http://i415.photobucket.com/albums/pp235/wong93_photos/Untitled-3.png
哟伙计们我在这里几乎没有问题,在我问之前,我想要用这个程序做的是计算已经按下的切换次数,并将jTextField中的总数设置为“数量”。 例如,我按下A和B切换按钮,因此数量将显示2,jLabel7将显示20
1)如何计算已按下的切换次数?我无法在任何地方找到这个
2)如何在jTextField中输入值?我知道这是基本的,但我不知道如何,我搜索周围,所有这些都是关于从文本字段检索信息而不是插入
3)如何将jLabel7中的值传递给我的其他jFrame?因为我想用它作为收据,例如:总费用是20
非常感谢!
答案 0 :(得分:2)
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class Example extends JPanel {
private static final long serialVersionUID = 1L;
private int toggle_count = 0;
private JTextField text_field;
private JLabel label;
public Example() {
this.setLayout(new FlowLayout());
JButton button_a = new JButton("Button A");
this.add(button_a);
JButton button_b = new JButton("Button B");
this.add(button_b);
text_field = new JTextField("0");
text_field.setPreferredSize(new Dimension(50, 20));
text_field.setEditable(false);
this.add(text_field);
label = new JLabel("x 10 = 0");
this.add(label);
button_a.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
updateToggle();
}
});
button_b.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
updateToggle();
}
});
JButton receipt = new JButton("Receipt");
this.add(receipt);
receipt.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
SomeClass.main(toggle_count*10);
}
});
}
public void updateToggle() {
toggle_count++;
text_field.setText("" +toggle_count);
label.setText("x 10 = " + toggle_count * 10);
}
public static void main(String[] args) {
JFrame frame = new JFrame("Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(640, 480);
frame.setLocationRelativeTo(null);
frame.setResizable(false);
frame.setContentPane(new Example());
frame.setVisible(true);
}
}
SomeClass是另一个带有main方法的类,它将toggle_count * 10作为参数