.y);

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