我有这个代码,我正试图让一个动作监听器被使用,它被多次使用。我反复测试了这段代码,发现它只运行了一次actionperformed(当您单击“login”按钮时)
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class RyanOSGUI extends Frame implements ActionListener {
//Login
TextField password;
Label passwordLabel;
Button loginButton;
//Apps
Button console;
Button calendar;
//Calendar
TextArea calendarView = new TextArea();
Label addEvent = new Label("Add event to calendar: ");
Label eventNameLabel = new Label("Event Name: ");
TextField eventName = new TextField();
Label eventDateLabel = new Label("Event Date: ");
TextField eventDate = new TextField();
Label eventTimeLabel = new Label("Event Time: ");
TextField eventTime = new TextField();
Button submitEvent = new Button("Submit event");
RyanOSGUI(){
password = new TextField();
password.setBounds(175,90,100,20);
passwordLabel = new Label("Enter Password:");
passwordLabel.setBounds(175, 50, 100, 30);
loginButton = new Button("Login");
loginButton.setBounds(175, 140, 100, 30);
loginButton.addActionListener(this);
calendar = new Button("Calendar");
calendar.setBounds(50,50,83,30);
console = new Button("Console");
console.setBounds(183,50,83,30);
add(password);
add(passwordLabel);
add(loginButton);
add(console);
add(calendar);
console.setVisible(false);
calendar.setVisible(false);
setResizable(false);
setSize(450,500);
setLayout(null);
setVisible(true);
setTitle("RyanOS");
setIconImage(Toolkit.getDefaultToolkit().getImage("D:\\Users\\rperg\\Pictures\\Camera Roll\\RyanOS.png"));
}
public void actionPerformed(ActionEvent a){
//actionPerformed is only running once
System.out.println("Ran action event");
System.out.println(calendar);
if(a.getSource() == loginButton){
if(password.getText().equals("Testing123")){
passwordLabel.setText("Welcome, Ryan!");
setTitle("Ryan OS Home Screen");
password.setVisible(false);
passwordLabel.setVisible(false);
loginButton.setVisible(false);
console.setVisible(true);
calendar.setVisible(true);
}
else{
passwordLabel.setText("Wrong Password, Terminating program...");
System.exit(69);
}
}
if(a.getSource() == calendar){
System.out.println("Ran Calendar App");
console.setVisible(false);
calendar.setVisible(false);
runCalendar();
}
}
public void runCalendar(){
//Positioning
calendarView.setBounds(10,10,430,300);
addEvent.setBounds(10,310,100,30);
eventNameLabel.setBounds(10,350,100,30);
eventName.setBounds(110,350,100,20);
eventDateLabel.setBounds(10, 380, 100, 30);
eventDate.setBounds(110,380,100,20);
eventTimeLabel.setBounds(10,410,100,30);
eventTime.setBounds(110,410,100,20);
submitEvent.setBounds(230, 375,100,30);
//Adding to scene
add(calendarView);
add(addEvent);
add(eventNameLabel);
add(eventName);
add(eventDateLabel);
add(eventDate);
add(eventTimeLabel);
add(eventTime);
add(submitEvent);
}
public static void main(String[] args){
RyanOSGUI ros = new RyanOSGUI();
}
}
class CalendarApp implements ActionListener {
public void actionPerformed(ActionEvent a){
}
}
有没有一种方法可以修复这个问题,以便可以重复使用actionperformed方法?我试过用不同的方法来做动作听众,但我似乎不能让他们正确(他们会返回错误)
1条答案
按热度按时间3gtaxfhh1#
它只运行一次actionperformed(当您单击“login”按钮时)
你只能把它添加到“登录”按钮。
您还需要将它添加到其他按钮中。
然而,共享actionlistener并不是一个好的设计。侦听器应该只执行一个函数。
我试过用不同的方法让动作听众听
是的,为每个按钮创建一个唯一的actionlistener是更好的方法。
例如: