达拉草201771010105《面向对象程序设计(java)》第十四周学习总结

第一部分:理论知识

JAR文件:

1.Java程序的打包:程序编译完成后,程序员 将.class文件压缩打包为.jar文件后,GUI界面 程序就可以直接双击图标运行。

2..jar文件(Java归档)既可以包含类文件,也可 以包含诸如图像和声音这些其它类型的文件。

3.JAR文件是压缩的,它使用ZIP压缩格式。

jar命令:

jar命令格式: jar {ctxui} [vfm0Me] [jar-file] [manifest-file] [entry-point] [-C dir]  files ...

(1) 创建JAR文件

jar cf jar-file input-file(s) c---want to Create a JAR file.

(2) 查看JAR文件

jar tf jar-file t---want to view the Table of contents of the JAR file.

(3) 提取JAR文件

jar xf jar-file [archived-file(s)] x---want to extract files from the JAR archive.

(4) 更新JAR文件

jar uf jar-file input-file(s) u---want to update an existing JAR file.

(5) 索引JAR文件

jar i jar-file i---index an existing JAR file.

清单文件:

每个JAR文件中包含一个用于描述归档特征的清单文 件(manifest)。清单文件被命名为MANIFEST.MF,它 位于JAR文件的一个特殊的META-INF子目录中。

清单文件的节与节之间用空行分开,最后一行必须以 换行符结束。否则,清单文件将无法被正确地读取。

运行JAR文件

1.用户可以通过下面的命令来启动应用程序: java –jar MyProgram.jar.

2.窗口操作系统,可通过双击JAR文件图标来启动应用程序。

资源:

Java中,应用程序使用的类通常需要一些相关的数 据文件,这些文件称为资源(Resource)。

(1)图像和声音文件。

(2)带有消息字符串和按钮标签的文本文件。

(3)  二进制数据文件,如:描述地图布局的文件。

编译、创建JAR文件和执行这个程序的命令如下:

– javac ResourceTest.java

– jar cvfm ResourceTest.jar ResourceTest.mf *.class *.gif *.txt – java –jar ResourceTest.jar

Eclipse导出JAR文件:

(1)工程没有引用外部jar包时,直接导出。
(2)当工程引用了其他的外部jar时,由于Eclipse 不支持同时导出外部jar包的功能,导出过程比 较复杂。

Java Web Start:

(1)Java Web Start是一个用Java编写的应用程序,它是Sun 公司推出的一项在Internet上发布应用程序的技术;

(2)通过Java Web Start可以使一个应用程序很容易地通过 web部署在各个平台上,包括Windows,Linux,Solaris等。

实验十五  GUI编程练习与应用程序部署

实验时间 2018-12-6

1、实验目的与要求

(1) 掌握Java应用程序的打包操作;

(2) 了解应用程序存储配置信息的两种方法;

(3) 掌握基于JNLP协议的java Web Start应用程序的发布方法;

(5) 掌握Java GUI 编程技术。

2、实验内容和步骤

实验1: 导入第13章示例程序,测试程序并进行代码注释。

测试程序1

在elipse IDE中调试运行教材585页程序13-1,结合程序运行结果理解程序;

将所生成的JAR文件移到另外一个不同的目录中,再运行该归档文件,以便确认程序是从JAR文件中,而不是从当前目录中读取的资源。

掌握创建JAR文件的方法;

 package resource;

 import java.awt.*;
import java.io.*;
import java.net.*;
import java.util.*;
import javax.swing.*; /**
* @version 1.41 2015-06-12
* @author Cay Horstmann
*/
public class ResourceTest
{
public static void main(String[] args)
{
EventQueue.invokeLater(() -> {
JFrame frame = new ResourceTestFrame();
frame.setTitle("ResourceTest");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
});
}
} /**
* A frame that loads image and text resources.
*/
class ResourceTestFrame extends JFrame
{
private static final int DEFAULT_WIDTH = 300;
private static final int DEFAULT_HEIGHT = 300; public ResourceTestFrame()
{
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
URL aboutURL = getClass().getResource("about.gif");
Image img = new ImageIcon(aboutURL).getImage();//根据指定的 URL 创建一个 ImageIcon
setIconImage(img);//设置要作为此窗口图标显示的图像。 JTextArea textArea = new JTextArea();//创建新的 TextArea
InputStream stream = getClass().getResourceAsStream("about.txt");//查找具有给定名称的资源。
try (Scanner in = new Scanner(stream, "UTF-8"))
{
while (in.hasNext())
textArea.append(in.nextLine() + "\n");
//将给定文本追加到文档结尾。如果模型为 null 或者字符串为 null 或空,则不执行任何操作。
}
add(textArea);
}
}

