201772020113 李清華《面向物件程式設計（java）》第18周學習總結
阿新 • • 發佈：2018-12-30
1、實驗目的與要求
(1) 綜合掌握java基本程式結構；
(2) 綜合掌握java面向物件程式設計特點；
(3) 綜合掌握java GUI 程式設計結構；
(4) 綜合掌握java多執行緒程式設計模型；
(5) 綜合程式設計練習。
2、實驗內容和步驟
任務1：填寫課程課後調查問卷，網址：https://www.wjx.cn/jq/33108969.aspx。
任務2：綜合程式設計練習
練習1：設計一個使用者資訊採集程式，要求如下：
（1） 使用者資訊輸入介面如下圖所示:
（1）使用者點選提交按鈕時，使用者輸入資訊顯示控制檯介面；
（2）使用者點選重置按鈕後，清空使用者已輸入資訊；
（3）點選視窗關閉，程式退出。
1 package fff; 2 import java.awt.EventQueue; 3 4 import javax.swing.JFrame; 5 6 public class Main { 7 public static void main(String[] args) { 8 EventQueue.invokeLater(() -> { 9 DemoJFrame page = new DemoJFrame(); 10 }); 11 }View Code12 }
1 package fff; 2 import java.awt.Dimension; 3 import java.awt.Toolkit; 4 import java.awt.Window; 5 6 public class WinCenter { 7 public static void center(Window win){ 8 Toolkit tkit = Toolkit.getDefaultToolkit(); 9 Dimension sSize = tkit.getScreenSize();View Code10 Dimension wSize = win.getSize(); 11 if(wSize.height > sSize.height){ 12 wSize.height = sSize.height; 13 } 14 if(wSize.width > sSize.width){ 15 wSize.width = sSize.width; 16 } 17 win.setLocation((sSize.width - wSize.width)/ 2, (sSize.height - wSize.height)/ 2); 18 } 19 }
1 package fff; 2 import java.awt.*; 3 import java.awt.event.*; 4 import javax.swing.*; 5 import javax.swing.border.*; 6 public class DemoJFrame extends JFrame { 7 public DemoJFrame() { 8 JPanel panel1 = new JPanel(); 9 panel1.setPreferredSize(new Dimension(700, 45)); 10 panel1.setLayout(new GridLayout(1, 4)); 11 JLabel label1 = new JLabel("Name:"); 12 JTextField j1 = new JTextField(""); 13 JLabel label2 = new JLabel("Qualification:"); 14 JComboBox<Object> j2 = new JComboBox<>(); 15 j2.addItem("chuzhong"); 16 j2.addItem("gaozhong"); 17 j2.addItem("undergraduate"); 18 panel1.add(label1); 19 panel1.add(j1); 20 panel1.add(label2); 21 panel1.add(j2); 22 23 JPanel panel2 = new JPanel(); 24 panel2.setPreferredSize(new Dimension(700, 65)); 25 panel2.setLayout(new GridLayout(1, 4)); 26 JLabel label3 = new JLabel("Address:"); 27 JTextArea j3 = new JTextArea(); 28 JLabel label4 = new JLabel("Hobby:"); 29 JPanel p = new JPanel(); 30 p.setLayout(new GridLayout(3, 1)); 31 p.setBorder(BorderFactory.createLineBorder(null)); 32 JCheckBox c1 = new JCheckBox("Reading"); 33 JCheckBox c2 = new JCheckBox("Singing"); 34 JCheckBox c3 = new JCheckBox("Dancing"); 35 p.add(c1); 36 p.add(c2); 37 p.add(c3); 38 panel2.add(label3); 39 panel2.add(j3); 40 panel2.add(label4); 41 panel2.add(p); 42 43 JPanel panel3 = new JPanel(); 44 panel3.setPreferredSize(new Dimension(700, 150)); 45 FlowLayout flowLayout1 = new FlowLayout(FlowLayout.LEFT, 70, 40); 46 panel3.setLayout(flowLayout1); 47 JLabel label5 = new JLabel("Sex:"); 48 JPanel p1 = new JPanel(); 49 p1.setLayout(new GridLayout(2,1)); 50 p1.setBorder(BorderFactory.createLineBorder(null)); 51 ButtonGroup bu = new ButtonGroup(); 52 JRadioButton jr1 = new JRadioButton("Male"); 53 JRadioButton jr2 = new JRadioButton("Female"); 54 bu.add(jr1); 55 bu.add(jr2); 56 p1.add(jr1); 57 p1.add(jr2); 58 panel3.add(label5); 59 panel3.add(p1); 60 add(panel1); 61 add(panel2); 62 add(panel3); 63 64 JPanel panel4 = new JPanel(); 65 panel4.setPreferredSize(new Dimension(700, 150)); 66 JButton b1 = new JButton("Validate"); 67 panel4.add(b1); 68 JButton b2 = new JButton("Reset"); 69 panel4.add(b2); 70 add(panel4); 71 72 FlowLayout flowLayout = new FlowLayout(); 73 this.setLayout(flowLayout); 74 this.setTitle("Students Detail"); 75 this.setBounds(300, 300, 800, 400); 76 this.setVisible(true); 77 this.setDefaultCloseOperation(DISPOSE_ON_CLOSE); 78 79 b1.addActionListener(new ActionListener() { 80 81 82 public void actionPerformed(ActionEvent e) { 83 // TODO 自動生成的方法存根 84 String xueli = j2.getSelectedItem().toString(); 85 System.out.println("Name:" + j1.getText()); 86 System.out.println("Qualification:" + xueli); 87 String hobbystring = "Hobby:"; 88 if (c1.isSelected()) { 89 hobbystring += "Reading"; 90 } 91 if (c2.isSelected()) { 92 hobbystring += "Singing"; 93 } 94 if (c3.isSelected()) { 95 hobbystring += "Dancing"; 96 } 97 System.out.println("Address:" + j3.getText()); 