java 绘制按钮_Java 重新绘制JButton

packagecom.han;importjava.awt.Color;importjava.awt.Container;importjava.awt.Dimension;importjava.awt.FlowLayout;importjava.awt.Font;importjava.awt.Graphics;importjava.awt.Graphics2D;importjava.awt.RadialGradientPaint;importjava.awt.RenderingHints;importjava.awt.Shape;importjava.awt.event.MouseAdapter;importjava.awt.event.MouseEvent;importjava.awt.font.LineMetrics;importjava.awt.geom.Ellipse2D;importjava.awt.geom.Point2D;importjava.awt.geom.Rectangle2D;importjava.awt.geom.RoundRectangle2D;importjava.awt.image.BufferedImage;importjava.io.IOException;importjavax.imageio.ImageIO;importjavax.swing.JButton;importjavax.swing.JFrame;importjavax.swing.UIManager;importjavax.swing.UIManager.LookAndFeelInfo;importjavax.swing.UnsupportedLookAndFeelException;

@SuppressWarnings("serial")public class JButton_Bg extendsJFrame {publicJButton_Bg() {for(LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) {if (laf.getName().equals("Nimbus")) {try{

UIManager.setLookAndFeel(laf.getClassName());

}catch (ClassNotFoundException |InstantiationException|IllegalAccessException|UnsupportedLookAndFeelException e) {//TODO Auto-generated catch block

e.printStackTrace();

}

}

}//TODO Auto-generated constructor stub

Container c =getContentPane();

c.setLayout(newFlowLayout());final JButton button = new MyButton("button 2");

c.add(button);

JButton button2= new JButton("button 2");

c.add(button2);

button2.setBackground(Color.blue);

JButton button3= new MyButton2("Cancel");

c.add(button3);//完全重绘的Button，其Text的HTML设置特性消失//JButton button4 = new//MyButton3("Sub");

JButton button4 = new MyButton3("Sub");//button4.setFont(new Font("Serif", Font.PLAIN, 14));

c.add(button4);

}private class MyButton extendsJButton {privateString text;private String state = "normal";//private String state = "focused";//private String state = "pressed";//private String state = "released";

Shape shape;//无参构造继承时自动调用，而有参构造继承时则需手动重写

MyButton(String text) {//super("" + text + "");

super(text);this.text =text;//下 面的代码块若是放到下面的paintComponent()方法里则Swing界面初始化时，//布局管理器还是采用的是系统默认的PreferredSize。因为构造函数要优先于//paintComponent()方法执行。

Dimension preferredSize =getPreferredSize();

Dimension preferredSizeNew= newDimension(preferredSize.width,

preferredSize.width);

setPreferredSize(preferredSizeNew);

}

@Overrideprotected voidpaintComponent(Graphics g) {

Graphics2D g2=(Graphics2D) g;

g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,

RenderingHints.VALUE_ANTIALIAS_ON);int width = this.getPreferredSize().width;int height = this.getPreferredSize().height;

BufferedImage img;try{

img= ImageIO.read(this.getClass().getResource("/images/icon.jpg"));

g2.drawImage(img,0, 0, width, height, this);

}catch(IOException e1) {//TODO Auto-generated catch block

e1.printStackTrace();

}if (state.equals("normal")) {//draw background pattern

Point2D center = new Point2D.Float(width / 2, height / 2);float radius = height / 2;float[] dist = { 0.0f, 1.0f};

Color[] colors= { new Color(0, 0, 0, 255),new Color(255, 255, 255, 0) };

RadialGradientPaint paint= newRadialGradientPaint(center,

radius, dist, colors);

g2.setPaint(paint);

shape= new Ellipse2D.Double(width / 2 - height / 2, 0, height,

height);

g2.fill(shape);//draw string text

g2.setColor(Color.RED);

Font defaultFont=getFont();

g2.setFont(defaultFont);

Rectangle2D rect=defaultFont.getStringBounds(text,

g2.getFontRenderContext());

