fonttest.java

this is my java Test

import java.awt.*;
import java.awt.font.*;
import java.awt.geom.*;
import javax.swing.*;

public class FontTest
{
	public static void main(String[] args)
	{
		FontFrame frame=new FontFrame();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);
	}
}
/**
   A frame with a text message panel
*/
class FontFrame extends JFrame
{
	public FontFrame()
	{
		setTitle("FontTest");
		setSize(DEFAULT_WIDTH,DEFAULT_HEIGHT);
		//add panel to frame
		FontPanel panel=new FontPanel();
		add(panel);
	}
	public static final int	DEFAULT_WIDTH=300;
	public static final int DEFAULT_HEIGHT=200;
}
/**
   A panel that shows a center message in a box.
   */
class FontPanel extends JPanel
{ 
	public void paintComponent(Graphics g)
	{
		super.paintComponent(g);
		Graphics2D g2=(Graphics2D) g;
		String message="hello,world!";
		Font f=new Font("serif",Font.BOLD,36);
		g2.setFont(f);
		//measure the size of the message
		FontRenderContext context=g2.getFontRenderContext();
		Rectangle2D bounds=f.getStringBounds(message,context);
		//set(x,y)=top left corner of text
		double x=(getWidth()-bounds.getWidth())/2;
		double y=(getHeight()-bounds.getHeight())/2;
		//add ascent to y to reach the baseline
		double ascent=-bounds.getY();
		double baseY=y+ascent;
		//draw the message
		g2.drawString(message,(int)x,(int)baseY);
		g2.setPaint(Color.GRAY);
		//draw the baseline
		g2.draw(new Line2D.Double(x,baseY,x+bounds.getWidth(),baseY));
		//draw the enclosing rectangle
		Rectangle2D rect=new Rectangle2D.Double(x,y,bounds.getWidth(),bounds.getHeight());
		g2.draw(rect);
	}
}