import java.util.Arrays;标签:int,array2,System,稀疏,数组,println,out From: https://www.cnblogs.com/123456dh/p/17095110.html
public class Demo08 {
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;
System.out.println("输出原始的数组");
//遍历二维数组
//局部变量 数组名
for (int[] ints: array1) {
for (int anInt : ints) {
System.out.print(anInt+"\t");
}
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 <array1.length ; i++) {
for (int j = 0; j <array1.length ; 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
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0的值存放到稀疏数组中
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]=i;//行
array2[count][1]=j;//列
array2[count][2]=array1[i][j];//具体的值
}
}
}
System.out.println("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]);
}
System.out.println("===============");
System.out.println("还原");
//1.读取稀疏数组
int[][] array3=new int[array2[0][0]][array2[0][1]];
//2.给其中的元素还原它的值
for (int i = 1; i <array2.length ; i++) {
array3[array2[i][0]][array2[i][1]]=array2[i][2];
}
//打印
for (int[] ints: array3) {
for (int anInt : ints) {
System.out.print(anInt+"\t");
}
System.out.println();
}
}
}