Hi Friend,

Please try the following code. This will solve your problem.

class SwapDiagonalArray{
public static void main(String[] args){
int TwoDarray[][]=new int[][]{
{1,2,3},
{4,5,6},
{7,8,9}
};
for(int i=0; i<3;i++){
for(int j=0; j<3;j++){
System.out.print(" "+ TwoDarray[i][j]);
}
System.out.println("");
}

for(int i=0; i<3/2;i++){
for(int j=0; j<3/2;j++){
if(i!=j){
TwoDarray[i][j] = TwoDarray[i][j]+TwoDarray[j][i];
TwoDarray[j][i] = TwoDarray[i][j]-TwoDarray[j][i];
TwoDarray[i][j] = TwoDarray[i][j]-TwoDarray[j][i];
}
}
}
for(int i=0; i<3;i++){
for(int j=0; j<3;j++){
System.out.print(" "+ TwoDarray[i][j]);
}
System.out.println("");
}
}
}

Thanks
RoseIndia Team