Monday, 9 September 2013

How to Create CurveDraw In Java

In this section, you will learn how to create CurveDraw in java.awt package. This class,supported by thejava.awt.geom package, enables you to create a quadratic or cubic segment. Here, you will see in the following example that provide you complete code of the program.
Program Description:
Define class named CurveDraw, for creating  this component. 


QuadCurve2D.Double(): This QuadCurve2D class is defined as a quadratic parametric curve segment in (x, y) coordinate and the quadratic parametric curve segment is specified with Double Coordinate. This class supplies a coordinate space. Such that this class represents the coordinate parameter and is defined for using the CurveDraw component. A QuadCurve  draws the curve line with Double Coordinate. 

Here is the code of this program:
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;

public class CurveDraw extends Frame {
  Stroke drawingStroke = new BasicStroke(2);
  QuadCurve2D curve = new QuadCurve2D.Double(30,50,20,200,100,100);

  public void paint(Graphics g) {
  Graphics2D ga = (Graphics2D)g;
  ga.setStroke(drawingStroke);
  ga.setPaint(Color.green);
  ga.draw(curve);

  }

  public static void main(String args[]) {
  Frame frame = new CurveDraw();
  frame.addWindowListener(new WindowAdapter(){
  public void windowClosing(WindowEvent we){
  System.exit(0);
  }
  });
  frame.setSize(200200);
  frame.setVisible(true);
  }
}
Output of this program:
 
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