To prove safety offer20 clockwise print matrix

public class Test{
public static void main(String[] args) {
int[][] arr={
{1, 2, 3, 4},
{5, 6, 7, 8},
{9,10,11,12},
{13,14,15,16}
};
execute(arr);
}
public static void execute(int[][]arr) {
if(arr==null)return;
int row=arr.length;
int col=arr[0].length;
int start=0;
while(row>start2&&col>start2) {
print(arr, row, col, start);
start++;
}
}
public static void print(int[][]arr,int row,int col,int start) {
int endx=row-start-1;
int endy=col-start-1;
for(int i=start;i<=endx;i++) {
System.out.print(arr[start][i]+" “);
}
for(int i=start+1;i<=endy;i++) {
System.out.print(arr[i][endx]+” “);
}
for(int i=endx-1;i>=start;i–) {
System.out.print(arr[endy][i]+” “);
}
for(int i=endy-1;i>start;i–) {
System.out.print(arr[i][start]+” ");
}
}
}