【LeetCode】Spiral Matrix II

Given an integer n, generate a square matrix filled with elements from 1 to n2 in spiral order.

For example,
Given n = 3,

You should return the following matrix:

[
 [ 1, 2, 3 ],
 [ 8, 9, 4 ],
 [ 7, 6, 5 ]
]
此题与Spiral Matrix类似，可以用相同的方法解决，相比之下，此题比前一题简单

public class Solution {
    public int[][] generateMatrix(int n) {
        int[][] matrix=new int[n][n];
        int temprow=n;
        int tempcol=n;
        int start =-1;
        int end=-1;
        int t=1;
        while(temprow>0&&tempcol>0){
            start++;
            end++;
            for(int i=start;i<tempcol;i++){
                matrix[start][i]=t;
                t++;
            }
                
            for(int j=start+1;j<temprow;j++){
                matrix[j][tempcol-1]=t;
                t++;
            }
            for(int x=tempcol-2;x>=end;x--){
                matrix[temprow-1][x]=t;
                t++;
            }
                
            for(int y=temprow-2;y>start;y--){
                matrix[y][end]=t;
                t++;
            }
                
            
            temprow=temprow-1;
            tempcol=tempcol-1;
        }
        return matrix;
        
    }
}