Java Reference
In-Depth Information
Example 11•8: LineStyles.java
package com.davidflanagan.examples.graphics;
import java.awt.*;
import java.awt.geom.*;
/** A demonstration of Java2D line styles */
public class LineStyles implements GraphicsExample {
public String getName() { return "LineStyles"; } // From GraphicsExample
public int getWidth() { return 450; }
// From GraphicsExample
public int getHeight() { return 180; }
// From GraphicsExample
int[] xpoints = new int[] { 0, 50, 100 }; // X coordinates of our shape
int[] ypoints = new int[] { 75, 0, 75 };
// Y coordinates of our shape
// Here are three different line styles we will demonstrate
// They are thick lines with different cap and join styles
Stroke[] linestyles = new Stroke[] {
new BasicStroke(25.0f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL),
new BasicStroke(25.0f, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_MITER),
new BasicStroke(25.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND),
};
// Another line style: a 2 pixel-wide dot-dashed line
Stroke thindashed = new BasicStroke(2.0f, // line width
/* cap style */
BasicStroke.CAP_BUTT,
/* join style, miter limit */
BasicStroke.JOIN_BEVEL, 1.0f,
/* the dash pattern */
new float[] {8.0f, 3.0f, 2.0f, 3.0f},
/* the dash phase */
0.0f); /* on 8, off 3, on 2, off 3 */
// Labels to appear in the diagram, and the font to use to display them.
Font font = new Font("Helvetica", Font.BOLD, 12);
String[] capNames = new String[] {"CAP_BUTT", "CAP_SQUARE","CAP_ROUND"};
String[] joinNames = new String[] {"JOIN_BEVEL","JOIN_MITER","JOIN_ROUND"};
/** This method draws the example figure */
public void draw(Graphics2D g, Component c) {
// Use anti-aliasing to avoid "jaggies" in the lines
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// Define the shape to draw
GeneralPath shape = new GeneralPath();
shape.moveTo(xpoints[0], ypoints[0]);
// start at point 0
shape.lineTo(xpoints[1], ypoints[1]);
// draw a line to point 1
shape.lineTo(xpoints[2], ypoints[2]);
// and then on to point 2
// Move the origin to the right and down, creating a margin
g.translate(20,40);
// Now loop, drawing our shape with the three different line styles
for(int i = 0; i < linestyles.length; i++) {
g.setColor(Color.gray); // Draw a gray line
g.setStroke(linestyles[i]); // Select the line style to use
g.draw(shape);
// Draw the shape
g.setColor(Color.black);
// Now use black
g.setStroke(thindashed);
// And the thin dashed line
g.draw(shape);
// And draw the shape again.
