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
            }
        }
    }
}

Answer 1

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.