LineMetrics lineMetrics=defaultFont.getLineMetrics(text,

g2.getFontRenderContext());

g2.drawString(

text,

(float) (width / 2 - rect.getWidth() / 2),

(float) ((height / 2) + ((lineMetrics.getAscent() +lineMetrics

.getDescent())/ 2 -lineMetrics.getDescent())));

}else if (state.equals("focused")) {//draw background pattern

Point2D center = new Point2D.Float(width / 2, height / 2);float radius = height / 2;float[] dist = { 0.2f, 1.0f};

Color[] colors= { new Color(0, 0, 0, 255),new Color(255, 255, 255, 0) };

RadialGradientPaint paint= newRadialGradientPaint(center,

radius, dist, colors);

g2.setPaint(paint);

g2.fill(new Ellipse2D.Double(width / 2 - height / 2, 0, height,

height));//draw string text

g2.setColor(Color.RED);

Font defaultFont=getFont();

g2.setFont(defaultFont);

Rectangle2D rect=defaultFont.getStringBounds(text,

g2.getFontRenderContext());

LineMetrics lineMetrics=defaultFont.getLineMetrics(text,

g2.getFontRenderContext());

g2.drawString(

text,

(float) (width / 2 - rect.getWidth() / 2),

(float) ((height / 2) + ((lineMetrics.getAscent() +lineMetrics

.getDescent())/ 2 -lineMetrics.getDescent())));

}else if (state.equals("pressed")) {//draw background pattern

int offsetCenter = 1;

Point2D center= new Point2D.Float(width / 2 +offsetCenter,

height/ 2 +offsetCenter);float radius = height / 2;float[] dist = { 0.2f, 1.0f};

Color[] colors= { new Color(0, 0, 0, 255),new Color(255, 255, 255, 0) };

RadialGradientPaint paint= newRadialGradientPaint(center,

radius, dist, colors);

g2.setPaint(paint);

g2.fill(new Ellipse2D.Double(width / 2 - height / 2

+offsetCenter, offsetCenter, height, height));//draw string text

g2.setColor(Color.RED);

Font defaultFont=getFont();

g2.setFont(defaultFont);

Rectangle2D rect=defaultFont.getStringBounds(text,

g2.getFontRenderContext());

LineMetrics lineMetrics=defaultFont.getLineMetrics(text,

g2.getFontRenderContext());

g2.drawString(

text,

(float) (width / 2 - rect.getWidth() / 2)+offsetCenter,

(float) ((height / 2) + ((lineMetrics.getAscent() +lineMetrics

.getDescent())/ 2 -lineMetrics.getDescent()))+offsetCenter);

}else if (state.equals("released")) {//draw background pattern

Point2D center = new Point2D.Float(width / 2, height / 2);float radius = height / 2;float[] dist = { 0.2f, 1.0f};

Color[] colors= { new Color(0, 0, 0, 255),new Color(255, 255, 255, 0) };

RadialGradientPaint paint= newRadialGradientPaint(center,

radius, dist, colors);

g2.setPaint(paint);

g2.fill(new Ellipse2D.Double(width / 2 - height / 2, 0, height,

height));//draw string text

g2.setColor(Color.RED);

Font defaultFont=getFont();

g2.setFont(defaultFont);

Rectangle2D rect=defaultFont.getStringBounds(text,

g2.getFontRenderContext());

LineMetrics lineMetrics=defaultFont.getLineMetrics(text,

g2.getFontRenderContext());

g2.drawString(

text,

(float) (width / 2 - rect.getWidth() / 2),

(float) ((height / 2) + ((lineMetrics.getAscent() +lineMetrics

.getDescent())/ 2 -lineMetrics.getDescent())));

}

addMouseListener(newMouseAdapter() {

@Overridepublic voidmouseEntered(MouseEvent e) {//TODO Auto-generated method stub

System.out.println("光标移入组件");

state= "focused";

repaint();

}

@Overridepublic voidmouseExited(MouseEvent e) {//TODO Auto-generated method stub

System.out.println("光标移出组件");

state= "normal";

repaint();

}

@Overridepublic voidmousePressed(MouseEvent e) {//TODO Auto-generated method stub

System.out.print("鼠标按键被按下，");

state= "pressed";

repaint();

}

@Overridepublic voidmouseReleased(MouseEvent e) {//TODO Auto-generated method stub

System.out.print("鼠标按键被释放，");

state= "released";

repaint();

}

});

}//Gives the UI delegate an opportunity to define the precise shape of//this component for the sake of mouse processing.