运行结果如下:

                         

测试程序2

elipse IDE中调试运行教材583-584程序13-2,结合程序运行结果理解程序;

了解Properties类中常用的方法;

 package properties;

 import java.awt.EventQueue;
import java.awt.event.*;
import java.io.*;
import java.util.Properties; import javax.swing.*; /**
* A program to test properties. The program remembers the frame position, size,
* and title.
* @version 1.01 2015-06-16
* @author Cay Horstmann
*/
public class PropertiesTest
{
public static void main(String[] args)
{
EventQueue.invokeLater(() -> {
PropertiesFrame frame = new PropertiesFrame();
frame.setVisible(true);
});
}
} /**
* A frame that restores position and size from a properties file and updates
* the properties upon exit.
*/
class PropertiesFrame extends JFrame
{
private static final int DEFAULT_WIDTH = 300;
private static final int DEFAULT_HEIGHT = 200; private File propertiesFile;
private Properties settings; public PropertiesFrame()
{
// 从属性中获取位置、大小和标题 String userDir = System.getProperty("user.home");
File propertiesDir = new File(userDir, ".corejava");
if (!propertiesDir.exists()) propertiesDir.mkdir();
propertiesFile = new File(propertiesDir, "program.properties"); Properties defaultSettings = new Properties();
defaultSettings.setProperty("left", "0");
defaultSettings.setProperty("top", "0");
defaultSettings.setProperty("width", "" + DEFAULT_WIDTH);
defaultSettings.setProperty("height", "" + DEFAULT_HEIGHT);
defaultSettings.setProperty("title", ""); settings = new Properties(defaultSettings); if (propertiesFile.exists())
try (InputStream in = new FileInputStream(propertiesFile))
{
settings.load(in);
}
catch (IOException ex)
{
ex.printStackTrace();
} int left = Integer.parseInt(settings.getProperty("left"));
int top = Integer.parseInt(settings.getProperty("top"));
int width = Integer.parseInt(settings.getProperty("width"));
int height = Integer.parseInt(settings.getProperty("height"));
setBounds(left, top, width, height); // 如果没有标题,询问用户 String title = settings.getProperty("title");
if (title.equals(""))//将此字符串与指定的对象比较。
title = JOptionPane.showInputDialog("Please supply a frame title:");
if (title == null) title = "";
setTitle(title);
//添加指定的窗口侦听器,以从此窗口接收窗口事件。
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent event)
{
settings.setProperty("left", "" + getX());
settings.setProperty("top", "" + getY());
settings.setProperty("width", "" + getWidth());
settings.setProperty("height", "" + getHeight());
settings.setProperty("title", getTitle());
try (OutputStream out = new FileOutputStream(propertiesFile))//创建一个向指定 File 对象表示的文件中写入数据的文件输出流。
{
settings.store(out, "Program Properties");
}
catch (IOException ex)
{
ex.printStackTrace();
}
System.exit(0);//终止当前正在运行的 Java 虚拟机。
}
});
}
}

运行结果如下:

   

测试程序3

elipse IDE中调试运行教材593-594程序13-3,结合程序运行结果理解程序;

