java & fullscreen over multiple monitors

Question

A snippet from my Java application: ``` JFrame f = new JFrame(); GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); GraphicsDevice gd = ge.getDefaultScreenDevice(); gd.setFullScreenWindow(f); ``` So what it does is make it self fullscreen. Now the odd thing is that the program is fullscreen but only on one monitor! E.g. I have a windows vista system with two screens that are combined in one desktop. What to do automatically let it go fullscreen over all monitors? Ok I tried that: ``` import java.awt.image.ColorModel; import java.awt.GraphicsConfiguration; import java.awt.GraphicsDevice; import java.awt.GraphicsEnvironment; import java.awt.Rectangle; class grdevs { public static void main(String [] args) { GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); GraphicsDevice[] gs = ge.getScreenDevices(); for(GraphicsDevice curGs : gs) { GraphicsConfiguration[] gc = curGs.getConfigurations(); for(GraphicsConfiguration curGc : gc) { Rectangle…

Accepted Answer

You could try:

```
int width = 0;
int height = 0;
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice[] gs = ge.getScreenDevices();
for (GraphicsDevice curGs : gs)
{
  DisplayMode mode = curGs.getDisplayMode();
  width += mode.getWidth();
  height = mode.getHeight();
}
```

This should calculate the total width of multiple screens. Obviously it only supports horizontally aligned screens in the form above - you'd have to analyse the bounds of the graphics configurations to handle other monitor alignments (depends how bulletproof you want to make it).

Edit: And then set the size of your frame: `f.setSize(width, height);`

java & fullscreen over multiple monitors

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