java - 如何使用退出代码 : Java 退出程序

Question

我有一个 Java 应用程序。我想指定我的控制台应用程序的“退出代码”。如何为 registerButton 应用退出代码？

final JTextField passwordText = new JTextField(20);
passwordText.setBounds(10, 120, 160, 25);
panel.add(passwordText);

JButton loginButton = new JButton("OK");
loginButton.setBounds(10, 150, 80, 25);
panel.add(loginButton);

JButton registerButton = new JButton("CANCEL");
registerButton.setBounds(180, 150, 80, 25);
panel.add(registerButton);

loginButton.addActionListener(new ActionListener() {

    @Override
    public void actionPerformed(ActionEvent actionEvent) {
        int i=Integer.parseInt(passwordText.getText());
        if(1<=i &&i<4) {
            JTextField xField1 = new JTextField(5);
            JTextField xField2 = new JTextField(5);
            JTextField xField3 = new JTextField(5);
            JTextField xField4 = new JTextField(5);

Answer 1

你可以使用 System.exit(0)

public static void exit(int status) Terminates the currently running Java Virtual Machine. The argument serves as a status code; by convention, a nonzero status code indicates abnormal termination. This method calls the exit method in class Runtime. This method never returns normally.

The call System.exit(n) is effectively equivalent to the call:

Runtime.getRuntime().exit(n) Parameters: status - exit status. Throws: SecurityException - if a security manager exists and its checkExit method doesn't allow exit with the specified status. See Also: Runtime.exit(int)