了解Preferences类中常用的方法;

 package preferences;

 import java.awt.*;
import java.io.*;
import java.util.prefs.*; import javax.swing.*;
import javax.swing.filechooser.*; /**
* A program to test preference settings. The program remembers the frame
* position, size, and title.
* @version 1.03 2015-06-12
* @author Cay Horstmann
*/
public class PreferencesTest
{
public static void main(String[] args)
{
EventQueue.invokeLater(() -> {
PreferencesFrame frame = new PreferencesFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
});
}
} /**
* A frame that restores position and size from user preferences and updates the
* preferences upon exit.
*/
class PreferencesFrame extends JFrame
{
private static final int DEFAULT_WIDTH = 300;
private static final int DEFAULT_HEIGHT = 200;
private Preferences root = Preferences.userRoot();
private Preferences node = root.node("/com/horstmann/corejava"); public PreferencesFrame()
{
// 从偏好获得位置、大小、标题 int left = node.getInt("left", 0);
int top = node.getInt("top", 0);
int width = node.getInt("width", DEFAULT_WIDTH);
int height = node.getInt("height", DEFAULT_HEIGHT);
setBounds(left, top, width, height); // 如果没有标题,请询问用户 String title = node.get("title", "");
if (title.equals(""))
title = JOptionPane.showInputDialog("Please supply a frame title:");
//显示请求用户输入的问题消息对话框。
if (title == null) title = "";
setTitle(title); // 设置显示XML文件的文件选择器 final JFileChooser chooser = new JFileChooser();
chooser.setCurrentDirectory(new File("."));//设置当前目录
chooser.setFileFilter(new FileNameExtensionFilter("XML files", "xml"));
//使用指定的描述和文件扩展名创建一个 FileNameExtensionFilter // 设置菜单 JMenuBar menuBar = new JMenuBar();//创建菜单栏
setJMenuBar(menuBar);//设置此窗体的菜单栏。
JMenu menu = new JMenu("File");//构造一个新 JMenu,用提供的字符串作为其文本。
menuBar.add(menu); JMenuItem exportItem = new JMenuItem("Export preferences");
menu.add(exportItem);
exportItem
.addActionListener(event -> {
if (chooser.showSaveDialog(PreferencesFrame.this) == JFileChooser.APPROVE_OPTION)
{
try
{
savePreferences();
OutputStream out = new FileOutputStream(chooser
.getSelectedFile());
node.exportSubtree(out);
out.close();
}
catch (Exception e)
{
e.printStackTrace();
}
}
}); JMenuItem importItem = new JMenuItem("Import preferences");
menu.add(importItem);
importItem
.addActionListener(event -> {
if (chooser.showOpenDialog(PreferencesFrame.this) == JFileChooser.APPROVE_OPTION)
{//JFileChooser 为用户选择文件提供了一种简单的机制。
try
{
InputStream in = new FileInputStream(chooser
.getSelectedFile());
Preferences.importPreferences(in);
in.close();
}
catch (Exception e)
{
e.printStackTrace();
}
}
}); JMenuItem exitItem = new JMenuItem("Exit");
menu.add(exitItem);
exitItem.addActionListener(event -> {
savePreferences();
System.exit(0);
});
} public void savePreferences()
{
node.putInt("left", getX());
node.putInt("top", getY());
node.putInt("width", getWidth());
node.putInt("height", getHeight());
node.put("title", getTitle());
}
}

运行结果如下:

     

测试程序4

elipse IDE中调试运行教材619-622程序13-6,结合程序运行结果理解程序;

掌握基于JNLP协议的java Web Start应用程序的发布方法。

 package webstart;

