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corejava第7版
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‎corejava第7版/v1/com/horstmann/Format.java‎

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‎corejava第7版/v1/gutenberg/alice30.txt‎

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‎corejava第7版/v1/v1ch10/AppletApplication/AppletFrame.java‎

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/**
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@version 1.31 2004-05-07
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@author Cay Horstmann
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*/
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import java.awt.*;
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import java.awt.event.*;
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import java.applet.*;
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import java.io.*;
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import java.net.*;
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import java.util.*;
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import javax.swing.*;
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public class AppletFrame extends JFrame
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implements AppletStub, AppletContext
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{
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public AppletFrame(Applet anApplet)
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{
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applet = anApplet;
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add(applet);
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applet.setStub(this);
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}
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public void setVisible(boolean b)
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{
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if (b)
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{
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applet.init();
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super.setVisible(true);
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applet.start();
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}
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else
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{
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applet.stop();
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super.setVisible(false);
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applet.destroy();
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}
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}
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// AppletStub methods
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public boolean isActive() { return true; }
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public URL getDocumentBase() { return null; }
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public URL getCodeBase() { return null; }
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public String getParameter(String name) { return ""; }
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public AppletContext getAppletContext() { return this; }
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public void appletResize(int width, int height) {}
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// AppletContext methods
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public AudioClip getAudioClip(URL url) { return null; }
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public Image getImage(URL url) { return null; }
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public Applet getApplet(String name) { return null; }
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public Enumeration getApplets() { return null; }
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public void showDocument(URL url) {}
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public void showDocument(URL url, String target) {}
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public void showStatus(String status) {}
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public void setStream(String key, InputStream stream) {}
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public InputStream getStream(String key) { return null; }
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public Iterator getStreamKeys() { return null; }
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private Applet applet;
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}
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‎corejava第7版/v1/v1ch10/AppletApplication/CalculatorApplet.java‎

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/**
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@version 1.31 2004-05-07
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@author Cay Horstmann
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*/
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import java.awt.*;
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import java.awt.event.*;
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import javax.swing.*;
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public class CalculatorApplet extends JApplet
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{
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public void init()
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{
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add(new CalculatorPanel());
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}
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}
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/**
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A panel with calculator buttons and a result display.
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*/
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class CalculatorPanel extends JPanel
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{
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public CalculatorPanel()
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{
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setLayout(new BorderLayout());
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result = 0;
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lastCommand = "=";
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start = true;
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// add the display
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display = new JLabel("0");
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add(display, BorderLayout.NORTH);
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ActionListener insert = new InsertAction();
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ActionListener command = new CommandAction();
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// add the buttons in a 4 x 4 grid
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panel = new JPanel();
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panel.setLayout(new GridLayout(4, 4));
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addButton("7", insert);
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addButton("8", insert);
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addButton("9", insert);
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addButton("/", command);
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addButton("4", insert);
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addButton("5", insert);
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addButton("6", insert);
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addButton("*", command);
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addButton("1", insert);
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addButton("2", insert);
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addButton("3", insert);
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addButton("-", command);
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addButton("0", insert);
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addButton(".", insert);
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addButton("=", command);
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addButton("+", command);
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add(panel, BorderLayout.CENTER);
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}
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/**
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Adds a button to the center panel.
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@param label the button label
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@param listener the button listener
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*/
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private void addButton(String label, ActionListener listener)
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{
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JButton button = new JButton(label);
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button.addActionListener(listener);
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panel.add(button);
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}
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/**
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This action inserts the button action string to the
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end of the display text.
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*/
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private class InsertAction implements ActionListener
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{
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public void actionPerformed(ActionEvent event)
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{
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String input = event.getActionCommand();
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if (start)
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{
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display.setText("");
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start = false;
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}
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display.setText(display.getText() + input);
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}
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}
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/**
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This action executes the command that the button
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action string denotes.
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*/
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private class CommandAction implements ActionListener
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{
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public void actionPerformed(ActionEvent event)
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{
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String command = event.getActionCommand();
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if (start)
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{
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if (command.equals("-"))
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{
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display.setText(command);
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start = false;
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}
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else
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lastCommand = command;
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}
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else
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{
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calculate(Double.parseDouble(display.getText()));
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lastCommand = command;
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start = true;
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}
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}
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}
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/**
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Carries out the pending calculation.
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@param x the value to be accumulated with the prior result.
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*/
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public void calculate(double x)
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{
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if (lastCommand.equals("+")) result += x;
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else if (lastCommand.equals("-")) result -= x;
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else if (lastCommand.equals("*")) result *= x;
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else if (lastCommand.equals("/")) result /= x;
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else if (lastCommand.equals("=")) result = x;
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display.setText("" + result);
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}
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private JLabel display;
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private JPanel panel;
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private double result;
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private String lastCommand;
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private boolean start;
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}
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‎corejava第7版/v1/v1ch10/AppletApplication/CalculatorAppletApplication.html‎

