How to Draw a Circle in NetBeans

Instructions

1

Create a new project. Select "Java," then"Java Application." Create a main class named "DrawCircle." Click "Finish."

2

Enter the following code into the new "DrawCircle" class. This code represents a function that will draw a circle in a system window:

import java.awt.;
import java.awt.event.;
import java.awt.geom.*;

public class CircleDraw extends Frame
Shape circle = new Ellipse2D.Float(100.0f, 100.0f, 100.0f, 100.0f);
Shape square = new Rectangle2D.Double(100, 100,100, 100);
public void paint(Graphics g)
Graphics2D ga = (Graphics2D)g;
ga.draw(circle);
ga.fill(circle);
ga.setPaint(Color.red);
ga.draw(square);


3

Create the main function after the "CircleDraw" function:

public static void main(String args[])
Frame frame = new CircleDraw();
frame.addWindowListener(new WindowAdapter()
public void windowClosing(WindowEvent we)
System.exit(0);

);
frame.setSize(300, 250);
frame.setVisible(true);


This code will create a new system window, call the CircleDraw function, and draw the circle in the new window.

4

Press the green arrow in the top menu bar to run the program. A window containing a circle will appear.