Sword finger offer 29 Print matrix clockwise

class Solution {
    
    public int[] spiralOrder(int[][] matrix) {
    
        if(matrix.length==0) return new int[]{
    };
        int m=matrix.length;
        int n=matrix[0].length;
        int[] res=new int[(m)*(n)];

       int top=0;int bottom=matrix.length-1; int left=0;int right=matrix[0].length-1;
       int x=0;
       while(true){
    
           for(int i=left;i<=right;i++) res[x++]=matrix[top][i];
           if(++top>bottom) break;
           for(int i=top;i<=bottom;i++) res[x++]=matrix[i][right];
           if(--right<left) break;
           for(int i=right;i>=left;i--) res[x++]=matrix[bottom][i];
           if(--bottom<top) break;
           for(int i=bottom;i>=top;i--) res[x++]=matrix[i][left];
           if(++left>right) break;
       }

       return res;

    }
}