How do you increase the thickness of lines?

Question

Hi
Hope you can help, im writing an applet which requires lines to be drawn on screen. I know how to draw the actual line but i'm having problems with the thickness of the line.
I would like to make the line thicker but im not sure how to do this
Any help would be much appreciated

Answer 1

Look at the Stroke object that Graphics2D uses. One way to use it is like so:
Graphics2D g2 = (Graphics2D)g;
int lineThickness = 4;
g2.setStroke(new BasicStroke(lineThickness));Here's a more detailed example that uses a JApplet:
import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import javax.swing.JPanel;
class GraphicsEg2
    private JPanel mainPanel = new JPanel();
    private JPanel graphicsPanel = new JPanel()
        protected void paintComponent(Graphics g)
            super.paintComponent(g);
            myPaint(g);
    public GraphicsEg2()
        mainPanel.setPreferredSize(new Dimension(800, 800));
        mainPanel.setLayout(new BorderLayout());
        mainPanel.add(graphicsPanel);
    private void myPaint(Graphics g)
        drawMyRect(g);
        drawMyEllipse((Graphics2D)g);
    private void drawMyEllipse(Graphics2D g2)
        Ellipse2D myEllipse = new Ellipse2D.Double(10.0, 10.0, 200.0, 100.0);
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setStroke(new BasicStroke(5));
        g2.setPaint(Color.white);
        g2.fill(myEllipse);
        g2.setPaint(Color.red);
        g2.draw(myEllipse);
    private void drawMyRect(Graphics g)
        Graphics2D g2 = (Graphics2D)g;
        Line2D line = new Line2D.Double(10, 10, 40, 40);
        g2.setColor(Color.blue);
        g2.setStroke(new BasicStroke(10));
        g2.draw(line);
        Rectangle2D rect = new Rectangle2D.Double(20, 20, 600, 400);
        g2.draw(rect);
        g2.setPaint(new GradientPaint(0, 0, Color.blue, 300, 200, Color.green, true));
        g2.fill(rect);
    public JPanel getMainPanel()
        return mainPanel;
}and the JApplet code:
import java.awt.Dimension;
import javax.swing.JApplet;
public class GraphicsEgApplet extends JApplet
    public void init()
        try
            javax.swing.SwingUtilities.invokeAndWait(new Runnable()
                public void run()
                    createGUI();
        catch (Exception e)
            System.err.println("createGUI didn't successfully complete");
    private void createGUI()
        getContentPane().add(new GraphicsEg2().getMainPanel());
        setSize(new Dimension(700, 600));
}Edited by: petes1234 on Feb 12, 2008 5:17 PM