Java语言将数组转化为稀疏数组

package method_exercise;

public class ArrayDemo02 {
    public static void main(String[] args) {
        int[][] a=new int[6][6];
        a[2][3]=6;
        a[3][4]=9;
        System.out.println("输出原有数组:");
        for (int[] ints : a) {
            for (int anInt : ints) {
                System.out.print(anInt+" ");
            }
            System.out.println();
        }
        System.out.println("输出稀疏数组：");

        int sum=0;
        //获取有效值的个数
        for (int i = 0; i < a.length; i++) {
            for (int j = 0; j <a[i].length; j++) {
                if (a[i][j]!=0){
                    sum++;
                }
            }
        }
        //创建一个稀疏数组
        int[][] b=new int[sum+1][3];
        int count=0;
        for (int i = 0; i < a.length; i++) {
            for (int j = 0; j < a[i].length; j++) {
                if (a[i][j]!=0){
                    count++;
                    b[count][0]=i;//看下标，也可以是i+1
                    b[count][1]=j;//看下标，也可以是j+1
                    b[count][2]=a[i][j];
                }
            }
        }
        for (int i = 1; i < b.length; i++) {
            System.out.println(b[i][0]+"\t"
                    +b[i][1]+"\t"
                    +b[i][2]+"\t");
        }
    }
}