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Thread: Adding array elements inside a loop

  1. #1
    Member Scotty's Avatar
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    Default Adding array elements inside a loop

    How can I stop java 'forgetting' the contents of this array when outside the for loop. I cant think of a better way to get this 2d array into a list - it outputs OK in the loop, but not outside.

    for (int i=0; i<multi.length; i++) {
    	for (int j=0; j<multi[i].length; j++) {
    	line[j] = multi[i][j];
    	System.out.print(line[j]);
    	}
    	}


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    Default Re: Adding array elements inside a loop

    That loop works only inside for loop. You can't do it out-side of the for block.

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    Default Re: Adding array elements inside a loop

    I understand, that is my problem. Is there any way I can get my 2D-array into a list[]? or make the array available outside the loop?

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    Default Re: Adding array elements inside a loop

    I'm not sure I understand the question. Both your arrays are defined outside the loops, so do you want your 2d array stored into one large 1d array? Just declare a 1d array of the size of the 2d array, and set the appropriate values in the loop:
    int[] temp = new int[multi.length * multi[0].length];
    for ( int i = 0; i < multi.length; i++ ){
        for ( int j = 0; j < multi[i].length; j++ ){
            temp[i * multi[i].length + j] = multi[i][j];//
        }
    }

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