 import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*; /**
A panel with calculator buttons and a result display.
*/
public class CalculatorPanel extends JPanel
{
private JTextArea display;
private JPanel panel;
private double result;
private String lastCommand;
private boolean start; /**
Lays out the panel.
*/
public CalculatorPanel()
{
setLayout(new BorderLayout()); result = 0;
lastCommand = "=";
start = true; // 添加显示 display = new JTextArea(10, 20); add(new JScrollPane(display), BorderLayout.NORTH); ActionListener insert = new InsertAction();
ActionListener command = new CommandAction(); // 在4×4网格中添加按钮 panel = new JPanel();
panel.setLayout(new GridLayout(4, 4)); addButton("7", insert);
addButton("8", insert);
addButton("9", insert);
addButton("/", command); addButton("4", insert);
addButton("5", insert);
addButton("6", insert);
addButton("*", command); addButton("1", insert);
addButton("2", insert);
addButton("3", insert);
addButton("-", command); addButton("0", insert);
addButton(".", insert);
addButton("=", command);
addButton("+", command); add(panel, BorderLayout.CENTER);
} /**
Gets the history text.
@return the calculator history
*/
public String getText()
{
return display.getText();
} /**
Appends a string to the history text.
@param s the string to append
*/
public void append(String s)
{
display.append(s);
} /**
Adds a button to the center panel.
@param label the button label
@param listener the button listener
*/
private void addButton(String label, ActionListener listener)
{
JButton button = new JButton(label);
button.addActionListener(listener);
panel.add(button);
} /**
This action inserts the button action string to the
end of the display text.
*/
private class InsertAction implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
String input = event.getActionCommand();
start = false;
display.append(input);
}
} /**
This action executes the command that the button
action string denotes.
*/
private class CommandAction implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
String command = event.getActionCommand(); if (start)
{
if (command.equals("-"))
{
display.append(command);
start = false;
}
else
lastCommand = command;
}
else
{
try
{
int lines = display.getLineCount();
int lineStart = display.getLineStartOffset(lines - 1);
int lineEnd = display.getLineEndOffset(lines - 1);
String value = display.getText(lineStart, lineEnd - lineStart);
display.append(" ");
display.append(command);
calculate(Double.parseDouble(value));
if (command.equals("="))
display.append("\n" + result);
lastCommand = command;
display.append("\n");
start = true;
}
catch (BadLocationException e)
{
e.printStackTrace();
}
}
}
} /**
Carries out the pending calculation.
@param x the value to be accumulated with the prior result.
*/
public void calculate(double x)
{
if (lastCommand.equals("+")) result += x;
else if (lastCommand.equals("-")) result -= x;
else if (lastCommand.equals("*")) result *= x;
else if (lastCommand.equals("/")) result /= x;
else if (lastCommand.equals("=")) result = x;
}
}
 package webstart;

 import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.net.MalformedURLException;
import java.net.URL; import javax.jnlp.BasicService;
import javax.jnlp.FileContents;
import javax.jnlp.FileOpenService;
import javax.jnlp.FileSaveService;
import javax.jnlp.PersistenceService;
import javax.jnlp.ServiceManager;
import javax.jnlp.UnavailableServiceException;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane; /**
* A frame with a calculator panel and a menu to load and save the calculator history.
*/
public class CalculatorFrame extends JFrame
{
private CalculatorPanel panel; public CalculatorFrame()
{
setTitle();
panel = new CalculatorPanel();
add(panel); JMenu fileMenu = new JMenu("File");
JMenuBar menuBar = new JMenuBar();
menuBar.add(fileMenu);
setJMenuBar(menuBar); JMenuItem openItem = fileMenu.add("Open");
openItem.addActionListener(event -> open());
JMenuItem saveItem = fileMenu.add("Save");
saveItem.addActionListener(event -> save()); pack();
} /**
* Gets the title from the persistent store or asks the user for the title if there is no prior
* entry.
*/
public void setTitle()
{
try
{
String title = null; BasicService basic = (BasicService) ServiceManager.lookup("javax.jnlp.BasicService");
URL codeBase = basic.getCodeBase(); PersistenceService service = (PersistenceService) ServiceManager
.lookup("javax.jnlp.PersistenceService");
URL key = new URL(codeBase, "title"); try
{
FileContents contents = service.get(key);
InputStream in = contents.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
title = reader.readLine();
}
catch (FileNotFoundException e)
{
title = JOptionPane.showInputDialog("Please supply a frame title:");
if (title == null) return; service.create(key, 100);
FileContents contents = service.get(key);
OutputStream out = contents.getOutputStream(true);
PrintStream printOut = new PrintStream(out);
printOut.print(title);
}
setTitle(title);
}
catch (UnavailableServiceException | IOException e)
{
JOptionPane.showMessageDialog(this, e);
}
} /**
* Opens a history file and updates the display.
*/
public void open()
{
try
{
FileOpenService service = (FileOpenService) ServiceManager
.lookup("javax.jnlp.FileOpenService");
FileContents contents = service.openFileDialog(".", new String[] { "txt" }); JOptionPane.showMessageDialog(this, contents.getName());//调出标题为 "Message" 的信息消息对话框。
if (contents != null)
{
InputStream in = contents.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String line;
while ((line = reader.readLine()) != null)
{
panel.append(line);
panel.append("\n");
}
}
}
catch (UnavailableServiceException e)
{
JOptionPane.showMessageDialog(this, e);
}
catch (IOException e)
{
JOptionPane.showMessageDialog(this, e);
}
} /**
* Saves the calculator history to a file.
*/
public void save()
{
try
{
ByteArrayOutputStream out = new ByteArrayOutputStream();
PrintStream printOut = new PrintStream(out);
printOut.print(panel.getText());
InputStream data = new ByteArrayInputStream(out.toByteArray());
FileSaveService service = (FileSaveService) ServiceManager
.lookup("javax.jnlp.FileSaveService");
service.saveFileDialog(".", new String[] { "txt" }, data, "calc.txt");
}
catch (UnavailableServiceException e)
{
JOptionPane.showMessageDialog(this, e);
}
catch (IOException e)
{
JOptionPane.showMessageDialog(this, e);
}
}
}
 package webstart;

