// DrawCenteredString.java

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

public class DrawCenteredString extends JApplet {
  public void drawCenteredString(Graphics page, String s, int x, int y, int width, int height) {
    // Find the size of string s in the font of the Graphics context "page"
    FontMetrics fm   = page.getFontMetrics(page.getFont());
    java.awt.geom.Rectangle2D rect = fm.getStringBounds(s, page);
    int textHeight = (int)(rect.getHeight());
    int textWidth  = (int)(rect.getWidth());
   
    // Center text horizontally and vertically within provided rectangular bounds
    int textX = x + (width - textWidth)/2;
    int textY = y + (height - textHeight)/2 + fm.getAscent();
    page.drawString(s, textX, textY);
  }
  
  public void paint(Graphics page) {
    // get the dimensions of the draw area
    int width  = this.getWidth();
    int height = this.getHeight();
   
    // clear the background
    page.setColor(Color.white);
    page.fillRect(0,0,width,height);

    // center a string in a box
    int boxX = 10, boxY = 20, boxWidth = 250, boxHeight = 100;
    page.setColor(Color.darkGray);
    page.fillRect(boxX,boxY,boxWidth,boxHeight);
    page.setFont(new Font("SansSerif",Font.BOLD|Font.ITALIC,32));
    page.setColor(Color.orange);
    drawCenteredString(page,"This is a test",boxX,boxY,boxWidth,boxHeight);
  }

   
  public void init() {
    setBackground(Color.white);
 }

  ////////////////////////////////////////////
  // Main (applet wrapper)
  ////////////////////////////////////////////
  public static void main(String[] args) {
    DrawCenteredString applet = new DrawCenteredString();
    applet.init();
    final JFrame frame = new JFrame("DrawCenteredString");
    frame.getContentPane().add(applet);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.pack();
    frame.setSize(400,400);
    frame.show();
  }  
}