corejava第8版

corejava第8版/v1ch09/TextComponentTest/TextComponentTest.java

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+import java.awt.*;
+import java.awt.event.*;
+import javax.swing.*;
+
+/**
+ * @version 1.40 2007-04-27
+ * @author Cay Horstmann
+ */
+public class TextComponentTest
+{
+   public static void main(String[] args)
+   {
+      EventQueue.invokeLater(new Runnable()
+         {
+            public void run()
+            {
+               TextComponentFrame frame = new TextComponentFrame();
+               frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+               frame.setVisible(true);
+            }
+         });
+   }
+}
+
+/**
+ * A frame with sample text components.
+ */
+class TextComponentFrame extends JFrame
+{
+   public TextComponentFrame()
+   {
+      setTitle("TextComponentTest");
+      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
+
+      final JTextField textField = new JTextField();
+      final JPasswordField passwordField = new JPasswordField();
+
+      JPanel northPanel = new JPanel();
+      northPanel.setLayout(new GridLayout(2, 2));
+      northPanel.add(new JLabel("User name: ", SwingConstants.RIGHT));
+      northPanel.add(textField);
+      northPanel.add(new JLabel("Password: ", SwingConstants.RIGHT));
+      northPanel.add(passwordField);
+
+      add(northPanel, BorderLayout.NORTH);
+
+      final JTextArea textArea = new JTextArea(8, 40);
+      JScrollPane scrollPane = new JScrollPane(textArea);
+
+      add(scrollPane, BorderLayout.CENTER);
+
+      // add button to append text into the text area
+
+      JPanel southPanel = new JPanel();
+
+      JButton insertButton = new JButton("Insert");
+      southPanel.add(insertButton);
+      insertButton.addActionListener(new ActionListener()
+         {
+            public void actionPerformed(ActionEvent event)
+            {
+               textArea.append("User name: " + textField.getText() + " Password: "
+                     + new String(passwordField.getPassword()) + "\n");
+            }
+         });
+
+      add(southPanel, BorderLayout.SOUTH);
+
+      // add a text area with scroll bars
+
+   }
+
+   public static final int DEFAULT_WIDTH = 300;
+   public static final int DEFAULT_HEIGHT = 300;
+}