解析super("删除学生住宿信息"); setLayout(new FlowLayout()); label1 = new JLabel("请输入学生姓名："); add(label1); textField = new JTextField(10); add(textField); button = new JButton("删除"); add(button); label2 = new JLabel(""); add(label2); button.addActionListener(this); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setSize(300, 150); setVisible(true);

这是一个 Java 的 GUI 程序，表示一个窗口，它的标题为 "删除学生住宿信息"。使用了 FlowLayout 的布局管理器，将组件添加到窗口中。组件包括一个标签 label1，一个文本框 textField，一个按钮 button，以及另一个标签 label2。其中，label1 显示 "请输入学生姓名："，textField 是一个长度为 10 的文本框，button 显示 "删除"，label2 初始为空。按钮 button 添加了一个监听器，当用户点击按钮时，会调用实现了 ActionListener 接口的类的 actionPerformed 方法。setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE) 表示当用户关闭窗口时，程序会退出。setSize(300, 150) 设置窗口大小为 300x150 像素。setVisible(true) 表示将窗口设置为可见。

相关问题

import javax.swing.*; import java.awt.*; import java.awt.event.*; public class TextEncryptor extends JFrame implements ActionListener { private JLabel label; private JTextField inputText; private JButton encryptButton, decryptButton; private JTextArea outputText; public TextEncryptor() { super("Text Encryptor"); setLayout(new FlowLayout()); label = new JLabel("Enter text:"); add(label); inputText = new JTextField(20); add(inputText); encryptButton = new JButton("Encrypt"); add(encryptButton); encryptButton.addActionListener(this); decryptButton = new JButton("Decrypt"); add(decryptButton); decryptButton.addActionListener(this); outputText = new JTextArea(10, 20); add(outputText); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setSize(300, 300); setVisible(true); } public void actionPerformed(ActionEvent e) { if (e.getSource() == encryptButton) { String input = inputText.getText(); String output = encrypt(input); outputText.setText(output); } else if (e.getSource() == decryptButton) { String input = inputText.getText(); String output = decrypt(input); outputText.setText(output); } } public static void main(String[] args) { new TextEncryptor(); } private String encrypt(String text) { // TODO: 实现加密算法 return text; } private String decrypt(String text) { // TODO: 实现解密算法 return text; } }这段代码使用了什么java基础知识

上述代码运用了以下Java基础知识：

1. GUI编程：使用了Java Swing库创建了一个窗口，其中包括标签、文本框、按钮和文本区域等组件

2. 事件处理：实现了ActionListener接口，对加密和解密按钮的点击事件进行了处理

3. 字符串处理：对用户输入的文本进行字符串的获取和处理，同时实现了加密和解密算法

4. 面向对象编程：使用了面向对象的思想，将加密和解密算法封装在类的私有方法中，提高了程序的可重用性和可维护性

5. 异常处理：未在代码中显式处理异常，但是后续的开发过程中需要注意异常的处理，以保障程序的健壮性。

帮我根据以下要求：Then modify the View superclass to:  hide the frame when the user clicks on the “close” button;  add a “window closing” event handler (use an anonymous window adapter) that calls the controller’s shutdown method.修改下述代码：import javax.swing.JFrame; public abstract class View<T extends Controller> extends JFrame implements ModelListener { protected Model m; protected T c; public View(Model m, T c) { this.m = m; this.c = c; m.addListener(this); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } @Override public abstract void update(); }，public class MyFrame extends View<ControllerClicks> { public MyFrame(Model m, ControllerClicks c) { super(m, c); this.setTitle("MyFrame Title"); this.setSize(400, 300); this.setLocationRelativeTo(null); this.setLayout(new BorderLayout()); MyPanel centerPanel = new MyPanel(m, c); this.add(centerPanel, BorderLayout.CENTER); JPanel topPanel = new JPanel(); this.add(topPanel, BorderLayout.PAGE_START); topPanel.setLayout(new FlowLayout(FlowLayout.CENTER)); JButton resetButton = new JButton("Reset"); resetButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { c.resetClicked(); } }); topPanel.add(resetButton); JButton undoButton = new JButton("Undo"); undoButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { c.undoClicked(); } }); topPanel.add(undoButton); this.setVisible(true); } @Override public void update() { repaint(); // Makes Swing call MyPanel's paintComponent method. } } import javax.swing.JLabel; public class ViewNumber extends View<Controller> { private JLabel label; public ViewNumber(Model m, Controller c) { super(m, c); this.setTitle("View Number"); this.setSize(150, 150); label = new JLabel(); update(); // Initialize the label using the model. this.add(label); this.setVisible(true); } @Override public void update() { label.setText("Number of points is: " + m.numberOfPoints()); } }

修改后的代码如下：

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public abstract class View<T extends Controller> extends JFrame implements ModelListener {
protected Model m;
protected T c;

public View(Model m, T c) {
this.m = m;
this.c = c;
m.addListener(this);
this.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
this.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
c.shutdown();
}
});
}

@Override
public abstract void update();
}

public class MyFrame extends View<ControllerClicks> {
public MyFrame(Model m, ControllerClicks c) {
super(m, c);
this.setTitle("MyFrame Title");
this.setSize(400, 300);
this.setLocationRelativeTo(null);
this.setLayout(new BorderLayout());
MyPanel centerPanel = new MyPanel(m, c);
this.add(centerPanel, BorderLayout.CENTER);
JPanel topPanel = new JPanel();
this.add(topPanel, BorderLayout.PAGE_START);
topPanel.setLayout(new FlowLayout(FlowLayout.CENTER));
JButton resetButton = new JButton("Reset");
resetButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
c.resetClicked();
}
});
topPanel.add(resetButton);
JButton undoButton = new JButton("Undo");
undoButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
c.undoClicked();
}
});
topPanel.add(undoButton);
this.setVisible(true);
}

@Override
public void update() {
repaint(); // Makes Swing call MyPanel's paintComponent method.
}
}

import javax.swing.JLabel;

public class ViewNumber extends View<Controller> {
private JLabel label;

public ViewNumber(Model m, Controller c) {
super(m, c);
this.setTitle("View Number");
this.setSize(150, 150);
label = new JLabel();
update(); // Initialize the label using the model.
this.add(label);
this.setVisible(true);
}

@Override
public void update() {
label.setText("Number of points is: " + m.numberOfPoints());
}
}