 import java.awt.*;
import javax.swing.*; /**
* A calculator with a calculation history that can be deployed as a Java Web Start application.
* @version 1.04 2015-06-12
* @author Cay Horstmann
*/
public class Calculator
{
public static void main(String[] args)
{
EventQueue.invokeLater(() -> {
CalculatorFrame frame = new CalculatorFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
});
}
}

实验2GUI综合编程练习

按实验十四分组名单,组内讨论完成以下编程任务:

练习1:采用GUI界面设计以下程序,并进行部署与发布:

l  编制一个程序,将身份证号.txt 中的信息读入到内存中;

l  按姓名字典序输出人员信息;

l  查询最大年龄的人员信息;

l  查询最小年龄人员信息;

l  输入你的年龄,查询身份证号.txt中年龄与你最近人的姓名、身份证号、年龄、性别和出生地;

l  查询人员中是否有你的同乡。

l  输入身份证信息,查询所提供身份证号的人员信息,要求输入一个身份证数字时,查询界面就显示满足查询条件的查询结果,且随着输入的数字的增多,查询匹配的范围逐渐缩小。

 package 身份证;
import java.io.BufferedReader; import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
//import java.util.Arrays;
import java.util.Collections;
import java.util.Scanner;
import java.util.TimerTask; //import java.awt.*;
import javax.swing.*;
import java.awt.event.*; public class Main extends JFrame {
private static ArrayList studentlist;
private static ArrayList<Student> list;
private JPanel buttonPanel;
// private JPanel panel; Scanner scanner = new Scanner(System.in); public Main() {
studentlist = new ArrayList<>(); // Timer timer=new Timer();
JTextArea jt = new JTextArea();
jt.setBounds(520, 100, 800, 600);
buttonPanel = new JPanel(); JButton jButton = new JButton("1.字典排序:");
JButton jButton1 = new JButton("2.年龄最大和年龄最小:");
JLabel lab = new JLabel("3.猜猜你的老乡:");
JTextField jt1 = new JTextField();
JLabel lab1 = new JLabel("4.找找同龄人(年龄相近):");
JTextField jt2 = new JTextField();
JLabel lab2 = new JLabel("5.输入你的身份证号码:");
JTextField jt3 = new JTextField();
JButton jButton2 = new JButton("6.退出");
buttonPanel. setLayout(null);
jButton.setBounds(50, 160, 100, 30);
jButton1.setBounds(50, 220, 160, 30);
lab2.setBounds(50, 400, 100, 30);
lab.setBounds(50, 280, 150, 30);
jt1.setBounds(150, 280, 100, 30);
lab1.setBounds(50, 340, 150, 30);
jt2.setBounds(200, 340, 160, 30);
jt3.setBounds(200, 400, 160, 30);
jButton2.setBounds(50, 460, 60, 30);
buttonPanel.add(jButton);
buttonPanel.add(jButton1);
buttonPanel.add(lab);
buttonPanel.add(jt1);
buttonPanel.add(lab1);
buttonPanel.add(jt2);
buttonPanel.add(lab2);
buttonPanel.add(jt3);
buttonPanel.add(jButton2);
add(buttonPanel);
buttonPanel.add(jt); try { BufferedReader in = new BufferedReader(new FileReader("身份证号.txt"));
String temp = null;
while ((temp = in.readLine()) != null) { Scanner linescanner = new Scanner(temp); linescanner.useDelimiter(" ");
String name = linescanner.next();
String number = linescanner.next();
String sex = linescanner.next();
String age = linescanner.next();
String province = linescanner.nextLine();
Student student = new Student();
student.setName(name);
student.setnumber(number);
student.setsex(sex);
int a = Integer.parseInt(age);
student.setage(a);
student.setprovince(province);
studentlist.add(student); }
} catch (FileNotFoundException e) {
System.out.println("学生信息文件找不到");
e.printStackTrace();
} catch (IOException e) {
System.out.println("学生信息文件读取错误");
e.printStackTrace();
} jButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {
