李晓菁201771010114 《面向对象程序设计（java）》课程学习总结
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实验十八 总复习
实验时间 2018-12-30
1、实验目的与要求
(1) 综合掌握java基本程序结构；
(2) 综合掌握java面向对象程序设计特点；
(3) 综合掌握java GUI 程序设计结构；
(4) 综合掌握java多线程编程模型；
(5) 综合编程练习。
2、实验内容和步骤
任务1：填写课程课后调查问卷，网址：https://www.wjx.cn/jq/33108969.aspx。
任务2：综合编程练习
练习1：设计一个用户信息采集程序，要求如下：
（1） 用户信息输入界面如下图所示:
（1）用户点击提交按钮时，用户输入信息显示控制台界面；
（2）用户点击重置按钮后，清空用户已输入信息；
（3）点击窗口关闭，程序退出。
import java.awt.EventQueue; import javax.swing.JFrame; public class Main { public static void main(String[] args) { EventQueue.invokeLater(() -> { DemoJFrame page = new DemoJFrame(); }); } } main
import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.GridLayout; import java.awt.LayoutManager; import java.awt.Panel; 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.IOException; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.Timer; import java.util.TimerTask; import javax.swing.BorderFactory; import javax.swing.ButtonGroup; import javax.swing.ButtonModel; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JRadioButton; import javax.swing.JTextField; public class DemoJFrame extends JFrame { private JPanel jPanel1; private JPanel jPanel2; private JPanel jPanel3; private JPanel jPanel4; private JTextField fieldname; private JComboBox comboBox; private JTextField fieldadress; private ButtonGroup bg; private JRadioButton male; private JRadioButton female; private JCheckBox read; private JCheckBox movie; private JCheckBox learn; public DemoJFrame() { // 设置窗口大小 this.setSize(800, 400); // 设置可见性 this.setVisible(true); // 设置标题 this.setTitle("编程练习一"); // 设置关闭操作 this.setDefaultCloseOperation(EXIT_ON_CLOSE); // 设置窗口居中 WinCenter.center(this); // 创建四个面板对象 jPanel1 = new JPanel(); setJPanel1(jPanel1); jPanel2 = new JPanel(); setJPanel2(jPanel2); jPanel3 = new JPanel(); setJPanel3(jPanel3); jPanel4 = new JPanel(); setJPanel4(jPanel4); // 设置容器的为流布局 FlowLayout flowLayout = new FlowLayout();//构造一个新的 FlowLayout，它是居中对齐的 this.setLayout(flowLayout); // 将四个面板添加到容器中 this.add(jPanel1); this.add(jPanel2); this.add(jPanel3); this.add(jPanel4); } /* * 设置面一 */ private void setJPanel1(JPanel jPanel) { // TODO 自动生成的方法存根 jPanel.setPreferredSize(new Dimension(700, 45)); // 给面板的布局设置为网格布局 一行4列 jPanel.setLayout(new GridLayout(1, 4)); JLabel name = new JLabel("姓名:"); name.setSize(100, 50); fieldname = new JTextField(""); fieldname.setSize(80, 20); JLabel study = new JLabel("学历:"); comboBox = new JComboBox(); comboBox.addItem("初中"); comboBox.addItem("高中"); comboBox.addItem("本科"); jPanel.add(name); jPanel.add(fieldname); jPanel.add(study); jPanel.add(comboBox); } /* * 设置面板二 */ private void setJPanel2(JPanel jPanel) { // TODO 自动生成的方法存根 jPanel.setPreferredSize(new Dimension(700, 50)); // 给面板的布局设置为网格布局 一行4列 jPanel.setLayout(new GridLayout(1, 4)); JLabel name = new JLabel("地址:"); fieldadress = new JTextField(); fieldadress.setPreferredSize(new Dimension(150, 50)); JLabel study = new JLabel("爱好:"); JPanel selectBox = new JPanel(); selectBox.setBorder(BorderFactory.createTitledBorder(""));//创建一个新标题边框 selectBox.setLayout(new GridLayout(3, 1));//创建具有指定行数和列数的网格布局。给布局中的所有组件分配相等的大小。 