Set JButton gradient color

Complete source code below will show you, how to change JButton default gradient color.



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COMPLETE SOURCE CODE FOR : SetJButtonGradientColor.java
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import java.util.LinkedList;

import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.UIManager;

import javax.swing.plaf.ColorUIResource;

public class SetJButtonGradientColor
{
public static void main(String[]args)
{
//Create UIManager object
UIManager manager=new UIManager();


//IMPORTANT : Key to know : "Button.gradient"

//Set color base on RGB
//You can get RGB value for your color at "Color picker" at above

//******************************************************
//Create linked list that will store all gradient information
//You can try to understand it by change it's value
LinkedList<Object> a=new LinkedList<Object>();
a.add(0.3);
a.add(0.3);

//First colour : R=2,G=208,B=206
a.add(new ColorUIResource(2,208,206));

//Second colour : R=136,G=255,B=254
a.add(new ColorUIResource(136,255,254));

//Third colour : R=0,G=142,B=140
a.add(new ColorUIResource(0,142,140));
//******************************************************

//Set Button.gradient key with new value
manager.put("Button.gradient",a);

//Create a button using JButton with text ( BUTTON )
JButton button=new JButton("BUTTON");

//Create a window using JFrame with title ( JButton gradient color )
JFrame frame=new JFrame("JButton gradient color");

//Add created button into JFrame
frame.add(button);

//Set default close operation for JFrame
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

//Set JFrame size
frame.setSize(330,80);

//Make JFrame visible. So we can see it.
frame.setVisible(true);
}
}

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JUST COMPILE AND EXECUTE IT
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Set JTextArea background image

Complete source code below will show you, how to set image background in a JTextArea. You can download image (textAreaBackground.jpg) that use in source code at below.

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COMPLETE SOURCE CODE FOR : AddImageBackgroundInJTextArea.java
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/**
*AddImageBackgroundInJTextArea will extends JTextArea class.
*So it also inherit all method from JTextArea
*It mean, we can use it directly.For example, setOpaque(false)..
**/
import javax.swing.*;

import java.awt.*;

public class AddImageBackgroundInJTextArea extends JTextArea
{
public AddImageBackgroundInJTextArea()
{
 //Create a window using JFrame with title ( Add image background in JTextArea )
 JFrame frame=new JFrame("Add image background in JTextArea");

 //Add JTextArea into JFrame
 frame.add(this);

 //Set default close operation for JFrame
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

 //Set JFrame size
 frame.setSize(500,500);

 //Make JFrame center
 frame.setLocationRelativeTo(null);

 //Make JFrame visible
 frame.setVisible(true);
}

//Override JTextArea paint method
//It enable us to paint JTextArea background image
public void paint(Graphics g)
{
 //Make JTextArea transparent
 setOpaque(false);

 //Make JTextArea line wrap
 setLineWrap(true);

 //Make JTextArea word wrap
 setWrapStyleWord(true);

 //Get image that we use as JTextArea background
 ImageIcon ii=new ImageIcon("textAreaBackground.jpg");
 Image i=ii.getImage();

 //Draw JTextArea background image
 g.drawImage(i,0,0,null,this);

 //Call super.paint. If we don't do this...We can't see JTextArea
 super.paint(g);
}

public static void main(String[]args)
{
 AddImageBackgroundInJTextArea aibijta=new AddImageBackgroundInJTextArea();
}
}

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JUST COMPILE AND EXECUTE IT
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textAreaBackground.jpg