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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 −
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