How to press combination key using java Robot class ???

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COMPLETE SOURCE CODE FOR : PressCombinationKeyUsingRobot.java
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import java.awt.Robot;

import java.awt.event.KeyEvent;

public class PressCombinationKeyUsingRobot
{
 public static void main(String[]args)
 {
  //Combination Alt+F4 is a window close order in windows operating system
  //How to implement combination of Alt and F4 in using Robot class
  
  try
  {
   Robot a=new Robot();
   a.keyPress(KeyEvent.VK_ALT);
   a.keyPress(KeyEvent.VK_F4);
   a.keyRelease(KeyEvent.VK_ALT);
   a.keyRelease(KeyEvent.VK_F4);
  }
  catch(Exception exception)
  {
   exception.printStackTrace();
  }
 }
}

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How to make a program that can press keyboard for you ???

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COMPLETE SOURCE CODE FOR : PressKeyboard.java
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import java.awt.Robot;
import java.awt.event.KeyEvent;

public class PressKeyboard
{
 public static void main(String[]args)
 {
  try
  {
  
   Robot a=new Robot();
  
   while(true)
   {
     //THIS PROGRAM WILL PRESS A FOR YOU
     a.keyPress(KeyEvent.VK_A);

     //THIS PROGRAM WILL SLEEP FOR 5 second
     a.delay(5000);
   }
  }
  catch(Exception exception)
  {
   exception.printStackTrace();
  }
 }
}

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How to move cursor on screen using java ???

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COMPLETE SOURCE CODE FOR : MovingCursorOnScreen.java
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import java.awt.Robot;

public class MovingCursorOnScreen
{
 public static void main(String[]args)
 {
  try
  {
   int Xcoordinate=10;
   int Ycoordinate=50;
   
   Robot a=new Robot();
   
   //this method will move your cursor to the location base on Xcoordinate and Ycoordinate
   a.mouseMove(Xcoordinate,Ycoordinate);
  }
  catch(Exception exception)
  {
   exception.printStackTrace();
  }
 }
}

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Source code to convert integer to string in java

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COMPLETE SOURCE CODE FOR : ConvertIntegerToString.java
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public class ConvertIntegerToString
{
 public static void main(String[]args)
 {
  int sampleNumber=123;
  
  //Convert integer to string
  String stringForNumber=Integer.toString(sampleNumber);
  
  System.out.println(stringForNumber);
 }
}

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Source code to determine display mode for current screen can change or not using java

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

public class DetermineDisplayModeCanChangeOrNot
{
 public static void main(String[]args)
 {
  GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();
  GraphicsDevice gd=ge.getDefaultScreenDevice();
  
  //METHOD isDisplayChangeSupported() returns true if this GraphicsDevice  supports low-level display changes.
  boolean change=gd.isDisplayChangeSupported();
  
  if(change==true)
  {
   System.out.println("DISPLAY MODE CAN CHANGE");
  }
  
  else
  {
   System.out.println("DISPLAY MODE CANNOT CHANGE");
  }
 }
}

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Current refresh rate

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

public class RefreshRateForCurrentScreen
{
 public static void main(String[]args)
 {
  GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();
  GraphicsDevice gd=ge.getDefaultScreenDevice();
  DisplayMode dm=gd.getDisplayMode();
  
  //Print refresh rate for current screen
  System.out.println("REFRESH RATE FOR CURRENT SCREEN : "+dm.getRefreshRate());
 }
}

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Current bit depth

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

import java.awt.DisplayMode;

public class CurrentBitDepth
{
 public static void main(String[]args)
 {
  //HOW TO GET CURRENT SCREEN BIT DEPTH
  
  GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();
  GraphicsDevice gd=ge.getDefaultScreenDevice();
  DisplayMode dm=gd.getDisplayMode();
  
  //Print current bit depth
  System.out.println("CURRENT SCREEN BIT DEPTH IS: "+dm.getBitDepth());
 }
}

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Second full screen

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COMPLETE SOURCE CODE FOR : FullScreenInJava2.java
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import java.awt.Frame;
import java.awt.Button;

import java.awt.Dimension;
import java.awt.Toolkit;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

import java.awt.FlowLayout;

public class FullScreenInJava2
{
 public static void main(String[]args)
 {
  Frame a=new Frame();
  Button b=new Button("CLICK HERE TO DISABLE FULL SCREEN");
  
  ActionListener al=new ActionListener()
  {
   public void actionPerformed(ActionEvent evt)
   {
    System.exit(0);
   } 
  };
  
  b.addActionListener(al);
  
  a.setLayout(new FlowLayout());
  a.add(b);
  
  a.setSize((Toolkit.getDefaultToolkit().getScreenSize()).width,(Toolkit.getDefaultToolkit().getScreenSize()).height);
  a.setUndecorated(true);
  a.setAlwaysOnTop(true);
  a.setVisible(true);
 }
}

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First full screen

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

import java.awt.Frame;
import java.awt.Window;
import java.awt.Button;

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

import java.awt.FlowLayout;

import java.awt.Color;

public class FullScreenInJava
{
 public static void main(String[]args)
 {
  GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();
  GraphicsDevice gd=ge.getDefaultScreenDevice();
  
  ActionListener al=new ActionListener()
  {
   public void actionPerformed(ActionEvent evt)
   {
    GraphicsEnvironment ge2=GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice gd2=ge2.getDefaultScreenDevice();
    gd2.setFullScreenWindow(null);
   } 
  };
  
  Frame a=new Frame();
  
  Button b=new Button("CLICK HERE TO DISABLE FULL SCREEN");
  b.addActionListener(al);
  
  WindowListener wl=new WindowAdapter()
  {
   public void windowClosing(WindowEvent evt)
   {
    System.exit(0);
   } 
  };
  
  a.addWindowListener(wl);
  a.setSize(300,300);
  
  Window c=new Window(a);
  c.setAlwaysOnTop(true);
  c.setLayout(new FlowLayout());
  c.setBackground(Color.DARK_GRAY);
  c.add(b);
  gd.setFullScreenWindow(c);
  c.validate();
 }
}

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Determine platform support for full screen

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COMPLETE SOURCE CODE FOR : DetermineFullScreenSupport.java
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import java.awt.Frame;
import java.awt.Window;

import java.awt.GraphicsEnvironment;
import java.awt.GraphicsDevice;

public class DetermineFullScreenSupport
{
 public static void main(String[]args)
 {
  GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();
  GraphicsDevice gd=ge.getDefaultScreenDevice();
  
  if(gd.isFullScreenSupported())
  {
   System.out.println("FULL SCREEN SUPPORTED");
  }
  else
  {
   System.out.println("FULL SCREEN NOT SUPPORTED");
  }
 }
}

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