CenterTextRectangle.java Source code

Introduction

Here is the source code for CenterTextRectangle.java

Source

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;

import javax.swing.JFrame;

public class CenterTextRectangle extends JFrame {

    public static void main(String[] a) {
        CenterTextRectangle f = new CenterTextRectangle();
        f.setSize(300, 300);
        f.setVisible(true);
    }

    final Font f = new Font("SansSerif", Font.BOLD, 18);

    public void paint(Graphics g) {
        Dimension d = this.getSize();

        g.setColor(Color.white);
        g.fillRect(0, 0, d.width, d.height);
        g.setColor(Color.black);
        g.setFont(f);
        drawCenteredString("This is centered.", d.width, d.height, g);
        g.drawRect(0, 0, d.width - 1, d.height - 1);
    }

    public void drawCenteredString(String s, int w, int h, Graphics g) {
        FontMetrics fm = g.getFontMetrics();
        int x = (w - fm.stringWidth(s)) / 2;
        int y = (fm.getAscent() + (h - (fm.getAscent() + fm.getDescent())) / 2);
        g.drawString(s, x, y);
    }
}