如何在ActionListener中退出方法

我有一个连接到JTextField的ActionListener ，并希望键入一些东西，以便它将退出ActionListener所在的方法。

码：

 main() { Security(x,x,x); } public void Security(JTextArea out, JTextField in) { in.setText(""); in.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae) { if (in.getText().contains("exitsys")) { out.append("Security:Security System Deactivated\n"); return; } in.setText(""); } }); out.append("Security:Security System Activated\n"); fileWrite(":SYSTEM_INITIATED@" + time(), out); } 

我想键入"exitsys"并返回主类方法"main()" 。

fileWrite方法使用PrintWriter输出数据。

问题摘要：我试着打电话回来; 但它没有返回方法main（），我该如何解决这个问题？

Answer 1

基本上你需要的是某种modal dialog，这将允许你有效地停止程序的执行，直到对话框被解除（关闭），执行将继续…

 import java.awt.EventQueue; import java.awt.GridBagLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JDialog; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextField; import javax.swing.SwingUtilities; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; public class Test { public static void main(String[] args) { new Test(); } public Test() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { ex.printStackTrace(); } JDialog dialog = new JDialog(); dialog.setTitle("Testing"); dialog.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); dialog.add(new TestPane()); dialog.pack(); dialog.setLocationRelativeTo(null); dialog.setVisible(true); System.out.println("Now back in the main..."); } }); } public class TestPane extends JPanel { private JTextField field; public TestPane() { setLayout(new GridBagLayout()); field = new JTextField(10); field.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { if ("exitsys".equals(field.getText())) { SwingUtilities.getWindowAncestor(field).dispose(); } } }); add(field); } } } 

有关更多详细信息，请参见如何创建对话框