public class HelpMe{
GUI window = new GUI();
// Some code
public void MyFunction(){
//Some code
}
}
在GUI类中,我有一个按钮,其中有一个动作侦听器来执行某项操作(该部分可以工作),因此单击按钮时,我将运行MyFunction()
。那可能吗。还是我必须做一个接口并覆盖该功能或其他内容。预先谢谢你
好,我知道您想要的是这样的东西。
我使用了两种方法,一种是普通方法,另一种是使用lambda表达式。希望对您有所帮助。
package cl.lherrera;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Main {
public static void main(String[] args) {
//lambdaApproach();
statedApproach();
}
public static void externalMethod() {
System.out.println("KEY PRESSED !!");
}
public static void statedApproach() {
JFrame frame = new JFrame("Aplication name");
frame.setSize(500, 500);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
JButton myButton = new JButton("Push me");
panel.add(myButton);
frame.add(panel);
frame.setVisible(true);
ActionListener myEvent = new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
Main.externalMethod();
}
};
myButton.addActionListener(myEvent);
}
public static void lambdaApproach() {
JFrame frame = new JFrame("Aplication name");
frame.setSize(500, 500);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
JButton myButton = new JButton("Push me");
panel.add(myButton);
frame.add(panel);
frame.setVisible(true);
myButton.addActionListener((ActionEvent e) -> Main.externalMethod());
}
}