[英]i have a problem with exception “java.lang.ArrayIndexOutOfBoundsException”
i have a problem with exception "java.lang.ArrayIndexOutOfBoundsException" i wrote a program which have src array of 48 length then processes it to take each 6 indexes to another array using method arrayCopy and print each dst array for me it works fine it prints each 6 indexes from the initial array but at the end i get an exception help please . 我有一个异常“ java.lang.ArrayIndexOutOfBoundsException”的问题,我编写了一个程序,该程序具有48个长度的src数组,然后使用方法arrayCopy处理它以将每个6个索引带到另一个数组,并为我打印每个dst数组,它可以正常打印初始数组中的每个6个索引,但最后我得到异常帮助。 the algorithm is just a test because i want to use the arrayCopy in another algorithm so i don't need suggestion to change the algorithm .
该算法只是一个测试,因为我想在另一种算法中使用arrayCopy,因此我不需要建议改变算法。 i hope it is clear fair enough
我希望这很公平
public static void main(String [] arg)
{
int[] src = new int[48];
for(int j=0;j<src.length;j++)
{
src[j]=j+1;
System.out.print(src[j]+" ");
}
System.out.println();
int[] dst = new int[6];
int from=0;
for(int i=0;i<src.length;i++)
{
System.arraycopy(src, from, dst, 0, 6); // Copies 6 indexes from src starting at from into dst
from=from+6;
print(dst);
System.out.println();
}
}
public static void print(int [] dst)
{
for(int i=0;i<dst.length;i++)
System.out.print(dst[i]+" ");
}
Try this: 尝试这个:
for(int i=0;i<src.length;i+=6) // increment i by value 6
Or use from
in the for expression: 或在中使用
from
进行表达:
for(int from=0; from<src.length; from+=6) {
System.arraycopy(src, from, dst, 0, 6);
print(dst);
System.out.println();
}
在循环的最后一次迭代中,编写方式为+ 5 = 53(大于47)(因此超出了源范围)。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.