Question

JAVA里Button按钮背景图片

我的写法都正确啊，在BUTTON的style样式里写出背景图片的高和宽以及图片。但不显现出按钮的背景图片呢？杂搞啊

Answer 1

何必要用java api的按钮呢，多不好看，自己写一个button

代码如下

package GUI;

import java.applet.Applet;
import java.applet.AudioClip;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Shape;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.Ellipse2D;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JPanel;

public class GameButton extends JButton {

/**
* 单人游戏的按钮
*/
public static final int SINGLE = 1;

/**
* 多人游戏按钮
*/
public static final int MULTI = 2;

/**
* 回放游戏的按钮
*/
public static final int REPLAY = 3;

/**
* 排行榜的按钮
*/
public static final int RECORD = 4;

/**
* 离开游戏的按钮
*/
public static final int EXIT = 5;

/**
* 新游戏的按钮
*/
public static final int NEW_GAME = 6;

/**
* 暂停游戏的按钮
*/
public static final int PAUSE_GAME = 7;

/**
* 继续游戏的按钮
*/
public static final int CONTINUE_GAME = 8;

/**
* 设置游戏的按钮
*/
public static final int SET_GAME = 9;

/**
* 返回的按钮
*/
public static final int BACK = 10;

/**
* 世界的按钮
*/
public static final int WORLD = 11;

/**
* 聊天的按钮
*/
public static final int TALK = 12;

/**
* 竞赛的按钮
*/
public static final int COMPETITION = 13;

/**
* 登陆的按钮
*/
public static final int LOGIN = 14;

/**
* 注册的按钮
*/
public static final int REGISTER = 15;

/**
* 保存游戏的按钮
*/
public static final int SAVE_FILE = 16;

/**
* 游戏回放的按钮
*/
public static final int GAME_REPLAY = 17;

/**
* 选择文件的按钮
*/
public static final int CHOOSE_FILE = 18;

/**
* 按钮的图片
*/
private Image[] gameButtonImage;

/**
* 侦测点击事件
*/
private Shape shape;

/**
* 按钮的类型；
*/
private int type;

/**
* 按钮状态
*/
private int state;

/**
* 进入按钮音效
*/
private AudioClip mouseEnterMusic;

/**
* 按下按钮的音效
*/
private AudioClip mousePressMusic;

/**
* 带参数的构造函数
*
* @param type
* 按钮的类型
*/
public GameButton(int type) {
this.type = type;
this.state = 0;

mouseEnterMusic = Applet.newAudioClip(getClass().getResource(
"/Audio/MouseEnter.wav"));

mousePressMusic = Applet.newAudioClip(getClass().getResource(
"/Audio/MousePress.wav"));

gameButtonImage = new Image[3];

for (int i = 0; i < gameButtonImage.length; i++) {
gameButtonImage[i] = new ImageIcon(this.getClass().getResource(
"/Image/Button/" + type + "-" + (i + 1) + ".png"))
.getImage();
}

this.addMouseListener(new MouseAdapter() {

@Override
public void mousePressed(MouseEvent arg0) {
state = 2;
repaint();
mousePressMusic.play();
}

@Override
public void mouseExited(MouseEvent arg0) {
state = 0;
repaint();
}

@Override
public void mouseEntered(MouseEvent arg0) {
state = 1;
repaint();
mouseEnterMusic.play();
}

public void mouseReleased(MouseEvent arg0) {
state = 1;
repaint();
}

});

this.setCursor(new Cursor(Cursor.HAND_CURSOR));

// 这些声明把按钮扩展为一个圆而不是一个椭圆。
Dimension size = getPreferredSize();
size.width = size.height = 3 * Math.max(size.width, size.height);
setPreferredSize(size);

// 这个调用使JButton不画背景，而允许我们画一个圆的背景。
setContentAreaFilled(false);
}

/**
* 如果按钮改变大小，产生一个新的形状对象。
*/
public boolean contains(int x, int y) {
if (shape == null || !shape.getBounds().equals(getBounds())) {
shape = new Ellipse2D.Float(0, 0, getWidth(), getHeight());
}
return shape.contains(x, y);
}

/**
* 重载JButton中的画方法
*/
protected void paintComponent(Graphics g) {
JPanel panel = new JPanel();
panel.setOpaque(false);
g.drawImage(gameButtonImage[state], 0, 0, getSize().width - 1,
getSize().height - 1, panel);
}

/**
* 重载按钮的边界，但是不画任何东西
*/
protected void paintBorder(Graphics g) {
}

/**
* 初始化按钮
*/
public void reInit() {
this.state = 0;
repaint();
}
}

你只需要把图片的路径改下，我这个按钮是圆形的按钮，还有音乐的添加哦，例如按按钮后会有声音，当然你也可以把按钮声音去掉，还有这个按钮可以控制大小，按钮时圆的还是方的，都是很容易控制的哦，呵呵

Answer 2

用setIcon()方法试试

Answer 3

说的不明白啊？

Answer 4

或许ButtonUI有用，但是从来没用过，LZ找找想相关的资料吧。