MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.awt.Color;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.geom.Rectangle2D;

import javax.swing.JComponent;
import javax.swing.JFrame;

public class MainClass {
    public static void main(String[] args) {
        JFrame jf = new JFrame("Demo");
        Container cp = jf.getContentPane();
        MyCanvas tl = new MyCanvas();
        cp.add(tl);
        jf.setSize(300, 200);
        jf.setVisible(true);
    }
}

class MyCanvas extends JComponent {
    Shape shape;

    public MyCanvas() {
        shape = create();
    }

    protected Shape create() {
        float cm = 72 / 2.54f;
        return new Rectangle2D.Float(cm, cm, 2 * cm, cm);
    }

    public void paint(Graphics g) {
        Graphics2D g2 = (Graphics2D) g;

        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

        g2.setPaint(Color.black);
        g2.draw(shape);
    }
}