How to make a canvas in Java Swing?

To make a canvas with Java Swing, use the Graphics2D class −

public void paint(Graphics g) {
   Graphics2D graphic2d = (Graphics2D) g;
   graphic2d.setColor(Color.BLUE);
   graphic2d.fillRect(100, 50, 60, 80);
}

Above, we have created a rectangle and also added color to it.

The following is an example to make a canvas in Java −

Example

package my;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class SwingDemo extends JPanel {
   @Override
   public void paint(Graphics g) {
      Graphics2D graphic2d = (Graphics2D) g;
      graphic2d.setColor(Color.BLUE);
      graphic2d.fillRect(100, 50, 60, 80);
   }
   public static void main(String[] args) {
      JFrame frame = new JFrame("Demo");
      frame.add(new SwingDemo());
      frame.setSize(550, 250);
      frame.setVisible(true);
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   }
}

This will produce the following output −

Ankith Reddy

Updated on 30-Jul-2019 22:30:26

• Related Questions & Answers
• How to make a Tkinter canvas rectangle transparent?
• How to maximize JFrame in Java Swing
• How to add a title to JTable in Java Swing?
• How do I make a transparent canvas in HTML5?
• How to make a Button using the Tkinter Canvas widget?
• How to highlight a row in a table with Java Swing?
• How to change Button Border in Java Swing
• How to add JTable to Panel in Java Swing?
• Java Program to append a row to a JTable in Java Swing
• How to leave space with EmptyBorder in Java Swing
• How to display row count in Java Swing JList
• Create a simple calculator using Java Swing
• How to add a new row to JTable with insertRow() in Java Swing
• How to set a different look and feels to swing components in Java?
• How to highlight multiple rows in a sequence in a table with Java Swing?