代码实现
package com.xz.sparsearr;
public class SparseArray {
public static void main(String[] args) {
int[][] chessArr1 = new int[11][11];
chessArr1[1][2] = 1;
chessArr1[2][3] = 2;
chessArr1[3][3] = 2;
System.out.println("原始的二维数组:");
for (int[] row : chessArr1) {
for (int data : row) {
System.out.print(data + "\t");
}
System.out.println();
}
int sum = 0;
for (int i = 0; i < 11; i++) {
for (int j = 0; j < 11; j++) {
if (chessArr1[i][j] != 0) {
sum++;
}
}
}
int[][] sparseArr = new int[sum + 1][3];
sparseArr[0][0] = 11;
sparseArr[0][1] = 11;
sparseArr[0][2] = sum;
int count = 0;
for (int i = 0; i < 11; i++) {
for (int j = 0; j < 11; j++) {
if (chessArr1[i][j] != 0) {
count++;
sparseArr[count][0] = i;
sparseArr[count][1] = j;
sparseArr[count][2] = chessArr1[i][j];
}
}
}
System.out.println("============");
System.out.println("得到的稀疏数组为:");
for (int i = 0; i < sparseArr.length; i++) {
for (int j = 0; j < sparseArr[i].length; j++) {
System.out.print(sparseArr[i][j] + "\t");
}
System.out.println();
}
int[][] chessArr2 = new int[sparseArr[0][0]][sparseArr[0][1]];
for (int i = 1; i < sparseArr.length; i++) {
chessArr2[sparseArr[i][0]][sparseArr[i][1]] = sparseArr[i][2];
}
System.out.println("================");
for (int i = 0; i < chessArr2.length; i++) {
for (int j = 0; j < chessArr2[i].length; j++) {
System.out.print(chessArr2[i][j]+"\t");
}
System.out.println();
}
}
}
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