With this tutorial we shall show you how to draw using the stroking pen. This is a very handy feature if you want to create simple graphics, by yourself. You can also create some cool paint applications using that.
In short, to draw using the stroking pen, one should follow these steps:
- Create a class tha extends
Componentand override thepaintmethod. - Create a new
BasicStrokewithBasicStroke.CAP_BUTTas an argument. - Use
BasicStroke.JOIN_MITER, ... )to customize the stroke. - Use
Graphics2D.setStroketo set up the stroke.
Let’s see the code snippets that follow.
package com.javacodegeeks.snippets.desktop;
import java.awt.BasicStroke;
import java.awt.Component;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
public class StrokingPenDrawing {
public static void main(String[] args) {
// Create a frame
Frame frame = new Frame();
// Add a component with a custom paint method
frame.add(new CustomPaintComponent());
// Display the frame
int frameWidth = 300;
int frameHeight = 300;
frame.setSize(frameWidth, frameHeight);
frame.setVisible(true);
}
/**
* To draw on the screen, it is first necessary to subclass a Component
* and override its paint() method. The paint() method is automatically called
* by the windowing system whenever component's area needs to be repainted.
*/
static class CustomPaintComponent extends Component {
public void paint(Graphics g) {
// Retrieve the graphics context; this object is used to paint shapes
Graphics2D g2d = (Graphics2D)g;
// A solid stroke
BasicStroke stroke = new BasicStroke(5.0f);
g2d.setStroke(stroke);
// Draw an oval that fills the window
int x = 0;
int y = 0;
int width = getSize().width-1;
int height = getSize().height-1;
/**
* The coordinate system of a graphics context is such that the origin is at the
* northwest corner and x-axis increases toward the right while the y-axis increases
* toward the bottom.
*/
g2d.drawOval(x, y, width, height);
// A dashed stroke
float miterLimit = 10f;
float[] dashPattern = {10f};
float dashPhase = 5f;
stroke = new BasicStroke(5.0f, BasicStroke.CAP_BUTT,
BasicStroke.JOIN_MITER, miterLimit, dashPattern, dashPhase);
g2d.setStroke(stroke);
// Draw an oval that fills half window
g2d.drawOval(width/4, height/4, width/2, height/2);
}
}
}
This was an example on how to draw using the stroking pen.
