201771010112罗松《面向对象程序设计（java）》第十五周学习总结

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

l 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；

l 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。

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);});}
}/*** 一个加载图像和文本资源的框架。*/
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();setIconImage(img);JTextArea textArea = new JTextArea();InputStream stream = getClass().getResourceAsStream("about.txt");try (Scanner in = new Scanner(stream, "UTF-8")){while (in.hasNext())textArea.append(in.nextLine() + "\n");}add(textArea);}
}

测试程序2

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

2.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.*;/*** 一个测试属性的程序。 程序记住帧的位置、大小和标题* @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);});}
}/*** 从属性文件和更新恢复位置和大小的框架。退出时的属性。*/
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(){// 从属性获取位置、大小、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，请询问用户
String title = settings.getProperty("title");if (title.equals(""))title = JOptionPane.showInputDialog("Please supply a frame title:");if (title == null) title = "";setTitle(title);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)){settings.store(out, "Program Properties");}catch (IOException ex){ex.printStackTrace();}System.exit(0);}});}
}

测试程序3

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

2.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.*;/*** 一个测试偏好设置的程序。程序记住框架。位置、大小和标题。* @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);});}
}/*** 从用户偏好恢复位置和大小并在退出时更新首选项的框架。*/
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:");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("."));chooser.setFileFilter(new FileNameExtensionFilter("XML files", "xml"));// 设置菜单
JMenuBar menuBar = new JMenuBar();setJMenuBar(menuBar);JMenu menu = new JMenu("File");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){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());      }
}

测试程序4

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

2.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 javax.swing.*;/*** 具有可作为Java Web启动应用程序部署的计算历史的计算器。* @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);});}
}

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;/*** 一个带有计算器面板和菜单的框架，用来载入和保存计算器历史。*/
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();}/*** 从持久存储中获取标题，或者在没有以前的条目的情况下向用户请求标题。*/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);}}/*** 打开历史文件并更新显示。*/public void open(){try{FileOpenService service = (FileOpenService) ServiceManager.lookup("javax.jnlp.FileOpenService");FileContents contents = service.openFileDialog(".", new String[] { "txt" });JOptionPane.showMessageDialog(this, contents.getName());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);}}/*** 将计算器历史保存到文件中。*/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 java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;/**具有计算器按钮和结果显示的面板。
*/
public class CalculatorPanel extends JPanel
{  private JTextArea display;private JPanel panel;private double result;private String lastCommand;private boolean start;/**列出面板。*/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);}/**获取历史文本。@return the calculator history*/public String getText(){return display.getText();}/**将字符串追加到历史文本中。@param s the string to append*/public void append(String s){display.append(s);}/**向中心面板添加一个按钮。@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);}/**此操作将按钮操作字符串插入到显示文本结束。*/private class InsertAction implements ActionListener{public void actionPerformed(ActionEvent event){String input = event.getActionCommand();start = false;display.append(input);}}/**此操作执行按钮的命令。动作字符串表示。*/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();}}}}/**执行悬而未决的计算。@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;}
}

实验2：GUI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：

1.编制一个程序，将身份证号.txt 中的信息读入到内存中；

2.按姓名字典序输出人员信息；

3.查询最大年龄的人员信息；

4.查询最小年龄人员信息；

5.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；

6.查询人员中是否有你的同乡。

7.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 shiwuzhou;import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Toolkit;import javax.swing.JFrame;public class Out {public static void main (String args[]){Toolkit t=Toolkit.getDefaultToolkit();Dimension s=t.getScreenSize(); EventQueue.invokeLater(() -> {JFrame frame = new Main1();frame.setBounds(0, 0,(int)s.getWidth(),(int)s.getHeight());frame.setTitle("信息");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);});        }}

