二维数组顺时针输出

很简单的一个算法，结果弄了半天，最后发现是行和列弄错了，心塞塞
这种题还是找出数学规律重要

/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

package javaapplication1;

/**
 *
 * @author YJZ
 */
public class PrintMatrixClockwisely {

    public static void PrintMatrix(int a[][],int columns,int rows){
        if(a==null||columns<=0||rows<=0){
            System.out.print("输入错误");
        }
        int start =0;
        while(columns>start*2&&rows>start*2){
            PrintMatrixInCircle(a,columns,rows,start);
            start++;
        }
    }
    public static void PrintMatrixInCircle(int a[][],int columns,int rows,int start){
        int endX=rows-1-start;
        int endY=columns-1-start;
        //从左到右
        for(int i=start;i<=endX;i++){
             int number=a[start][i];
            PrintNumber(number);
        }
        //从上到下
        if(startfor(int i=start+1;i<=endY;i++){
                int number=a[i][endX];
                PrintNumber(number);
            }
        }
        //从右到左
        if(startfor(int i=endX-1;i>=start;--i){
                int number=a[endY][i];
                PrintNumber(number);
            }
        }
        //从下到上
        if(start1){
            for(int i=endY-1;i>=start;--i){
                int number=a[i][start];
                PrintNumber(number);
            }
        }
    }
    public static void PrintNumber(int number) {
        System.out.print(number+" ");
    }
    public static void Text(int columns,int rows){
        int[][] aa=new int[columns][rows];
        int b=1;
        for(int i=0;ifor(int j=0;j" ");
    }
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        Text(4,1);
        Text(1,4);
        Text(4,4);
        Text(1,1);
    }
}