java - 数组越界异常，找不到问题所在

Question

基本上，我在第 19 行遇到了 ArrayOutOfBounds 异常。我尝试只打印数组的内容而不分配任何值(注释掉 wile 循环)，但仍然是相同的错误，有人有修复吗？

package com.company;

import java.util.Random;

public class Main {
    static int[][] Placer = new int[2][2]; //create multi-dimenstional array to hold the numbers

    public static void main(String[] args) {
        Random random = new Random(); //intiallise new Random object
        int intsAssigned = 0; //will keep track of the ammount of ints assigned.



        //Assign all of the index's a random int, not the most practical way.
        while(intsAssigned != 9){
            int currentColumn = 0;
            Placer[currentColumn][0] = random.nextInt(20);
            Placer[currentColumn][1] = random.nextInt(20);
            Placer[currentColumn][2] = random.nextInt(20);
            currentColumn++;
            intsAssigned + 3;

        }
        printNumbers();

    }

    //Print all of the index's
    public static void printNumbers(){
        int numbersPrinted = 0;
        int currentColumn = 0;
        int currentRow = 0;
        while(numbersPrinted != 9){
            System.out.println(Placer[currentColumn][currentRow]);
            System.out.println(Placer[currentColumn][++currentRow]);
            System.out.println(Placer[currentColumn][currentRow + 2]);
            currentColumn++;
        }

    }
}

Answer 1

Placer 是一个 int[2][2]...但您正在尝试访问 Placer[currentColumn][2]。对于大小为 2 的数组，您只能访问两个索引:0 和 1。

也许您希望 Placer 成为 int[3][3]？