read = new JCheckBox("读书"); movie = new JCheckBox("看电影"); learn = new JCheckBox("学习"); selectBox.add(read); selectBox.add(movie); selectBox.add(learn); jPanel.add(name); jPanel.add(fieldadress); jPanel.add(study); jPanel.add(selectBox); } /* * 设置面板三 */ private void setJPanel3(JPanel jPanel) { // TODO 自动生成的方法存根 jPanel.setPreferredSize(new Dimension(700, 150)); FlowLayout flowLayout = new FlowLayout(FlowLayout.LEFT); jPanel.setLayout(flowLayout); JLabel sex = new JLabel("性别:"); JPanel selectBox = new JPanel(); selectBox.setBorder(BorderFactory.createTitledBorder("")); selectBox.setLayout(new GridLayout(2, 1)); bg = new ButtonGroup(); male = new JRadioButton("男"); female = new JRadioButton("女"); bg.add(male); bg.add(female); selectBox.add(male); selectBox.add(female); jPanel.add(sex); jPanel.add(selectBox); } /* * 设置面板四 */ private void setJPanel4(JPanel jPanel) { // TODO 自动生成的方法存根 jPanel.setPreferredSize(new Dimension(700, 150)); FlowLayout flowLayout = new FlowLayout(FlowLayout.CENTER, 50, 10); jPanel.setLayout(flowLayout); jPanel.setLayout(flowLayout); JButton sublite = new JButton("提交"); JButton reset = new JButton("重置"); sublite.addActionListener((e) -> valiData()); reset.addActionListener((e) -> Reset());//给提交和重置按钮创建监听器 jPanel.add(sublite); jPanel.add(reset); } /* * 提交数据 */ private void valiData() { // TODO 自动生成的方法存根 // 拿到数据 String name = fieldname.getText().toString().trim(); String xueli = comboBox.getSelectedItem().toString().trim(); String address = fieldadress.getText().toString().trim(); System.out.println(name); System.out.println(xueli); String hobbystring=""; if (read.isSelected()) { hobbystring+="读书 "; } if (movie.isSelected()) { hobbystring+="看电影 "; } if (learn.isSelected()) { hobbystring+="学习 "; } System.out.println(address); if (male.isSelected()) { System.out.println("男"); } if (female.isSelected()) { System.out.println("女"); } System.out.println(hobbystring); } /* * 重置 */ private void Reset() { // TODO 自动生成的方法存根 fieldadress.setText(null); fieldname.setText(null); comboBox.setSelectedIndex(0); read.setSelected(false); movie.setSelected(false); learn.setSelected(false); bg.clearSelection(); } }
import java.awt.Dimension; import java.awt.Toolkit; import java.awt.Window; public class WinCenter { public static void center(Window win){ Toolkit tkit = Toolkit.getDefaultToolkit(); Dimension sSize = tkit.getScreenSize(); Dimension wSize = win.getSize(); if(wSize.height > sSize.height){ wSize.height = sSize.height; } if(wSize.width > sSize.width){ wSize.width = sSize.width; } win.setLocation((sSize.width - wSize.width)/ 2, (sSize.height - wSize.height)/ 2); } }
点击提交后在控制台的显示
点击重置后的显示
练习2：采用GUI界面设计以下程序：
编制一个程序，将身份证号.txt 中的信息读入到内存中；
按姓名字典序输出人员信息；
查询最大年龄的人员信息；
查询最小年龄人员信息；
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；
查询人员中是否有你的同乡。
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 project3; //import javax.swing.JFrame; 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() { @Override public void run() { // TODO Auto-generated method stub text2.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) + " " + "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 project3; import java.awt.*; import javax.swing.*; public class ButtonTest { public static void main(String[] args) { EventQueue.invokeLater(() -> { JFrame frame = new Main1(); frame.setTitle("身份证"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); }); } }
package project3; 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("身份查询系统"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); }); } }
