Set JTextField selection color

Complete source code below will show you how to set JTextField selection color.

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COMPLETE SOURCE CODE FOR : SetJTextFieldSelectionColor.java
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import javax.swing.*;

import java.awt.*;

public class SetJTextFieldSelectionColor
{
public static void main(String[]args)
{
 JTextField jtf=new JTextField("Select this text");

 //Color that will use as JTextField's selection color
 //It is base on RGB value
 //Red=255
 //Green=0
 //Blue=0
 //You can use color picker at above to get RGB value
 Color selectionColor=new Color(255,0,0);

 //Set JTextField selection color
 jtf.setSelectionColor(selectionColor);

 JFrame myWindow=new JFrame("Set JTextField selection color");

 myWindow.add(jtf);
 myWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 myWindow.setSize(400,50);
 myWindow.setLocationRelativeTo(null);
 myWindow.setVisible(true);
}
}

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Set JTextField caret color

Complete source code below will show you, how to set JTextField caret color.

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COMPLETE SOURCE CODE FOR : SetJTextFieldCaretColor.java
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import javax.swing.*;

import java.awt.*;

public class SetJTextFieldCaretColor
{
public static void main(String[]args)
{
 JTextField jtf=new JTextField(20);
 jtf.setFont(new Font("Verdana",Font.BOLD,34));

 JFrame myFrame=new JFrame("Set JTextField caret color");

 //Set caret color base on RGB value
 //R=255
 //G=0
 //B=0
 //You can get RGB value from color picker at above
 jtf.setCaretColor(new Color(255,0,0));

 myFrame.setLayout(new FlowLayout());
 myFrame.add(jtf);
 myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 myFrame.pack();
 myFrame.setLocationRelativeTo(null);
 myFrame.setVisible(true);
}
}

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JTextField caret

Java : Transparent JTextField

Complete source code below, will show you how to create a transparent text field in Java.

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COMPLETE SOURCE CODE FOR : TransparentJTextField.java
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import javax.swing.*;

import java.awt.*;

public class TransparentJTextField
{
public static void main(String[]args)
{
JFrame myFrame=new JFrame("Transparent JTextField");

JTextField test=new JTextField(10);

//MAKE JTextField TRANSPARENT
test.setOpaque(false);

myFrame.setLayout(new FlowLayout());
myFrame.add(test);
myFrame.setSize(400,100);
myFrame.setLocationRelativeTo(null);
myFrame.setVisible(true);
}
}

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For loop act as while loop

public class ForActAsWhile
{
public static void main(String[]args)
{
 /*
  * while(true)
  * {
  *  System.out.println("HELLO WORLD");
  * }
  *
  *
  *Now we will create for loop
  *that will act like while loop at above
  */
 
  /*
   *For loop at below is an unstopable loop.
   *It will act like while loop at above.
   *It has no i++ at last.So (i) value is always 0.
   *And 0 is less then 1.This condition is always true.
   *NOTE : <<DON'T EXECUTE IT!!>>.This is only for learning.
   */
  for(int i=0;i<1;)
  {
   System.out.println("HELLO WORLD");
  }
}
}

Java play wav file

Complete source code below will show you, how to play wav file in java.

Click here to download Star-Wars-4118.wav that will use with this code. Place this wav file same location with this source code file.

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COMPLETE SOURCE CODE FOR : PlayWavFile.java
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import java.io.File;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.SourceDataLine;

public class PlayWavFile
{
public static void main(String[]args)
{
String filename="Star-Wars-4118.wav";

int EXTERNAL_BUFFER_SIZE = 524288;

File soundFile = new File(filename);

if (!soundFile.exists())
{
 System.err.println("Wave file not found: " + filename);
 return;
}

AudioInputStream audioInputStream = null;
try
{
 audioInputStream = AudioSystem.getAudioInputStream(soundFile);
}
catch(Exception e)
{
 e.printStackTrace();
 return;
}

AudioFormat format = audioInputStream.getFormat();

SourceDataLine auline = null;

//Describe a desired line
DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);

try
{
 auline = (SourceDataLine) AudioSystem.getLine(info);

 //Opens the line with the specified format,
 //causing the line to acquire any required
 //system resources and become operational.
 auline.open(format);
}
catch(Exception e)
{
 e.printStackTrace();
 return;
}

 //Allows a line to engage in data I/O
auline.start();

int nBytesRead = 0;
byte[] abData = new byte[EXTERNAL_BUFFER_SIZE];

try
{
 while (nBytesRead != -1)
 {
  nBytesRead = audioInputStream.read(abData, 0, abData.length);
  if (nBytesRead >= 0)
  {
   //Writes audio data to the mixer via this source data line
   //NOTE : A mixer is an audio device with one or more lines
   auline.write(abData, 0, nBytesRead);
  }
 }
}
catch(Exception e)
{
 e.printStackTrace();
 return;
}
finally
{
 //Drains queued data from the line
 //by continuing data I/O until the
 //data line's internal buffer has been emptied
 auline.drain();

 //Closes the line, indicating that any system
 //resources in use by the line can be released
 auline.close();
}
}
}

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Java invisible cursor

Complete source code below will show you, how to create invisible cursor in java.

