int[] a = new int[]{25,6,56,17,8};
for (int i=1; i<5; i++) {
int temp = a[i];
int xia = i-1;
while( xia>=0 && temp<a[xia] ) //这个能正常运行，对的
//while( temp<a[xia] && xia>=0 ) //这个会报错。。。Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: -1 真令人摸不着头脑
{
a[xia+1] = a[xia];
xia--;
}
a[xia+1] = temp;
}
