所以我有一個Java應用程序開發,我使用一個按鈕動作(當按鈕點擊),所謂的「退出」,我得到這個錯誤:錯誤的點擊與動作按鈕
illegal start of expresson at line 21
和這裏是代碼:
package apptutorial;
import javax.swing.*;
import java.awt.event.*;
public class AppDev extends JFrame {
public static void main(String[] args) {
JFrame myFrame = new JFrame();
String myTitle = "Alpha Application";
JButton button = new JButton("Exit");
myFrame.setTitle(myTitle);
myFrame.setSize(400, 300);
myFrame.setDefaultCloseOperation(EXIT_ON_CLOSE);
myFrame.setVisible(true);
myFrame.add(button);
button.setSize(100,50);
button.setVisible(true);
private void buttonActionPerformed(ActionEvent evt) {
System.exit(0);
}
}
}
你應該重讀[編寫事件監聽器(https://docs.oracle.com/javase/tutorial/uiswing/events/刪除
buttonActionPerformed
) – Codebender