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COMPLETE SOURCE CODE FOR : MakeCursorInvisible.java
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import java.awt.Toolkit;
import java.awt.Cursor;
import java.awt.Point;
import java.awt.Image;

import javax.swing.JFrame;

public class MakeCursorInvisible
{
//Create an empty byte array
byte[]imageByte=new byte[0];

Cursor myCursor;
Point myPoint=new Point(0,0);

//Create image for cursor using empty array
Image cursorImage=Toolkit.getDefaultToolkit().createImage(imageByte);

public MakeCursorInvisible()
{
//Create cursor
myCursor=Toolkit.getDefaultToolkit().createCustomCursor(cursorImage,myPoint,"cursor");

JFrame frame=new JFrame("Put your cursor into me");

//Set cursor for JFrame using created cursor(myCursor)
frame.setCursor(myCursor);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(300,300);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}

public static void main(String[]args)
{
MakeCursorInvisible mci=new MakeCursorInvisible();
}
}

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Set file to Read-only in java

Complete source code below will show you, how to set a file to Read-only in java.

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COMPLETE SOURCE CODE FOR : SetFileReadOnly.java
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import java.io.File;

public class SetFileReadOnly
{
public static void main(String[]args)
{
File myFile=new File("MyFile.txt");

//Set MyFile.txt to Read-only
myFile.setReadOnly();
}
}

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Click here to download MyFile.txt

Note : Put MyFile.txt with java file above at the same location.

Java palindrome checker

What is palindrome ?
-Palindrome is a word or sequence that reads the same backwards as forwards.


For example :
MADAM

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COMPLETE SOURCE CODE FOR : JavaPalindromeChecker.java
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import java.util.Scanner;
import java.util.StringTokenizer;

public class JavaPalindromeChecker
{
public static void main(String[]args)
{
System.out.println("Put your text below");
Scanner sc=new Scanner(System.in);
String a=sc.nextLine();
StringTokenizer st=new StringTokenizer(a);
String b="";
while(st.hasMoreTokens())
{
 b=b+st.nextToken();
}
int stringLength=b.length();
String benchMark="Palindrome";
if(stringLength%2!=0)
{
 int c=((stringLength-1)/2);
 for(int i=0;i<c;i++)
 {
  char before=b.charAt(c-(i+1));
  char after=b.charAt(c+(i+1));
  if(before!=after)
  {
   benchMark=new String("Not Palindrome");
  }
 }
}
else
{
 int c=stringLength/2;
 for(int i=0;i<c;i++)
 {
  char before=b.charAt(i);
  char after=b.charAt(stringLength-(i+1));
  if(before!=after)
  {
   benchMark=new String("Not Palindrome");
  }
 }
}
System.out.println(benchMark);
}
}

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Java transparent splash screen

Sample

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TRANSPARENT IMAGE THAT WILL BE USE IN SOURCE CODE (batman.png)

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Note : Make sure batman.png locate at same location with java file below.You can use other location, but for this simple tutorial, we will use same location.

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COMPLETE SOURCE CODE FOR : TransparentSplashScreen.java
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import javax.swing.JWindow;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;

import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;


public class TransparentSplashScreen extends JWindow
{
//Get transparent image that will be use as splash screen image.
Image bi=Toolkit.getDefaultToolkit().getImage("batman.png");

ImageIcon ii=new ImageIcon(bi);

public TransparentSplashScreen()
{
try
{
setSize(ii.getIconWidth(),ii.getIconHeight());
setLocationRelativeTo(null);
show();
Thread.sleep(10000);
dispose();
JOptionPane.showMessageDialog(null,"This program will exit !!!","<>",JOptionPane.INFORMATION_MESSAGE);
}
catch(Exception exception)
{
exception.printStackTrace();
}
}

//Paint transparent image onto JWindow
public void paint(Graphics g)
{
g.drawImage(bi,0,0,this);
}

public static void main(String[]args)
{
TransparentSplashScreen tss=new TransparentSplashScreen();
}
}

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