package project3; 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 + " " + sex + " " + age + " " + ID + " " + birthplace + " "; } }
练习3：采用GUI界面设计以下程序
编写一个计算器类，可以完成加、减、乘、除的操作
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；
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 project4; public class Main { public static void main(String[] args) { MyExGUI lg = new MyExGUI(); // new MyExGUI(); } }
package project4; import java.awt.Color; import java.awt.Graphics; import java.awt.Graphics2D; import java.util.ArrayList; import java.util.Random; import javax.swing.JFrame; public class chart extends JFrame { // 绘制柱形统计图 ArrayList<Integer> ran = new ArrayList<Integer>(); public chart(ArrayList<Integer> scores) { super(); getContentPane().setForeground(Color.CYAN); setForeground(Color.CYAN); setBackground(Color.CYAN); for (int i = 0; i < scores.size(); i++) { ran.add(scores.get(i)); System.out.println(scores.get(i)); } setTitle("绘制柱形图"); setSize(600, 400); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } @Override public void paint(Graphics g) { int Width = getWidth(); int Height = getHeight(); int leftMargin = 20;// 柱形图左边界 int topMargin = 50;// 柱形图上边界 Graphics2D g2 = (Graphics2D) g; g2.setColor(Color.WHITE);// 绘制白色背景 g2.fillRect(0, 0, Width, Height - 100);// 绘制矩形图 g2.setColor(Color.black); for (int i = 0; i <= 10; i++) { // 绘制灰色横线和百分比 g2.drawString((100 - 10 * i) + " ", 15, topMargin + 30 * i); g2.drawLine(10, topMargin + 30 * i, Width, topMargin + 30 * i);// 绘制灰色横线 } g2.setColor(Color.RED); for (int i = 0; i <= ran.size(); i++) { // 绘制柱形图 int step = (i + 1) * 40;// 设置每个柱形图的水平间隔为40 // 绘制矩形 g2.fillRoundRect(leftMargin + step * 2 - 5, (100 - ran.get(i)) * 3 + 50, 40, 300 - (100 - ran.get(i)) * 3, 40, 10); // 列出测试轮数 g2.drawString("第" + (i + 1) + "轮", leftMargin + step * 2, 380); } } }
package project4; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.util.ArrayList; import java.util.Random; import java.util.Scanner; public class arithmetic { ArrayList<String> list = new ArrayList<String>(); ArrayList<String> list_timu = new ArrayList<String>(); ArrayList<String> list_answer = new ArrayList<String>(); public arithmetic() { FileOutputStream outSTr = null; BufferedOutputStream Buff = null; int number_n = 10, count; ArrayList<String> list_temp = new ArrayList<String>(); String[] operator = new String[] { "+", "-", "*", "/" }; Random rand = new Random(); File file1 = new File("D:\\test.txt"); if (file1.exists()) { // 创建文件 try { file1.createNewFile(); } catch (IOException e) { e.printStackTrace(); } } while (number_n > 0) { int[] number_temp = new int[rand.nextInt(2) + 3]; String[] str_temp = new String[number_temp.length - 1]; for (int i = 0; i < number_temp.length; i++) { if (i < number_temp.length - 1) { number_temp[i] = rand.nextInt(100); list_temp.add(String.valueOf(number_temp[i])); str_temp[i] = operator[rand.nextInt(4)]; list_temp.add(str_temp[i]); } else { number_temp[i] = rand.nextInt(100); list_temp.add(String.valueOf(number_temp[i])); } } count = calculate_RPN(produce_RPN(list_temp)); if (count != -1) { list_timu.add(transform_string(list_temp)); list_answer.add(String.valueOf(count)); list_temp.add(" = " + count); list.add(transform_string(list_temp)); number_n--; list_temp.clear(); } else list_temp.clear(); System.out.println(number_n); } try { outSTr = new FileOutputStream(file1); Buff = new BufferedOutputStream(outSTr); for (int i = 0; i < list.size(); i++) { try { Buff.write(list.get(i).getBytes()); Buff.write(" ".getBytes()); } catch (IOException e) { e.printStackTrace(); i--; } } Buff.flush(); Buff.close(); } catch (IOException e) { e.printStackTrace(); } // Buff.close(); try { outSTr.close(); } catch (IOException e) { e.printStackTrace(); } for (int i = 0; i < list.size(); i++) { System.out.print(list.get(i)); System.out.println(); } System.out.print("计算完毕！"); } public static int calculate_RPN(ArrayList<String> list_temp) { int i = 0, t; double a = 0, b = 0; String l_temp; Stack sk = new Stack(10); for (t = 0; t < list_temp.size(); t++) { l_temp = list_temp.get(i++); if (!isInteger(l_temp)) { b = sk.mypop(); a = sk.mypop(); switch (l_temp) { case "+": sk.mypush(a + b); break; case "-": if (!(a < b)) { sk.mypush(a - b); } else return -1; break; case "*": sk.mypush(a * b); break; case "/": if (b == 0 || a < b) return -1; sk.mypush(a / b); break; } System.out.println("st.mytop: " + sk.mypeek()); } else { sk.mypush((double) Integer.parseInt(l_temp)); } } if (!sk.myisempty()) { a = sk.mypop(); b = a - (int) a; System.out.println("a: " + a); if (a > 0 && b == 0) { return (int) a; } else return -1; } else return -1; } public static ArrayList<String> produce_RPN(ArrayList<String> list_temp) { int t = 0, i = 0; String tmp; Tack mytack = new Tack(10); ArrayList<String> lt_temp = new ArrayList<String>(); while (true) { tmp = list_temp.get(i++); if (isInteger(tmp)) { lt_temp.add(tmp); } else { if (mytack.myisempty()) { mytack.mypush(tmp); } else { if (isCPriority(tmp, mytack.mypeek())) mytack.mypush(tmp); else { lt_temp.add(mytack.mypop()); mytack.mypush(tmp); } } } if (i >= list_temp.size()) { while (!mytack.myisempty()) lt_temp.add(mytack.mypop()); System.out.println(transform_string(list_temp)); list_temp = lt_temp; System.out.println(list_temp); return list_temp; } } } public static boolean isInteger(String str) { for (int i = str.length(); --i >= 0;) { if (!Character.isDigit(str.charAt(i))) { return false; } } return true; } public static boolean isCPriority(String str, String s) { if ((str + s).equals("*+") || (str + s).equals("*-") || (str + s).equals("/+") || (str + s).equals("/-")) return true; else return false; } public static String transform_string(ArrayList<String> list_temp) { String s = ""; for (int i = 0; i < list_temp.size(); i++) { s += list_temp.get(i); } return s; } static class Stack { int mytop; double stk[]; public Stack(int num) { mytop = -1; stk = new double[num]; } /* 出栈 */ double mypop() { double peek = stk[mytop]; mytop--; return peek; } /* 入栈 */ void mypush(double x) { mytop++; stk[mytop] = x; } /* 判空 */ Boolean myisempty() { if (mytop == -1) return true; else return false; } /* 取栈顶元素 */ double mypeek() { double peek = stk[mytop]; return peek; } /* 栈大小 */ int mysize() { return mytop + 1; } } static class Tack { int mytop; String tk[]; public Tack(int num) { mytop = -1; tk = new String[num]; } /* 出栈 */ String mypop() { String peek = tk[mytop]; mytop--; return peek; } /* 入栈 */ void mypush(String x) { mytop++; tk[mytop] = x; } /* 判空 */ Boolean myisempty() { if (mytop == -1) return true; else return false; } /* 取栈顶元素 */ String mypeek() { String peek = tk[mytop]; return peek; } /* 栈大小 */ int mysize() { return mytop + 1; } } }
