Java/Development Class/Toolkit

Centering a Frame, Window, or Dialog on the Screen

   <source lang="java">
 

import java.awt.Dimension; import java.awt.Toolkit; import javax.swing.JFrame; public class Main {

 public static void main(String[] argv) throws Exception {
   Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
   JFrame window = new JFrame();
   window.setSize(300,300);
   
   int w = window.getSize().width;
   int h = window.getSize().height;
   int x = (dim.width - w) / 2;
   int y = (dim.height - h) / 2;
   window.setLocation(x, y);
   window.setVisible(true);
 }

}

 </source>
   
  
 
  

Check Desktop Property by using the Toolkit.getDefaultToolkit()

   <source lang="java">
 

import java.awt.Toolkit; public class DynamicLayout {

 public static void main(String[] args) {
   Toolkit tk = Toolkit.getDefaultToolkit();
   Object prop = tk.getDesktopProperty("awt.dynamicLayoutSupported");
   System.out.println(tk.isDynamicLayoutActive() ? "yes" : "no");
   if (tk.isDynamicLayoutActive())
     tk.setDynamicLayout(false);
   else
     tk.setDynamicLayout(true);
   System.out.println(tk.isDynamicLayoutActive() ? "yes" : "no");
 }

}

 </source>
   
  
 
  

Getting the Screen Size

   <source lang="java">
 

import java.awt.Dimension; import java.awt.Toolkit; public class Main {

 public static void main(String[] argv) throws Exception {
   Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
   System.out.println(dim);
 }

}

 </source>
   
  
 
  

Use the getResourceAsStream method

   <source lang="java">
 

import java.awt.Image; import java.awt.Toolkit; import java.io.BufferedInputStream; import java.io.InputStream; public class Main {

 public static void main(String[] argv) throws Exception {
   InputStream is = Main.class.getResourceAsStream("image.gif");
   BufferedInputStream bis = new BufferedInputStream(is);
   byte[] byBuf = new byte[10000];
   int byteRead = bis.read(byBuf, 0, 10000);
   Image img = Toolkit.getDefaultToolkit().createImage(byBuf);
 }

}

 </source>