public RoundButton(String label) { super(label); // These statements enlarge the button so that it // becomes a circle rather than an oval. Dimension size = getPreferredSize(); // size.width = size.height = Math.max(size.width, size.height); setPreferredSize(size); // This call causes the JButton not to paint the background. // This allows us to paint a round background. setContentAreaFilled(false); } // Paint the round background and label. protected void paintComponent(Graphics g) { if (getModel().isArmed()) { // You might want to make the highlight color // a property of the RoundButton class. g.setColor(Color.lightGray); } else { g.setColor(getBackground()); } g.fillOval(0, 0, getSize().width-1, getSize().height-1); // This call will paint the label and the focus rectangle. super.paintComponent(g); } // Paint the border of the button using a simple stroke. protected void paintBorder(Graphics g) { g.setColor(getForeground()); g.drawOval(0, 0, getSize().width-1, getSize().height-1); } // Hit detection. Shape shape; public boolean contains(int x, int y) { // If the button has changed size, make a new shape object. if (shape == null || !shape.getBounds().equals(getBounds())) { shape = new Ellipse2D.Float(0, 0, getWidth(), getHeight()); } return shape.contains(x, y); }
// Test routine. public static void main(String[] args) { // Create a button with the label. JButton button = new RoundButton("圆形按钮"); JButton b2; ImageIcon ic; button.setBackground(Color.green);
// Create a frame in which to show the button. ic = new ImageIcon("Red.GIF"); b2=new JButton(ic); JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().setBackground(Color.yellow); frame.getContentPane().add(button); frame.getContentPane().setLayout(new FlowLayout()); frame.getContentPane().add(b2); frame.setSize(300, 200); frame.setVisible(true); } }
import java.awt.*; import java.awt.geom.*; import javax.swing.*; import java.net.*;public class RoundButton extends JButton { public RoundButton(String label) { super(label); Dimension size = getPreferredSize(); setPreferredSize(size); setContentAreaFilled(false); } protected void paintComponent(Graphics g) { System.out.println("paint componet"); if (getModel().isArmed()) { System.out.println("true"); g.setColor(getBackground().darker()); } else { g.setColor(getBackground()); } int w = getSize().width; int h = getSize().height; int d = 50; int r = d / 2; g.fillArc(0,0,d,d,180,-90); g.fillArc(w - d - 2, 0, d, d, 0, 90); g.fillRect(r,0,w-d,r); g.fillRect(0,r,w,h-r); // This call will paint the label and the focus rectangle. super.paintComponent(g); } protected void paintBorder(Graphics g) { int w = getSize().width; int h = getSize().height; int d = 50; int r = d / 2; g.setColor(this.getBackground().brighter()); g.drawLine(1, r, 1, h); g.drawArc(1, 1, d, d, 180, -90); g.drawLine(r, 1, w - r, 1); g.drawArc(w - d - 1, 1, d, d, 0, 90); g.drawLine(w - 1, r, w - 1, h); g.drawLine(0, h - 1, w - 1, h - 1); g.setColor(this.getBackground().darker()); g.drawLine(0, r, 0, h - 2); g.drawArc(0, 0, d, d, 180, -90); g.drawLine(r, 0, w - r, 0); g.drawArc(w - d - 2, 0, d, d, 0, 90); g.drawLine(w - 2, r, w - 2, h - 2); g.drawLine(0, h - 2, w - 2, h - 2); } public static void main(String[] args) { JButton button = new RoundButton("圆形按钮"); JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().add(button); frame.setTitle("round button"); frame.getContentPane().setLayout(new FlowLayout()); frame.setSize(300, 200); frame.setVisible(true); frame.setTitle("123"); }// // Hit detection. // Shape shape; // public boolean contains(int x, int y) // { // System.out.println("contains"); // // If the button has changed size, make a new shape object. // if (shape == null || !shape.getBounds().equals(getBounds())) // { // shape = new Ellipse2D.Float(0, 0, getWidth(), getHeight()); // } // return shape.contains(x, y); // }}
import java.awt.geom.*;
import javax.swing.*;
import java.net.*;public class RoundButton extends JButton {
public RoundButton(String label) {
super(label); // These statements enlarge the button so that it
// becomes a circle rather than an oval.
