public class SparseArray {
int num = 0;
for (int i = 0;i<chessArr1.length;i++){
for (int j=0;j<chessArr1[i].length;j++){
if(chessArr1[i][j] != 0){
num++;
}
}
}
int sparseArr[][] = new int[num+1][3];
sparseArr[0][0] = chessArr1.length;
sparseArr[0][1] = chessArr1[0].length;
sparseArr[0][2] = num;
int count = 0;
for (int i = 0; i < chessArr1.length; i++) {
for (int j=0;j<chessArr1[i].length;j++){
if(chessArr1[i][j]!=0){
count++;
sparseArr[count][0] = i;
sparseArr[count][1] = j;
sparseArr[count][2] = chessArr1[i][j];
}
}
}
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("由稀疏数组还原所得的二维数组为:");
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();
}
}
}
public static void main(String[] args) {
int chessArr1[][] = new int[11][11];
chessArr1[1][2] = 1;
chessArr1[2][3] = 2;
System.out.println("原始的二维数组为:");
for (int i = 0; i < chessArr1.length; i++) {
for (int j = 0; j < chessArr1[i].length; j++) {
System.out.printf(chessArr1[i][j] + "\t");
}
System.out.println("\n");
}