jt.setText(null);
Collections.sort(studentlist);
jt.setText(studentlist.toString());
// jt.append(studentlist.toString());
} });
jButton1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int max = 0, min = 100;
int j, k1 = 0, k2 = 0;
for (int i = 1; i < studentlist.size(); i++) {
j = ((Student) studentlist.get(i)).getage();
if (j > max) {
max = j;
k1 = i;
}
if (j < min) {
min = j;
k2 = i;
} }
jt.setText("年龄最大:" + studentlist.get(k1) + "年龄最小:" + studentlist.get(k2));
}
});
jButton2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
dispose();
System.exit(0);
}
});
jt1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String find = jt1.getText();
String text="";
String place = find.substring(0, 3);
for (int i = 0; i < studentlist.size(); i++) {
if (((Student) studentlist.get(i)).getprovince().substring(1, 4).equals(place)) {
text+="\n"+studentlist.get(i);
jt.setText("老乡:" + text);
}
}
}
});
jt2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String yourage = jt2.getText();
int a = Integer.parseInt(yourage);
int near = agenear(a);
int value = a - ((Student) studentlist.get(near)).getage();
jt.setText("年龄相近:" + studentlist.get(near));
}
});
jt3.addKeyListener(new KeyAdapter() { public void keyTyped(KeyEvent e) {
list = new ArrayList<>();
Collections.sort(studentlist);
String key = jt3.getText();
for (int i = 1; i < studentlist.size(); i++) {
if (((Student) studentlist.get(i)).getnumber().contains(key)) {
list.add((Student) studentlist.get(i));
jt.setText("你可能是:\n" + list); }
}
} }); } public static int agenear(int age) {
int min = 53, value = 0, k = 0;
for (int i = 0; i < studentlist.size(); i++) {
value = ((Student) studentlist.get(i)).getage() - age;
if (value < 0)
value = -value;
if (value < min) {
min = value;
k = i;
}
}
return k;
} }
 package 身份证;
import java.awt.*;
import javax.swing.*; /**
* @version 1.34 2015-06-12
* @author Cay Horstmann
*/
public class demo1
{
public static void main(String[] args)
{
EventQueue.invokeLater(() -> {
JFrame frame = new Main();
frame.setTitle("查询");
frame.setBounds(500, 50, 500, 500);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
});
}
}
 package 身份证;
public class Student implements Comparable<Student> { private String name;
private String number ;
private String sex ;
private int age;
private String province; public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getnumber() {
return number;
}
public void setnumber(String number) {
this.number = number;
}
public String getsex() {
return sex ;
}
public void setsex(String sex ) {
this.sex =sex ;
}
public int getage() { return age;
}
public void setage(int age) { this.age= age;
} public String getprovince() {
return province;
}
public void setprovince(String province) {
this.province=province ;
} public int compareTo(Student o) {
return this.name.compareTo(o.getName());
} public String toString() {
return name+"\t"+sex+"\t"+age+"\t"+number+"\t"+province+"\n";
} }

运行结果如下:

        

练习2:采用GUI界面设计以下程序,并进行部署与发布

l  编写一个计算器类,可以完成加、减、乘、除的操作

l  利用计算机类,设计一个小学生100以内数的四则运算练习程序,由计算机随机产生10道加减乘除练习题,学生输入答案,由程序检查答案是否正确,每道题正确计10分,错误不计分,10道题测试结束后给出测试总分;

l  将程序中测试练习题及学生答题结果输出到文件,文件名为test.txt。

 package shiwuzhou;