package project4; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.util.ArrayList; import javax.swing.*; public class MyExGUI extends JFrame { ArrayList<String> user_zongti = new ArrayList<String>(); ArrayList<String> user_zonganswer = new ArrayList<String>(); ArrayList<String> user_answer = new ArrayList<String>(); ArrayList<String> true_answer = new ArrayList<String>(); ArrayList<String> jta_timu = new ArrayList<String>(); ArrayList<String> jta_zong = new ArrayList<String>(); ArrayList<Integer> user_fenshu = new ArrayList<Integer>(); JMenuBar jm; // 菜单条组件 JMenu menu;// 菜单 JMenuItem item1, item2;// 菜单项 JMenu build; // 二级菜单 JMenuItem file, project; TextArea answer_all = new TextArea(); TextField jta = new TextField(); TextField jta_answer = new TextField(); JLabel num_answer = new JLabel(); JLabel answer; JToolBar jtb;// 工具条 JButton jb1, jb2, jb3, jb4, jb5, jb6, jb7, jb_next; int answer_count; int answer_fenshu; public MyExGUI() { // 创建菜单 jm = new JMenuBar(); menu = new JMenu("文件(F)"); menu.setMnemonic(‘f‘); // 助记符 build = new JMenu("新建"); file = new JMenuItem("文件"); project = new JMenuItem("答题"); item1 = new JMenuItem("保存(S)"); item2 = new JMenuItem("退出"); answer = new JLabel("第 1 题"); // 添加菜单项至菜单上 build.add(file); build.add(project); menu.add(build); menu.add(item1); menu.add(item2); menu.addSeparator(); // 将菜单加入至菜单栏 jm.add(menu); JPanel contentPanel = new JPanel(); contentPanel.setLayout(null); JLabel daan = new JLabel("答案"); JLabel dengyu = new JLabel("="); num_answer = answer; num_answer.setFont(new Font("宋体", Font.BOLD, 22)); jb_next = new JButton("下一题"); jta.setFont(new Font("宋体", Font.BOLD, 22)); jta_answer.setFont(new Font("宋体", Font.BOLD, 22)); jb_next.setFont(new Font("宋体", Font.BOLD, 22)); daan.setFont(new Font("宋体", Font.BOLD, 22)); dengyu.setFont(new Font("宋体", Font.BOLD, 22)); contentPanel.add(num_answer); contentPanel.add(daan); contentPanel.add(dengyu); contentPanel.add(jta); contentPanel.add(jta_answer); contentPanel.add(answer_all); contentPanel.add(jb_next); num_answer.setBounds(90, 20, 130, 50); daan.setBounds(250, 20, 90, 50); jta.setBounds(50, 70, 150, 30); dengyu.setBounds(205, 70, 20, 20); jta_answer.setBounds(230, 70, 100, 30); jb_next.setBounds(350, 70, 110, 30); answer_all.setBounds(50, 120, 400, 300); this.setJMenuBar(jm); // 添加菜单栏，不能设定位置，会自动放在最上部 this.add(contentPanel); this.setTitle("在线答题系统"); this.setSize(600, 500); this.setVisible(true); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); item1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) { FileOutputStream outSTr = null; BufferedOutputStream Buff = null; boolean flag = true; File file; // String test ; do { // test = "test"+count; String inputValue = JOptionPane.showInputDialog("Please input file name"); file = new File(inputValue + "test.txt"); if (!file.exists()) { // 创建文件 try { flag = file.createNewFile(); } catch (IOException e) { e.printStackTrace(); } flag = false; } else { JOptionPane.showMessageDialog(null, "该文件名已存在，请重新输入", "ERROR", JOptionPane.ERROR_MESSAGE); flag = true; } } while (flag); // 写入文件 String u_answer; try { outSTr = new FileOutputStream(file); Buff = new BufferedOutputStream(outSTr); System.out.println("选择是后执行的代码" + user_zongti.size() + user_answer.size()); for (int i = 0; i < user_zongti.size(); i++) { try { Buff.write(user_zongti.get(i).getBytes()); Buff.write(" ".getBytes()); u_answer = user_answer.get(i); if (u_answer.equals("")) u_answer = "没有作答"; Buff.write(u_answer.getBytes()); Buff.write(" ".getBytes()); } catch (IOException e) { e.printStackTrace(); i--; } } Buff.flush(); Buff.close(); } catch (IOException e) { e.printStackTrace(); } try { outSTr.close(); } catch (IOException e) { e.printStackTrace(); } user_zongti.clear(); user_answer.clear(); } }); project.