稀疏数组

package com.kuang.array;

public class ArrayDemo08 {
    public static void main(String[] args) {
        //1.创建一个二维数组 11*11 0：没有棋子 1：黑棋 2：白棋
        int[][] array1 = new int[11][11];
        array1[1][2] = 1;
        array1[2][3] =2;
        //输出原始的数组
        System.out.println("输出原始的数组");
        for (int[] ints : array1) {
            for (int anInt : ints) {
                System.out.print(anInt+"	");
            }
            System.out.println();
        }
        System.out.println("=================");
        //转换为稀疏数组保存
        //获取有效值的个数
        int sum =0;
        for (int i = 0; i <11 ; i++) {
            for (int j = 0; j <11 ; j++) {
                if(array1[i][j]!=0){
                    sum++;
                }
            }
        }
        System.out.println("有效值的个数："+sum);

        //2.创建一个稀疏数组的数组
        int[][] array2 = new int[sum+1][3];

        array2[0][0]=11;
        array2[0][1]=11;
        array2[0][2]=sum;
        //遍历二维数组，将非零的值，存在放在稀疏数组中
        int count=0;
        for (int i = 0; i <array1.length ; i++) {
            for (int j = 0; j < array1[i].length; j++) {
                if(array1[i][j]!=0){
                    count++;
                    array2[count][0]=i;
                    array2[count][1]=j;
                    array2[count][2]=array1[i][j];

                }
            }
        }
        System.out.println("稀疏数组");
        for (int i = 0; i <array2.length ; i++) {
            System.out.println(array2[i][0]+"	"+array2[i][1]+"	"+array2[i][2]+"	");
        }
        System.out.println("================");
        System.out.println("还原");
        //1.读取稀疏数组
        //int[][] array3 = new int[11][11];
        int[][] array3 = new int[array2[0][0]][array2[0][1]];
        for (int i = 1; i < array2.length; i++) {
            array3[array2[i][0]][array2[i][1]]=array2[i][2];
        }
        //3.打印
        System.out.println("还原原始的数组");
        for (int[] ints : array3) {
            for (int anInt : ints) {
                System.out.print(anInt+"	");
            }
            System.out.println();
        }
    }
}