SRL Archive - Java Help and Tutorials

This probably has a very simple answer but i can't seem to find it…

How do I do this in java (c++ syntax i think):

for( i = 0, j = 100; i < arr.length && j > 30; i++, j--){

Thanks in advance :P

Assuming you've declared i, j, and arr, that piece of code should work just fine.

really?

here's the snippet.. (it makes an increasing array from one number to the next)

     public static int[] make(int from, int to){
        int[] arr = new int[Math.abs(from - to)];
        int low = to > from ? from : to;
        int hi = to < from ? from : to;
        int upOrDown = to > from ? 1 : -1;
        for (int j = 0, int i = low; j < arr.length && i < hi; j++, i + upOrDown){
            arr[j] = i;
        }
        return arr;
    }

it gives me this error when i mouse over the "for" line:

<identifier> expected

'.class' expected

')' expected

> expected

not a statement

> expecte...

I'm using Netbeans IDE btw…

When you're declaring multiple variables of the same type on the same line, you only include the type of the first variable. You'll want to remove the "int" before "i = low" in that piece of code.

Also, "i + upOrDown" doesn't modify i. You might be looking for "i = i + upOrDown", or "i += upOrDown" for short.

Ty Method :D!

just for the record here is the final function

    public static int[] make(int from, int to){
        int[] arr = new int[Math.abs(from - to) + 1];
        int inc = to > from ? 1 : -1;
        for (int j = 0, i = from; j < arr.length; j++, i += inc){
            arr[j] = i;
        }
        return arr;
    }