1.创建一个数组
//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("原始数组为:");
for (int[] ints : array1) {
for (int anInt : ints) {
System.out.print(anInt+"\t");
}
System.out.println();
}
输出结果为:
2.转换为稀疏数组
//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;
array2[count][1] = j;
array2[count][2] = array1[i][j];
}
}
}
//输出稀疏数组
System.out.println("稀疏数组:");
System.out.println("行 列 数");
for (int i = 0; i < array2.length; i++) {
System.out.println(
array2[i][0]+"\t"+
array2[i][1]+"\t"+
array2[i][2]+"\t"
);
}
输出结果为:
3.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];
}
//3.打印
System.out.println("还原数组为:");
for (int[] ints : array3) {
for (int anInt : ints) {
System.out.print(anInt+"\t");
}
System.out.println();
}
输出结果为:
原文:https://www.cnblogs.com/w1074217772/p/14608763.html