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) { arithmetic art = new arithmetic(); true_answer = art.list_answer; jta_timu = art.list_timu; jta_zong = art.list; answer_count = 1; answer_all.setText(""); for (int i = 0; i < art.list_timu.size(); i++) { user_zongti.add(jta_zong.get(i)); answer_all.append(jta_timu.get(i)); answer_all.append(" "); } num_answer.setText("第 " + answer_count + " 题"); jta.setText(jta_timu.get(answer_count - 1)); answer_count++; } }); jb_next.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) { String temp; temp = jta_answer.getText(); if (jta.getText().equals("")) { JOptionPane.showMessageDialog(null, "错误,请导入题库", "错误", JOptionPane.ERROR_MESSAGE); return; } jta_answer.setText(""); if (answer_count <= 10) { if (isInteger(temp)) { user_answer.add(temp); System.out.println("选择否后执行的代码" + temp + "user_size" + user_answer.size()); num_answer.setText("第 " + answer_count + " 题"); jta.setText(jta_timu.get(answer_count - 1)); answer_count++; } else { JOptionPane.showMessageDialog(null, "错误", "请输入数字", JOptionPane.ERROR_MESSAGE); } } else { user_answer.add(temp); System.out.println("选择否后执行的代码" + temp + "user_size" + user_answer.size()); answer_fenshu = 0; for (int i = 0; i < user_answer.size(); i++) { if (user_answer.get(i).equals(true_answer.get(i))) answer_fenshu += 5; } user_fenshu.add(answer_fenshu); Object[] options = { "是", "取消" }; int res = JOptionPane.showOptionDialog(null, "是否查看成绩", "答题完毕", JOptionPane.DEFAULT_OPTION, JOptionPane.YES_NO_OPTION, null, options, options[0]); if (res == JOptionPane.YES_OPTION) { chart ct = new chart(user_fenshu); ct.setVisible(true); } else { Object[] option = { "是", "取消" }; int res1 = JOptionPane.showOptionDialog(null, "是否退出程序", "终止框", JOptionPane.DEFAULT_OPTION, JOptionPane.YES_NO_OPTION, null, option, option[0]); if (res1 == JOptionPane.YES_OPTION) { dispose(); System.exit(0); } else { } } } } }); item2.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { dispose(); System.exit(0); } }); } public static boolean isInteger(String str) { for (int i = str.length(); --i >= 0;) { if (!Character.isDigit(str.charAt(i))) { return false; } } return true; } }
任务3：本学期课程已结束，请汇总《面向对象程序设计课程学习进度条》的数据，统计个人专业能力提升的数据。并从学习内容、学习方法、学习心得几个方面进行课程学习总结，也希望你对课程的不足提出建议和意见。
学期学习总结：学习内容
Java语言特点与开发环境配置（第1章、第2章）
Java基本程序结构（第3章）
重点：Java面向对象程序结构（第4章、第5章、第6章）
类、类间关系、类图 ?
Java JDK预定义类/接口及其API（String-第3章、 Arrays-第3章、Files-第3章62页、LocalDate-第4章、 Object-第5章、对象包装器-第5章、Comparator-第6章、 异常类-第7章、ArrayList-第5+8章、第9章、第10-12章、 第14章）
— Java异常处理编程模型
— Java GUI编程模型 ?
Java并发程序设计（第14章） ?
Java应用程序部署（第13章）
学习方法：
1.理论课：老师课堂讲解基础知识
2.实验课：老师和助教学长演示程序并进行讲解。
3.课下自主学习：
（1）结合课本内容和相关的示例程序，并自主查阅资料，完成编程练习。
（2）编程练习完成后，助教进行答疑讲解；老师根据作业中的问题，在课堂上进行讲解。
学习心得：
通过本学期的学习，我从一开始的对Java完全没有概念到慢慢的了解并学习到它的应用，但仍感觉在知识的边缘探索，
没有很深入的学习到它的真正运用价值，虽然在理论上的学习尚且能听懂，但还是不会将它应用到编程中，实现一个问题的解决程序。
老师和学长还介绍了Java在未来的学习方向和发展，日后还是很有必要更深入更熟练的去学习运用Java知识。
个人认为老师的教学方式很好，在讲解示例代码之后再让我们去通过运行结果学习每一个细节是通过什么方法来实现的，希望老师可以在课堂上多讲一点示例程序。
最后，由衷感谢老师的谆谆教导和学长的耐心讲解，让我收获到了很多有用的知识和道理。
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