美好的一天!
我正在制作一个出勤检查程序,点击一次显示橙色按钮,红色按钮,两次点击,黑色按钮为3.我有关于如何积累getClickCount()的问题值,因为按钮注册3次点击,按钮必须快速点击3次。
这是代码
button1.addMouseListener(new MouseAdapter(){
public void mousePressed(MouseEvent a){
if (a.getClickCount() == 1){
button1.setBackground(Color.ORANGE);
}
else if (a.getClickCount() == 2){
button1.setBackground(Color.RED);
}
else if (a.getClickCount() == 3){
button1.setBackground(Color.BLACK);
}
}
});
frame.setVisible(true);
frame.pack();
}
}
答案 0 :(得分:1)
如果我理解正确,基本上你想在每次按下按钮时改变颜色,这取决于按钮之前被按下的次数。
MouseListener
不是JButton
的不错选择,因为键盘可以激活按钮(通过快捷方式或焦点活动),而且可以通过编程方式激活MouseListener
无法检测到的按钮
相反,您应该使用ActionListener
此示例将在每次单击按钮时更改颜色。我使用了一组Color
来简化生活,但是一般概念应该适用于if-else
语句,你只需要在计数器达到极限时重置它
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class ButtonClicker {
public static void main(String[] args) {
new ButtonClicker();
}
public ButtonClicker() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public static class TestPane extends JPanel {
private static final Color[] COLORS = new Color[]{Color.ORANGE, Color.RED, Color.BLACK};
private int clickCount;
public TestPane() {
setLayout(new GridBagLayout());
JButton clicker = new JButton("Color Changer");
clicker.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
clickCount++;
setBackground(COLORS[Math.abs(clickCount % COLORS.length)]);
}
});
setBackground(COLORS[clickCount]);
add(clicker);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
}
}
请查看How to Use Buttons, Check Boxes, and Radio Buttons和How to Write an Action Listeners了解详情
答案 1 :(得分:0)
第1步:创建自己的MouseListener
课程。在这种情况下,我选择创建一个扩展MouseAdapter
的外部类。
public class MyMouseListener extends MouseAdapter
{
public void mousePressed(MouseEvent event)
{
Object obj = event.getSource();
if (obj instanceof JButton)
{
if JButton btn = (JButton)obj;
if (a.getClickCount() == 1)
{
btn.setBackground(Color.ORANGE);
}
else if (a.getClickCount() == 2)
{
btn.setBackground(Color.RED);
}
else if (a.getClickCount() == 3)
{
btn.setBackground(Color.BLACK);
}
}
}
}
第2步:为每个按钮添加此侦听器的独立实例
button1.addMouseListener(new MyMouseListener());
button2.addMouseListener(new MyMouseListener());
button3.addMouseListener(new MyMouseListener());
button4.addMouseListener(new MyMouseListener());
button5.addMouseListener(new MyMouseListener());
button6.addMouseListener(new MyMouseListener());
button7.addMouseListener(new MyMouseListener());
button8.addMouseListener(new MyMouseListener());
button9.addMouseListener(new MyMouseListener());
button10.addMouseListener(new MyMouseListener());
button11.addMouseListener(new MyMouseListener());
button12.addMouseListener(new MyMouseListener());
这对你有用。但是,正如我所提到的,这可行,但不是很好。