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<applet code="CalculatorAppletApplication.class"
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width="180" height="180">
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</applet>

‎corejava第7版/v1/v1ch10/AppletApplication/CalculatorAppletApplication.java‎

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/**
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@version 1.31 2004-05-07
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@author Cay Horstmann
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*/
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/*
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The applet viewer reads the tags below if you call it with
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appletviewer CalculatorAppletApplication.java (!)
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No separate HTML file is required.
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<applet code="CalculatorAppletApplication.class" width="200" height="200">
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</applet>
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*/
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import javax.swing.*;
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public class CalculatorAppletApplication
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extends CalculatorApplet
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// It's an applet. It's an application. It's BOTH!
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{
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public static void main(String[] args)
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{
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AppletFrame frame = new AppletFrame(new CalculatorApplet());
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frame.setTitle("CalculatorAppletApplication");
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frame.setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
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frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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frame.setVisible(true);
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}
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public static final int DEFAULT_WIDTH = 200;
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public static final int DEFAULT_HEIGHT = 200;
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}
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‎corejava第7版/v1/v1ch10/Bookmark/Bookmark.html‎

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<html>
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<head>
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<title>Bookmark Applet</title>
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</head>
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<frameset cols="320,*">
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<frame name="left" src="Left.html"
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marginheight="2" marginwidth="2"
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scrolling="no" noresize="noresize"/>
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<frame name="right" src="Right.html"
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marginheight="2" marginwidth="2"
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scrolling="yes" noresize="noresize"/>
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</frameset>
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</html>
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‎corejava第7版/v1/v1ch10/Bookmark/Bookmark.java‎

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/**
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@version 1.22 2004-05-07
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@author Cay Horstmann
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*/
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import java.awt.*;
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import java.awt.event.*;
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import java.applet.*;
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import java.util.*;
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import java.net.*;
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import javax.swing.*;
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public class Bookmark extends JApplet
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{
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public void init()
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{
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Box box = Box.createVerticalBox();
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ButtonGroup group = new ButtonGroup();
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int i = 1;
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String urlString;
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// read all link.n parameters
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while ((urlString = getParameter("link." + i)) != null)
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{
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try
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{
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final URL url = new URL(urlString);
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// make a radio button for each link
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JRadioButton button = new JRadioButton(urlString);
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box.add(button);
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group.add(button);
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// selecting the radio button shows the URL in the "right" frame
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button.addActionListener(new
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ActionListener()
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{
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public void actionPerformed(ActionEvent event)
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{
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AppletContext context = getAppletContext();
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context.showDocument(url, "right");
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}
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});
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}
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catch (MalformedURLException e)
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{
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e.printStackTrace();
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}
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i++;
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}
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add(box);
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}
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}
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‎corejava第7版/v1/v1ch10/Bookmark/Left.html‎

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<html>
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<head><title>A Bookmark Applet</title></head>
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<body>
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<p>
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Click on one of the radio buttons.
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The corresponding web page
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will be displayed in the frame on the right.
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</p>
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<applet code="Bookmark.class" width="290" height="300">
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<param name="link.1" value="http://java.sun.com"/>
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<param name="link.2" value="http://java.net"/>
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<param name="link.3" value="http://linuxtoday.com"/>
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<param name="link.4" value="http://www.horstmann.com"/>
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<param name="link.5" value="http://www.phptr.com"/>
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<param name="link.6" value="http://usps.com"/>
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<param name="link.7" value="http://www.cafeaulait.org"/>
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</applet>
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</body>
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</html>
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‎corejava第7版/v1/v1ch10/Bookmark/Right.html‎

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<html>
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<head><title>Web pages will be displayed here.</title></head>
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<body>
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<p>Click on one of the radio buttons to the left.
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The corresponding web page will be displayed here.</p>
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</body>
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</html>

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