Transparent JTextArea

Här är ett program som visar hur du kan göra din textarea transparant,

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;

public class GTextArea extends JFrame
{
	private TTextArea tt=new TTextArea();
	public static void main(String args[])
	{
		new GTextArea();
	}
	
	public GTextArea()
	{
		this.setSize(250,250);
		JPanel pnlMain=new PaintSurface();
		pnlMain.setLayout(new BorderLayout());
		pnlMain.add(tt,BorderLayout.CENTER);
		//pnlMain.add(new JButton("North"),BorderLayout.NORTH);
		//pnlMain.add(new JButton("South"),BorderLayout.SOUTH);
		//pnlMain.add(new JButton("West"),BorderLayout.WEST);
		//pnlMain.add(new JButton("East"),BorderLayout.EAST);
		setContentPane(pnlMain);
		setVisible(true);
		//this.setBackground(Color.GREEN);
	}
}

class PaintSurface extends JPanel {
	 
	    // Since we're always going to fill our entire
	    // bounds, allow Swing to optimize painting of us
	    public boolean isOpaque() {
	        return true;
	    }
	 
	    protected void paintComponent(Graphics g) {
	        // We'll do our own painting, so leave out
	        // a call to the superclass behavior
	 
	        // We're telling Swing that we're opaque, and
	        // we'll honor this by always filling our
	        // our entire bounds with solid colors.
	 
	        int w = getWidth();
	        int h = getHeight();
	        int leftW = w / 2;
	        int topH = h / 2;
	 
	        // Paint the top left and bottom right in red.
	        g.setColor(Color.RED);
	        g.fillRect(0, 0, leftW, topH);
	        g.fillRect(leftW, topH, w - leftW, h - topH);
	 
	        // Paint the bottom left and top right in white.
	        g.setColor(Color.WHITE);
	        g.fillRect(0, topH, leftW, h - topH);
	        g.fillRect(leftW, 0, w - leftW, topH);
	    }
	}

class TTextArea extends JTextArea
{
	int y=0;
	Color transcolor;
	public TTextArea()
	{
		super();
		this.setOpaque(false);
		this.transcolor=new Color(0,0,0,0);
	}
	public void paintComponent(Graphics g)
	{
			g.setColor(this.transcolor);
			g.fillRect(0,0,getWidth(),getHeight());
			super.paintComponent(g);
	}
}

Hoppas det är det som du söker :)

Källor:
Unleash Your Creativity with Swing and the Java 2D API
transparency jtextarea

/Viktor

Tack Viktor....men ;) det var faktiskt just den länken jag hittade, glömde att posta den länken i min tråd..