public class ArrayDemo08 {
public static void main(String[] args) {
//1.创建一个二维数组 1:黑棋,2::白起 0:没有棋子
int[][] array1 =new int[11][11];
array1[1][2]=1;
array1[2][3]=2;
//输出原始数组
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();
}
System.out.println("==========================");
//转换为稀疏数组
//获取有效值个数
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("有效值个数"+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,将非零值放入数组中
System.out.println("稀疏数组");
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];
}
}
}
//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]);
}
//转换成二维数组
System.out.println("===============");
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];
}
for (int[] ints : array3) {
for (int anInt : ints) {
System.out.print(anInt+"\t");
}
System.out.println();
}
}
}
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