我有一个Java程序,它从浏览器启动,运行各种java.awt.Button按钮。点击后,没关系。但是当按下与该按钮对应的按键时,Windows会发出“默认蜂鸣声”。
按钮的创建方式如下:
import java.awt.GridLayout;
import java.awt.BorderLayout;
import java.io.*;
import java.awt.Panel;
import java.awt.Button;
import java.awt.Font;
import java.awt.event.*;
import java.lang.Integer;
public class buttonPne extends Panel implements ActionListener, constants {
private pClient parent = null;
private labelPne buttonLabel[] = new labelPne[8];
private Panel buttonPanel[] = new Panel[8];
public Button theButtons[] = new Button[8];
private boolean buttonStatus[] = new boolean[8];
public buttonPne(pClient c) {
parent = c;
this.setLayout(new GridLayout(1, 8, 1, 0));
for (int i = 0; i < 8; i++) {
buttonLabel[i] = new labelPne(parent);
buttonLabel[i].setSize(9, 9);
theButtons[i] = new Button();
theButtons[i].setFont(ButtonFont);
theButtons[i].setActionCommand(Integer.toString(i));
theButtons[i].addActionListener(this);
theButtons[i].addKeyListener(parent);
buttonPanel[i] = new Panel();
buttonPanel[i].setBackground(backgroundColor);
buttonPanel[i].setLayout(new BorderLayout());
buttonPanel[i].add("North", theButtons[i]);
buttonPanel[i].add("South", buttonLabel[i]);
this.add(buttonPanel[i]);
}
Deactivate();
}
按键操作如下:
import java.awt.event.KeyEvent;
...
public class pClient extends Applet implements KeyListener, constants {
...
f.addKeyListener(this);
...
public void keyPressed(KeyEvent evt) {
int theKey;
theKey = evt.getKeyCode();
switch(theKey) {
case KeyEvent.VK_1:
case KeyEvent.VK_F1:
buttons.DoButton(0);
break;
...
public void DoButton(int theNumber) {
if (buttonStatus[theNumber]) {
if (parent.pollSendFlag(BUTTONS)) {
parent.chat.takeFocus();
parent.compass.Deactivate();
Deactivate();
}
}
return;
}
如何在按键时停止发出默认蜂鸣声?
答案 0 :(得分:0)
使用Swing组件代替AWT组件。