在Java中的增强型for循环中使用xor运算符

Question

sorry if this is a duplicate but I tried my hardest and couldn't find what exactly I'm doing wrong. I'm working on java concepts in hopes to take the certification exam in the upcoming year, and I'm playing around with enhanced for loops and getting used to using them. I tried making an enhanced for loop to search through an array, and using the xor (^) operator I'm wanting to determine the location of an element that matches another variable. the code I currently have is:

int[] x = {17, 16, 15};
    int y = 16;
    int z;
    for (int a : x) {
        z = x[a]^16;

        if (z==0)
            System.out.println(a);
        else;
    }

I can't seem to figure out why I'm getting an error. I know it has to do with the way I'm accessing the array at (z=x[a]^16), is there a better way to write this that I'm just not seeing? Thanks for the help in advanced.

Answer 1

The enhanced for loop provides each element in the array or list, not the index to the element. So, the first time around, a = 17. x[17] should give an array index exception. Note that your code compiles only because you created an array of int; if it was an array of String, then you would end up with a compile error.

In the future, include the error messages you get when you run your code.