Dual screen application

Question

I need to run the application in two-screen mode. How to run the application on both screens as an independent window, but use the same application model?

Answer 1

If I'm not mistaken, this can help you. 1st position of your frames on each screen of the device.

frame1.setLocation(pointOnFirstScreen); frame2.setLocation(pointOnSecondScreen); 

to maximize:

 frame.setExtendedState(Frame.MAXIMIZED_BOTH); 

working example:

 import java.awt.BorderLayout; import java.awt.Color; import java.awt.Frame; import java.awt.GraphicsDevice; import java.awt.GraphicsEnvironment; import java.awt.Point; import javax.swing.BorderFactory; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextArea; import javax.swing.SwingUtilities; public class GuiApp1 { protected void twoscreen() { Point p1 = null; Point p2 = null; for (GraphicsDevice gd : GraphicsEnvironment.getLocalGraphicsEnvironment ().getScreenDevices()) { if (p1 == null) { p1 = gd.getDefaultConfiguration().getBounds().getLocation(); } else if (p2 == null) { p2 = gd.getDefaultConfiguration().getBounds().getLocation(); } } if (p2 == null) { p2 = p1; } createFrameAtLocation(p1); createFrameAtLocation(p2); } private void createFrameAtLocation(Point p) { final JFrame frame = new JFrame(); frame.setTitle("Test frame on two screens"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel panel = new JPanel(new BorderLayout()); final JTextArea textareaA = new JTextArea(24, 80); textareaA.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1)); panel.add(textareaA, BorderLayout.CENTER); frame.setLocation(p); frame.add(panel); frame.pack(); frame.setExtendedState(Frame.MAXIMIZED_BOTH); frame.setVisible(true); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { new GuiApp1().twoscreen(); } }); } } 

Answer 2

You need to take a look at the GraphicsDevice API, you can find a great example.

Oracle Source:

In a multi-screen environment, GraphicsConfiguration objects can render components on multiple screens. The following sample code demonstrates how to create a JFrame for each GraphicsConfiguration on each screen device in a GraphicsEnvironment:

 GraphicsEnvironment ge = GraphicsEnvironment. getLocalGraphicsEnvironment(); GraphicsDevice[] gs = ge.getScreenDevices(); for (int j = 0; j < gs.length; j++) { GraphicsDevice gd = gs[j]; GraphicsConfiguration[] gc = gd.getConfigurations(); for (int i=0; i < gc.length; i++) { JFrame f = new JFrame(gs[j].getDefaultConfiguration()); Canvas c = new Canvas(gc[i]); Rectangle gcBounds = gc[i].getBounds(); int xoffs = gcBounds.x; int yoffs = gcBounds.y; f.getContentPane().add(c); f.setLocation((i*50)+xoffs, (i*60)+yoffs); f.show(); } }