Get number of screen

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COMPLETE SOURCE CODE FOR : GetNumbersOfScreenInJava.java
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import java.awt.GraphicsEnvironment;
import java.awt.GraphicsDevice;

public class GetNumbersOfScreenInJava
{
 public static void main(String[]args)
 {
  GraphicsEnvironment myGraphicsEnvironment=GraphicsEnvironment.getLocalGraphicsEnvironment();
  GraphicsDevice[]storeAllScreen=myGraphicsEnvironment.getScreenDevices();
  
  System.out.println("THE NUMBERS OF SCREEN IN MY COMPUTER IS : "+storeAllScreen.length);
 }
}

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JUST COMPILE AND EXECUTE IT
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Get screen size

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COMPLETE SOURCE CODE FOR : GetScreenSize.java
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import java.awt.Toolkit;
import java.awt.Dimension;

public class GetScreenSize
{
 public static void main(String[]args)
 {
  Dimension dim=Toolkit.getDefaultToolkit().getScreenSize();
  System.out.println("YOUR SCREEN WIDTH : "+dim.width+" PIXELS");
  System.out.println("YOUR SCREEN HEIGHT : "+dim.height+" PIXELS");
 }
}

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JUST COMPILE AND EXECUTE IT
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Change cursor for a component

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COMPLETE SOURCE CODE FOR : HowToChangeComponentCursor.java
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import java.awt.Frame;
import java.awt.Component;
import java.awt.Cursor;

import java.awt.event.WindowListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class HowToChangeComponentCursor
{
 public static void main(String[]args)
 {
  WindowListener wl=new WindowAdapter()
  {
   public void windowClosing(WindowEvent evt)
   {
    System.exit(0);
   } 
  };
  
  Frame a=new Frame("HOVER YOUR CURSOR IN THIS FRAME");
  a.addWindowListener(wl);
  
  //METHOD setCursor WILL SET NEW CURSOR FOR COMPONENT
  a.setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
  
  a.setSize(800,600);
  a.setVisible(true);
 }
}

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JUST COMPILE AND EXECUTE IT
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