稀疏数组

package com.xuyifan.function;

/**
 * @author xyf
 * @create 2020-08-13-21:36
 */
public class Demo12 {
    public static void main(String[] args) {
        //创建一个二维数组11*11 规定2为黑棋，1为白棋
        int [][]array1=new int[11][11];
        array1[1][2]=1;
        array1[2][3]=2;
        System.out.println("输出原始数组");
        for (int []ints:array1
             ) {
            for (int anint:ints
                 ) {
                System.out.print(anint+"\t");
                
            }
            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 < array1.length; i++) {
            for (int j = 0; j < array1.length; j++) {
                if (array1[i][j]!=0){
                    sum++;
                }
            }
            
        }
        //创建一个稀疏数组
        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，将非零的值存储到稀疏数组中
        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]=array1[i][j];
                    array2[count][1]=i;
                    array2[count][2]=j;
                }

            }
            
        }
        //输出稀疏数组
        for (int i = 0; i < array2.length; i++) {
            System.out.println(
                    array2[i][0]+"\t"+
                    array2[i][1]+"\t"+
                    array2[i][2]+"\t"
            );

        }

    }
}

输出原始数组
0    0    0    0    0    0    0    0    0    0    0    
0    0    1    0    0    0    0    0    0    0    0    
0    0    0    2    0    0    0    0    0    0    0    
0    0    0    0    0    0    0    0    0    0    0    
0    0    0    0    0    0    0    0    0    0    0    
0    0    0    0    0    0    0    0    0    0    0    
0    0    0    0    0    0    0    0    0    0    0    
0    0    0    0    0    0    0    0    0    0    0    
0    0    0    0    0    0    0    0    0    0    0    
0    0    0    0    0    0    0    0    0    0    0    
0    0    0    0    0    0    0    0    0    0    0    
输出稀疏数组
11    11    2    
1    1    2    
2    2    3