@Overridepublic boolean contains(int x, inty) {if(shape.contains(x, y)) {return true;

}else{return false;

}

}

}private class MyButton2 extendsJButton {privateString text;private String state = "normal";//private String state = "focused";//private String state = "pressed";//private String state = "released";

Shape shape;//Initialize the size of the button according to the length and width//of the text string

MyButton2(String text) {super(text);this.text =text;

}

@Overrideprotected voidpaintComponent(Graphics g) {

Graphics2D g2=(Graphics2D) g;

g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,

RenderingHints.VALUE_ANTIALIAS_ON);int width = this.getWidth();int height = this.getHeight();if (state.equals("normal")) {//draw background pattern

Point2D center = new Point2D.Float(width / 2, height / 2);float radius = width / 2;float[] dist = { 0.0f, 0.8f};

Color[] colors= { new Color(255, 255, 255, 0),new Color(0, 0, 0, 255) };

RadialGradientPaint paint= newRadialGradientPaint(center,

radius, dist, colors);

g2.setPaint(paint);

shape= new RoundRectangle2D.Double(0, 0, width, height,

height, height);

g2.fill(shape);//draw string text

Font defaultFont =getFont();

g2.setFont(defaultFont);

g2.setColor(Color.BLACK);

Rectangle2D rect=defaultFont.getStringBounds(text,

g2.getFontRenderContext());

LineMetrics lineMetrics=defaultFont.getLineMetrics(text,

g2.getFontRenderContext());

g2.drawString(

text,

(float) (width / 2 - rect.getWidth() / 2),

(float) ((height / 2) + ((lineMetrics.getAscent() +lineMetrics

.getDescent())/ 2 -lineMetrics.getDescent())));

}else if (state.equals("focused")) {//draw background pattern

Point2D center = new Point2D.Float(width / 2, height / 2);float radius = width / 2;float[] dist = { 0.0f, 0.8f};

Color[] colors= { new Color(255, 255, 255, 0),new Color(20, 20, 20, 255) };

RadialGradientPaint paint= newRadialGradientPaint(center,

radius, dist, colors);

g2.setPaint(paint);

g2.fill(new RoundRectangle2D.Double(0, 0, width, height,

height, height));//draw string text

Font defaultFont =getFont();

g2.setFont(defaultFont);

g2.setColor(Color.BLACK);

Rectangle2D rect=defaultFont.getStringBounds(text,

g2.getFontRenderContext());

LineMetrics lineMetrics=defaultFont.getLineMetrics(text,

g2.getFontRenderContext());

g2.drawString(

text,

(float) (width / 2 - rect.getWidth() / 2),

(float) ((height / 2) + ((lineMetrics.getAscent() +lineMetrics

.getDescent())/ 2 -lineMetrics.getDescent())));

}else if (state.equals("pressed")) {

Point2D center= new Point2D.Float(width / 2, height / 2);float radius = width / 2;float[] dist = { 0.0f, 1.0f};

Color[] colors= { new Color(255, 255, 255, 0),new Color(20, 20, 20, 255) };

RadialGradientPaint paint= newRadialGradientPaint(center,

radius, dist, colors);

g2.setPaint(paint);

g2.fill(new RoundRectangle2D.Double(0, 0, width, height,

height, height));//draw string text

Font defaultFont =getFont();

g2.setFont(defaultFont);

g2.setColor(Color.BLACK);

Rectangle2D rect=defaultFont.getStringBounds(text,

g2.getFontRenderContext());

LineMetrics lineMetrics=defaultFont.getLineMetrics(text,

g2.getFontRenderContext());

g2.drawString(

text,

(float) (width / 2 - rect.getWidth() / 2),

(float) ((height / 2) + ((lineMetrics.getAscent() +lineMetrics

.getDescent())/ 2 -lineMetrics.getDescent())));