package shiwuzhou;import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;
import java.util.Timer;
import javax.swing.*;public class Main1 extends JFrame
{private static ArrayList<Person> Personlist;Scanner scanner = new Scanner(System.in);File file = new File("D:\\身份证号.txt");private JPanel Panel;private JLabel JLabel1;private JButton Button,Button2,Button3;private JTextArea text,text1,text2,text3;boolean tru=true;public  Main1() {Panel = new JPanel();Panel.setLayout(null);Button = new JButton("1:按姓名字典序输出人员信息");Button2 = new JButton("2:查询最大年龄与最小年龄人员信息");Button3 = new JButton("查询相近年龄");JLabel1 = new JLabel("输入身份证号或者地址查询");JLabel1.setBounds(900, 50, 400, 30);text=new JTextArea(30,80);text.setBounds(50, 180, 700, 700);text1=new JTextArea(1,30);text1.setBounds(900, 80, 400, 30);text2=new JTextArea(30,80);text2.setBounds(900,180,700, 700);text3=new JTextArea(30,80);text3.setBounds(420,100,200,40);Button.addActionListener(new Action());Button.setBounds(50,50,300,40);Button2.addActionListener(new Action1());Button2.setBounds(50,100,300,40);Button3.addActionListener(new Action2());Button3.setBounds(650,100,120,40);Panel.add(JLabel1);Panel.add(Button);Panel.add(Button2);Panel.add(Button3);Panel.add(text);Panel.add(text2);Panel.add(text1);Panel.add(text3);add(Panel);Timer timer = new Timer();      TimerTask timeTask=new TimerTask() {@Overridepublic void run(){             // TODO Auto-generated method stubtext2.setText(null);String place=text1.getText().toString().trim();for (int i = 0; i <Personlist.size(); i++) {String Str=(String)Personlist.get(i).getbirthplace();if(Str.contains(place)&&!place.equals("")) {text2.append(Personlist.get(i).toString());}  }      for (int i = 0; i <Personlist.size(); i++) {String Str=(String)Personlist.get(i).getID();if(Str.contains(place)&&!place.equals("")) {text2.append(Personlist.get(i).toString());}  }    }};timer.schedule(timeTask, 0,100);Personlist = new ArrayList<>();       try {FileInputStream fis = new FileInputStream(file);BufferedReader in = new BufferedReader(new InputStreamReader(fis));String temp = null;while ((temp = in.readLine()) != null) {            Scanner linescanner = new Scanner(temp);               linescanner.useDelimiter(" ");    String name = linescanner.next();String ID = linescanner.next();String sex = linescanner.next();String age = linescanner.next();String place =linescanner.nextLine();Person Person = new Person();Person.setname(name);Person.setID(ID);Person.setsex(sex);int a = Integer.parseInt(age);Person.setage(a);Person.setbirthplace(place);Personlist.add(Person);}} catch (FileNotFoundException e) {System.out.println("查找不到信息");e.printStackTrace();} catch (IOException e) {System.out.println("信息读取有误");e.printStackTrace();}}private class Action implements ActionListener{public void actionPerformed(ActionEvent event){        text.setText(null);Collections.sort(Personlist);text.append(Personlist.toString());}}         private class Action1 implements ActionListener{public void actionPerformed(ActionEvent event){        text.setText(null);int max=0,min=100;int j,k1 = 0,k2=0;for(int i=1;i<Personlist.size();i++){j=Personlist.get(i).getage();if(j>max){max=j; k1=i;}if(j<min){min=j; k2=i;}}  text.append("年龄最大：   "+Personlist.get(k1)+"\n"+"年龄最小：  "+Personlist.get(k2));     }}          private class Action2 implements ActionListener{public void actionPerformed(ActionEvent event){        text.setText(null);int a = Integer.parseInt(text3.getText().toString().trim());         int d_value=a-Personlist.get(agenear(a)).getage();for (int i = 0; i < Personlist.size(); i++){int p=Personlist.get(i).getage()-a;if(p==d_value||-p==d_value) text.append(Personlist.get(i).toString());} }} public static int agenear(int age) {int j=0,min=53,d_value=0,k=0;for (int i = 0; i < Personlist.size(); i++){d_value=Personlist.get(i).getage()-age;if(d_value<0) d_value=-d_value; if (d_value<min) {min=d_value;k=i;}}    return k;}}

package shiwuzhou;public class Person implements Comparable<Person> {
private String name;
private String ID;
private int age;
private String sex;
private String birthplace;public String getname()
{return name;
}
public void setname(String name)
{this.name = name;
}
public String getID()
{return ID;
}
public void setID(String ID)
{this.ID= ID;
}
public int getage()
{return age;
}
public void setage(int age)
{this.age= age;
}
public String getsex()
{return sex;
}
public void setsex(String sex)
{this.sex= sex;
}
public String getbirthplace()
{return birthplace;
}
public void setbirthplace(String birthplace)
{this.birthplace= birthplace;
}public int compareTo(Person o)
{return this.name.compareTo(o.getname());
}public String toString()
{return  name+"\t"+sex+"\t"+age+"\t"+ID+"\t"+birthplace+"\n";}}

练习2：采用GUI界面设计以下程序，并进行部署与发布

1.编写一个计算器类，可以完成加、减、乘、除的操作

2.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；

3.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("信息");

                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();}}
}

实验总结：

这次实验量多且难度还大，学起来比较难受，不过通过小组三人的讨论最终还是一一的顺利完成了，有明确的分工，讨论，收获很大，不过临近期末还是希望老师作业布置的少一点，毕竟其他课也是要复习的。

转载于:https://www.cnblogs.com/xuezhiqian/p/10091840.html

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