Displaying a 2D array of integers as an image in Java

Question

I'm trying to create an application in Java that will print an image based on an array of integers where each integer represents a color. Is there a straightforward way to accomplish this?

public void displayImage(int[][] arr){
    for(int i = 0; i < arr.length; i++){
        for(int j = 0; j < arr[0].length; j++){
            switch(arr[i][j]){
                case 1:
                //print a gray pixel at (i, j) within a frame
                case 0:
                //print a green pixel at (i, j) within a frame
                case 2:
                //print a white pixel at (i, j) within a frame
            }
        }
    }
}

trashgod · Accepted Answer · 2011-11-24T13:53:16.997

6

You can use BufferedImage, as shown in this example.

Addendum: The example cited updates the image's underlying WritableRaster using an int array of color components, but setRGB() is convenient if the color is already available.

edited Nov 24 '11 at 13:53

answered Nov 24 '11 at 03:15

trashgod

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This example is easy to follow. I think this example solved my problem. – Anderson Green Nov 24 '11 at 03:46
Excellent. After you've have a chance to tinker with it, you can accept this answer by clicking on the [empty check mark](http://meta.stackexchange.com/questions/5234/how-does-accepting-an-answer-work/5235#5235) at the left. – trashgod Nov 24 '11 at 13:54
A related example using `SwingWorker` is shown [here](http://stackoverflow.com/a/24977111/230513). – trashgod Aug 01 '14 at 20:36

Displaying a 2D array of integers as an image in Java

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