从教材看的求马鞍点的例子，自己打了一边，运行时提示数组下标越界，怎么解决啊。。。
高手帮着看一下
public class MyPoint
{
    public static void main(String []args)
    {
        int a[][]={{1,2,3,4,5},{7,3,4,5,6},{2,1,5,4,3},{5,3,6,5,4}};
        int maxa[][]=new int[4][5];
        int mina[][]=new int[4][5];
        int i,j,temp;
        for(i=0;i<a.length;i++)
        {
            temp=a[i][0];
            for(j=0;i<a[i].length;j++)
            {
                if(a[i][j]<temp)
                {temp=a[i][j];}
            }
            for(j=0;j<a[i].length;j++)
            {
                if(a[i][j]==temp)
                {mina[i][j]=1;}
            }
        }
        for(j=0;j<a[0].length;j++)
        {
            temp=a[0][j];
            for(i=0;i<a.length;i++)
            {
                if(a[i][i]>temp)
                {temp=a[i][j];}
            }
            for(i=0;i<a.length;i++)
            {
                if(a[i][j]==temp)
                {maxa[i][j]=1;}
            }
        }
        for(i=0;i<a.length;i++)
        {
            for(j=0;j<a[i].length;j++)
            {
                System.out.print(" "+a[i][j]+" ");
                System.out.println();
            }
        }
        for(i=0;i<a.length;i++)
        {
            for(j=0;j<a[i].length;j++)
            {
                if(mina[i][j]+maxa[i][j]==2)
                {
                    System.out.println(" "+i+"行"+j+"列是一个马鞍点值"+a[i][j]);
                }
            }
        }
    }
}