Queen problem

Question

cannt get desired output
public class Queen_prob {

public static void main(String[] args) {
int arr[][]=new int [4][4];
Queenplace(arr,4);

}

private static void Queenplace(int[][] arr, int N) {
int r=0;
helper(arr,N,r);
}

private static void helper(int[][] arr, int n, int r) {
if(r==n) {
PrintBoard(arr);
}
for(int j=0;j<n;j++) {
if(isvalid(arr,r,j)) {
arr[r][j]=1;
helper(arr, n, r+1);
arr[r][j]=0;
}
}
return; //backtracking

}

private static void PrintBoard(int[][] arr) {
for(int i=0;i<arr.length;i++) {
for(int j=0;j<arr.length;j++) {
System.out.print(arr[i][j]+" ");
}
System.out.println();
}
}

private static boolean isvalid(int[][] arr, int r, int j) {
for(int i=r-1,ji=j-1;i>=0&&ji>=0;i--,j--) {
if(arr[i][ji]==1) {
return false;
}
}
for(int i=r+1,ji=j+1;i<arr.length&&ji<arr.length;i++,j++) {
if(arr[i][ji]==1) {
return false;
}
}
for(int i=r-1,ji=j+1;i>=0&&j<arr.length;i--,j++) {
if(arr[i][ji]==1) {
return false;
}
}
for(int i=r+1,ji=j-1;i<arr.length&&ji>=0;i++,j--) {
if(arr[i][ji]==1) {
return false;
}
}
for(int i=r-1;i>=0;i--) {
if(arr[i][j]==1) {
return false;
}
}
for(int i=r+1;i<arr.length;i++) {
if(arr[i][j]==1) {
return false;
}
}
return true;

}

}

Answer 1

What is the desired output?

Answer 2

subrat yadav
maybe this?

https://code.sololearn.com/czL1JYE5LpUb/?ref=app