 import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Toolkit; import javax.swing.JFrame; public class New { public static void main (String args[])
{
Toolkit t=Toolkit.getDefaultToolkit();
Dimension s=t.getScreenSize();
EventQueue.invokeLater(() -> {
JFrame frame = new Demo();
frame.setBounds(0, 0,(int)s.getWidth()/2,(int)s.getHeight()/2);
frame.setTitle("第七组");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
});
} }
 package shiwuzhou;

 import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Collections;
import java.util.Scanner; import javax.swing.*; import java.math.*; public class Demo extends JFrame { private String[] c=new String[10];
private String[] c1=new String[10];
private int[] list=new int[10];
int i=0,i1=0,sum = 0;
private PrintWriter out = null;
private JTextArea text,text1;
private int counter; public Demo() {
JPanel Panel = new JPanel();
Panel.setLayout(null);
JLabel JLabel1=new JLabel("");
JLabel1.setBounds(500, 800, 400, 30);
JLabel1.setFont(new Font("Courier",Font.PLAIN,35));
JButton Button = new JButton("生成题目");
Button.setBounds(50,150,150,50);
Button.setFont(new Font("Courier",Font.PLAIN,20));
Button.addActionListener(new Action());
JButton Button2 = new JButton("确定答案");
Button2.setBounds(300,150,150,50);
Button2.setFont(new Font("Courier",Font.PLAIN,20));
Button2.addActionListener(new Action1());
JButton Button3 = new JButton("读出文件");
Button3.setBounds(500,150,150,50);
Button3.setFont(new Font("Courier",Font.PLAIN,20));
Button3.addActionListener(new Action2());
text=new JTextArea(30,80);text.setBounds(30, 50, 200, 50);
text.setFont(new Font("Courier",Font.PLAIN,35));
text1=new JTextArea(30,80);
text1.setBounds(270, 50, 200, 50);
text1.setFont(new Font("Courier",Font.PLAIN,35)); Panel.add(text);
Panel.add(text1); Panel.add(Button);
Panel.add(Button2);
Panel.add(Button3);
Panel.add(JLabel1);
add(Panel); } private class Action implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
text1.setText("0");
if(i<10) { int a = 1+(int)(Math.random() * 99);
int b = 1+(int)(Math.random() * 99);
int m= (int) Math.round(Math.random() * 3);
switch(m)
{
case 0:
while(a<b){
b = (int) Math.round(Math.random() * 100);
a = (int) Math.round(Math.random() * 100);
}
c[i]=(i+":"+a+"/"+b+"=");
list[i]=Math.floorDiv(a, b);
text.setText(i+":"+a+"/"+b+"=");
i++;
break;
case 1:
c[i]=(i+":"+a+"*"+b+"=");
list[i]=Math.multiplyExact(a, b);
text.setText(i+":"+a+"*"+b+"=");
i++;
break;
case 2:
c[i]=(i+":"+a+"+"+b+"=");
list[i]=Math.addExact(a, b);
text.setText(i+":"+a+"+"+b+"=");
i++;
break ;
case 3:
while(a<=b){
b = (int) Math.round(Math.random() * 100);
a = (int) Math.round(Math.random() * 100);
}
c[i]=(i+":"+a+"-"+b+"=");
text.setText(i+":"+a+"-"+b+"=");
list[i]=Math.subtractExact(a, b);
i++;
break ;
}
}
}
}
private class Action1 implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
if(i<10) {
text.setText(null);
String daan=text1.getText().toString().trim();
int a = Integer.parseInt(daan);
if(text1.getText()!="") {
if(list[i1]==a) sum+=10;
}
c1[i1]=daan;
i1++;
}
}
} private class Action2 implements ActionListener
{
public void actionPerformed(ActionEvent event)
{ try {
out = new PrintWriter("text.txt");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
for(int counter=0;counter<10;counter++)
{
out.println(c[counter]+c1[counter]);
}
out.println("成绩"+sum);
out.close(); } }
}

运行结果如下:

       

 实验总结:

在本周的 学习中我们学了第十三章的部署应用知识,JRA文件的应用,它除了类文件,图像和其他资源外,还包含一个用用于描述归档特征的清单文件,通过验证实验测试,结合运行结果大概理解了本周的相关知识,比如属性,资源等。这周实验的难点就是最后的两个编程题,尤其是第一个编程的模糊查找。

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