Draw a Triangle using a Line2D
This section illustrates you how to draw a triangle using a Line2D.
To draw a triangle, we are using Line2D class of package
java.awt.geom.*.
This class provides a line segment in (x, y) coordinate space. We have draw
three line segments using the class Line2D to create a triangle.
The setPaint() method paints the line segment.
Here is the code of DrawTriangleUsingLine.java
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.geom.Line2D;
public class DrawTriangleUsingLine2D extends JApplet {
public void init() {
setBackground(Color.lightGray);
}
public void paint(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
g2d.setPaint(Color.red);
g2d.draw(new Line2D.Double(50,150,150,150 ));
g2d.draw(new Line2D.Double(50,50,150,150 ));
g2d.draw(new Line2D.Double(50,50,50,150 ));
}
public static void main(String s[]) {
JFrame frame = new JFrame("Show Triangle");
JApplet applet = new DrawTriangleUsingLine2D();
frame.getContentPane().add("Center", applet);
applet.init();
frame.setSize(300, 250);
frame.show();
}
}
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Output will be displayed as:
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