Dimension size = getPreferredSize();
// size.width = size.height = Math.max(size.width, size.height);
setPreferredSize(size); // This call causes the JButton not to paint the background.
// This allows us to paint a round background.
setContentAreaFilled(false);
} // Paint the round background and label.
protected void paintComponent(Graphics g) {
if (getModel().isArmed()) {
// You might want to make the highlight color
// a property of the RoundButton class.
g.setColor(Color.lightGray);
} else {
g.setColor(getBackground());
}
g.fillOval(0, 0, getSize().width-1, getSize().height-1); // This call will paint the label and the focus rectangle.
super.paintComponent(g);
} // Paint the border of the button using a simple stroke.
protected void paintBorder(Graphics g) {
g.setColor(getForeground());
g.drawOval(0, 0, getSize().width-1, getSize().height-1);
} // Hit detection.
Shape shape;
public boolean contains(int x, int y) {
// If the button has changed size, make a new shape object.
if (shape == null || !shape.getBounds().equals(getBounds())) {
shape = new Ellipse2D.Float(0, 0, getWidth(), getHeight());
}
return shape.contains(x, y);
}
// Test routine.
public static void main(String[] args) {
// Create a button with the label.
JButton button = new RoundButton("圆形按钮");
JButton b2;
ImageIcon ic;
button.setBackground(Color.green);
// Create a frame in which to show the button.
ic = new ImageIcon("Red.GIF");
b2=new JButton(ic);
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setBackground(Color.yellow);
frame.getContentPane().add(button);
frame.getContentPane().setLayout(new FlowLayout());
frame.getContentPane().add(b2);
frame.setSize(300, 200);
frame.setVisible(true);
}
}
import java.awt.geom.*;
import javax.swing.*;
import java.net.*;public class RoundButton
extends JButton
{ public RoundButton(String label)
{
super(label);
Dimension size = getPreferredSize();
setPreferredSize(size);
setContentAreaFilled(false);
} protected void paintComponent(Graphics g)
{
System.out.println("paint componet");
if (getModel().isArmed())
{
System.out.println("true");
g.setColor(getBackground().darker());
}
else
{
g.setColor(getBackground());
} int w = getSize().width;
int h = getSize().height;
int d = 50;
int r = d / 2; g.fillArc(0,0,d,d,180,-90);
g.fillArc(w - d - 2, 0, d, d, 0, 90);
g.fillRect(r,0,w-d,r);
g.fillRect(0,r,w,h-r);
// This call will paint the label and the focus rectangle.
super.paintComponent(g);
} protected void paintBorder(Graphics g)
{
int w = getSize().width;
int h = getSize().height;
int d = 50;
int r = d / 2; g.setColor(this.getBackground().brighter());
g.drawLine(1, r, 1, h);
g.drawArc(1, 1, d, d, 180, -90);
g.drawLine(r, 1, w - r, 1);
g.drawArc(w - d - 1, 1, d, d, 0, 90);
g.drawLine(w - 1, r, w - 1, h);
g.drawLine(0, h - 1, w - 1, h - 1); g.setColor(this.getBackground().darker());
g.drawLine(0, r, 0, h - 2);
g.drawArc(0, 0, d, d, 180, -90);
g.drawLine(r, 0, w - r, 0);
g.drawArc(w - d - 2, 0, d, d, 0, 90);
g.drawLine(w - 2, r, w - 2, h - 2);
g.drawLine(0, h - 2, w - 2, h - 2);
}
public static void main(String[] args)
{
JButton button = new RoundButton("圆形按钮"); JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(button);
frame.setTitle("round button");
frame.getContentPane().setLayout(new FlowLayout());
frame.setSize(300, 200);
frame.setVisible(true);
frame.setTitle("123"); }// // Hit detection.
// Shape shape;
// public boolean contains(int x, int y)
// {
// System.out.println("contains");
// // If the button has changed size, make a new shape object.
// if (shape == null || !shape.getBounds().equals(getBounds()))
// {
// shape = new Ellipse2D.Float(0, 0, getWidth(), getHeight());
// }
// return shape.contains(x, y);
// }}
必须修改 jbutton的外观 paint方法了,不过,本人是画一张带圆弧的button图片,贴在
jbutton上的。