}else if (state.equals("released")) {

Point2D center= new Point2D.Float(width / 2, height / 2);float radius = width / 2;float[] dist = { 0.0f, 0.8f};

Color[] colors= { new Color(255, 255, 255, 0),new Color(20, 20, 20, 255) };

RadialGradientPaint paint= newRadialGradientPaint(center,

radius, dist, colors);

g2.setPaint(paint);

g2.fill(new RoundRectangle2D.Double(0, 0, width, height,

height, height));//draw string text

Font defaultFont =getFont();

g2.setFont(defaultFont);

g2.setColor(Color.BLACK);

Rectangle2D rect=defaultFont.getStringBounds(text,

g2.getFontRenderContext());

LineMetrics lineMetrics=defaultFont.getLineMetrics(text,

g2.getFontRenderContext());

g2.drawString(

text,

(float) (width / 2 - rect.getWidth() / 2),

(float) ((height / 2) + ((lineMetrics.getAscent() +lineMetrics

.getDescent())/ 2 -lineMetrics.getDescent())));

}

addMouseListener(newMouseAdapter() {

@Overridepublic voidmouseEntered(MouseEvent e) {//TODO Auto-generated method stub

System.out.println("光标移入组件");

state= "focused";

repaint();

}

@Overridepublic voidmouseExited(MouseEvent e) {//TODO Auto-generated method stub

System.out.println("光标移出组件");

state= "normal";

repaint();

}

@Overridepublic voidmousePressed(MouseEvent e) {//TODO Auto-generated method stub

System.out.print("鼠标按键被按下，");

state= "pressed";

repaint();

}

@Overridepublic voidmouseReleased(MouseEvent e) {//TODO Auto-generated method stub

System.out.print("鼠标按键被释放，");

state= "released";

repaint();

}

});

}

@Overridepublic boolean contains(int x, inty) {if(shape.contains(x, y)) {return true;

}else{return false;

}

}

}private class MyButton3 extendsJButton {privateString text;private String state = "normal";//private String state = "focused";//private String state = "pressed";//private String state = "released";

Shape shape;//Initialize the size of the button according to the length and width//of the text string

MyButton3(String text) {super(text);this.text =text;

}

@Overrideprotected voidpaintComponent(Graphics g) {

Graphics2D g2=(Graphics2D) g;

g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,

RenderingHints.VALUE_ANTIALIAS_ON);int width = this.getWidth();int height = this.getHeight();if (state.equals("normal")) {

Point2D center= new Point2D.Float(width / 2, height / 2);float radius = width / 2;float[] dist = { 0.0f, 0.8f};

Color[] colors= { new Color(255, 255, 255, 0),new Color(0, 0, 0, 255) };

RadialGradientPaint paint= newRadialGradientPaint(center,

radius, dist, colors);

g2.setPaint(paint);

shape= new RoundRectangle2D.Double(0, 0, width, height,

height, height);

g2.fill(shape);//draw string text

Font defaultFont =getFont();

g2.setFont(defaultFont);

g2.setColor(Color.BLACK);

Rectangle2D rect=defaultFont.getStringBounds(text,

g2.getFontRenderContext());

LineMetrics lineMetrics=defaultFont.getLineMetrics(text,

g2.getFontRenderContext());

g2.drawString(

text,

(float) (width / 2 - rect.getWidth() / 2),

(float) ((height / 2) + ((lineMetrics.getAscent() +lineMetrics

.getDescent())/ 2 -lineMetrics.getDescent())));

}else if (state.equals("focused")) {

Point2D center= new Point2D.Float(width / 2, height / 2);float radius = width / 2;float[] dist = { 0.0f, 0.8f};

Color[] colors= { new Color(255, 255, 255, 0),new Color(20, 20, 20, 255) };

RadialGradientPaint paint= newRadialGradientPaint(center,

radius, dist, colors);

g2.setPaint(paint);

g2.fill(new RoundRectangle2D.Double(0, 0, width, height,

height, height));//draw string text

Font defaultFont =getFont();

g2.setFont(defaultFont);

g2.setColor(Color.BLACK);

Rectangle2D rect=defaultFont.getStringBounds(text,

g2.getFontRenderContext());

LineMetrics lineMetrics=defaultFont.getLineMetrics(text,

g2.getFontRenderContext());

g2.drawString(

text,

(float) (width / 2 - rect.getWidth() / 2),

(float) ((height / 2) + ((lineMetrics.getAscent() +lineMetrics

.getDescent())/ 2 -lineMetrics.getDescent())));

}else if (state.equals("pressed")) {

g2.setColor(new Color(0, 147, 255));

g2.fill(new RoundRectangle2D.Double(0, 0, width, height,

height, height));

Point2D center= new Point2D.Float(width / 2, height / 2);float radius = width / 2;float[] dist = { 0.0f, 1.0f};

Color[] colors= { new Color(255, 255, 255, 0),new Color(20, 20, 20, 255) };

RadialGradientPaint paint= newRadialGradientPaint(center,

radius, dist, colors);

g2.setPaint(paint);double borderWidth = 2.0f; //2 pixels

g2.fill(newRoundRectangle2D.Double(borderWidth, borderWidth,

width- borderWidth * 2.0f,

height- borderWidth * 2.0f, height -borderWidth* 2.0f, height - borderWidth * 2.0f));//draw string text

Font defaultFont =getFont();

g2.setFont(defaultFont);

g2.setColor(Color.BLACK);

Rectangle2D rect=defaultFont.getStringBounds(text,

g2.getFontRenderContext());

LineMetrics lineMetrics=defaultFont.getLineMetrics(text,

g2.getFontRenderContext());

g2.drawString(

text,

(float) (width / 2 - rect.getWidth() / 2),

(float) ((height / 2) + ((lineMetrics.getAscent() +lineMetrics

.getDescent())/ 2 -lineMetrics.getDescent())));

}else if (state.equals("released")) {

Point2D center= new Point2D.Float(width / 2, height / 2);float radius = width / 2;float[] dist = { 0.0f, 0.8f};

Color[] colors= { new Color(255, 255, 255, 0),new Color(20, 20, 20, 255) };

RadialGradientPaint paint= newRadialGradientPaint(center,

radius, dist, colors);

g2.setPaint(paint);

g2.fill(new RoundRectangle2D.Double(0, 0, width, height,

height, height));//draw string text

Font defaultFont =getFont();

g2.setFont(defaultFont);

g2.setColor(Color.BLACK);

Rectangle2D rect=defaultFont.getStringBounds(text,

g2.getFontRenderContext());

LineMetrics lineMetrics=defaultFont.getLineMetrics(text,

g2.getFontRenderContext());

g2.drawString(

text,

(float) (width / 2 - rect.getWidth() / 2),

(float) ((height / 2) + ((lineMetrics.getAscent() +lineMetrics

.getDescent())/ 2 -lineMetrics.getDescent())));

}

addMouseListener(newMouseAdapter() {

@Overridepublic voidmouseEntered(MouseEvent e) {//TODO Auto-generated method stub

System.out.println("光标移入组件");

state= "focused";

repaint();

}

@Overridepublic voidmouseExited(MouseEvent e) {//TODO Auto-generated method stub

System.out.println("光标移出组件");

state= "normal";

repaint();

}

@Overridepublic voidmousePressed(MouseEvent e) {//TODO Auto-generated method stub

System.out.print("鼠标按键被按下，");

state= "pressed";

repaint();

}

@Overridepublic voidmouseReleased(MouseEvent e) {//TODO Auto-generated method stub

System.out.print("鼠标按键被释放，");

state= "released";

repaint();

}

});

}

@Overridepublic boolean contains(int x, inty) {if(shape.contains(x, y)) {return true;

}else{return false;

}

}

}/***@paramargs*/

public static voidmain(String[] args) {//TODO Auto-generated method stub

JButton_Bg frame = newJButton_Bg();

frame.pack();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setVisible(true);

}

}