98 if (jr1.isSelected()) { 99 System.out.println("Sex:Male"); 100 } 101 if (jr2.isSelected()) { 102 System.out.println("Sex:Female"); 103 } 104 System.out.println(hobbystring); 105 } 106 }); 107 b2.addActionListener(new ActionListener() { 108 109 public void actionPerformed(ActionEvent e) { 110 // TODO 自動生成的方法存根 111 j1.setText(null); 112 j3.setText(null); 113 j2.setSelectedIndex(0); 114 c1.setSelected(false); 115 c2.setSelected(false); 116 c3.setSelected(false); 117 bu.clearSelection(); 118 } 119 }); 120 } 121 122 public static void main(String args[]) { 123 new DemoJFrame(); 124 } 125 126 }View Code
練習2：採用GUI介面設計以下程式：
l 編制一個程式，將身份證號.txt 中的資訊讀入到記憶體中；
l 按姓名字典序輸出人員資訊；
l 查詢最大年齡的人員資訊；
l 查詢最小年齡人員資訊；
l 輸入你的年齡，查詢身份證號.txt中年齡與你最近人的姓名、身份證號、年齡、性別和出生地；
l 查詢人員中是否有你的同鄉。
l 輸入身份證資訊，查詢所提供身份證號的人員資訊，要求輸入一個身份證數字時，查詢介面就顯示滿足查詢條件的查詢結果，且隨著輸入的數字的增多，查詢匹配的範圍逐漸縮小。
1 package Demo; 2 3 import java.awt.*; 4 import javax.swing.*; 5 6 public class ButtonTest { 7 public static void main(String[] args) { 8 EventQueue.invokeLater(() -> { 9 JFrame frame = new Main(); 10 frame.setTitle("身份證"); 11 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 12 frame.setVisible(true); 13 }); 14 } 15 }View Code
1 package Demo; 2 3 import java.io.BufferedReader; 4 import java.io.File; 5 import java.io.FileInputStream; 6 import java.io.InputStreamReader; 7 import java.io.FileNotFoundException; 8 import java.io.IOException; 9 import java.util.ArrayList; 10 import java.util.Arrays; 11 import java.util.Collections; 12 import java.util.Scanner; 13 import java.awt.*; 14 import javax.swing.*; 15 import java.awt.event.*; 16 17 public class Main extends JFrame { 18 private static ArrayList<Student> studentlist; 19 private static ArrayList<Student> list; 20 private JPanel panel; 21 private JPanel buttonPanel; 22 private static final int DEFAULT_WITH = 600; 23 private static final int DEFAULT_HEIGHT = 300; 24 25 public Main() { 26 studentlist = new ArrayList<>(); 27 Scanner scanner = new Scanner(System.in); 28 File file = new File("studentfile.txt"); 29 try { 30 FileInputStream fis = new FileInputStream(file); 31 BufferedReader in = new BufferedReader(new InputStreamReader(fis)); 32 String temp = null; 33 while ((temp = in.readLine()) != null) { 34 35 Scanner linescanner = new Scanner(temp); 36 37 linescanner.useDelimiter(" "); 38 String name = linescanner.next(); 39 String number = linescanner.next(); 40 String sex = linescanner.next(); 41 String age = linescanner.next(); 42 String province = linescanner.nextLine(); 43 Student student = new Student(); 44 student.setName(name); 45 student.setnumber(number); 46 student.setsex(sex); 47 int a = Integer.parseInt(age); 48 student.setage(a); 49 student.setprovince(province); 50 studentlist.add(student); 51 52 } 53 } catch (FileNotFoundException e) { 54 System.out.println("學生資訊檔案找不到"); 55 e.printStackTrace(); 56 } catch (IOException e) { 57 System.out.println("學生資訊檔案讀取錯誤"); 58 e.printStackTrace(); 59 } 60 panel = new JPanel(); 61 panel.setLayout(new BorderLayout()); 62 JTextArea jt = new JTextArea(); 63 panel.add(jt); 64 add(panel, BorderLayout.NORTH); 65 66 buttonPanel = new JPanel(); 67 buttonPanel.setLayout(new GridLayout(1, 7)); 68 JButton jButton = new JButton("字典排序"); 69 JButton jButton1 = new JButton("年齡最大和年齡最小"); 70 JLabel lab = new JLabel("猜猜你的老鄉"); 71 JTextField jt1 = new JTextField(); 72 JLabel lab1 = new JLabel("找找同齡人（年齡相近）："); 73 JTextField jt2 = new JTextField(); 74 JLabel lab2 = new JLabel("輸入你的身份證號碼："); 75 JTextField jt3 = new JTextField(); 76 JButton jButton2 = new JButton("退出"); 77 78 jButton.addActionListener(new ActionListener() { 79 public void actionPerformed(ActionEvent e) { 80 Collections.sort(studentlist); 81 jt.setText(studentlist.toString()); 82 } 83 }); 84 jButton1.addActionListener(new ActionListener() { 85 public void actionPerformed(ActionEvent e) { 86 int max = 0, min = 100; 87 int j, k1 = 0, k2 = 0; 88 for (int i = 1; i < studentlist.size(); i++) { 89 j = studentlist.get(i).getage(); 90 if (j > max) { 91 max = j; 92 k1 = i; 93 } 94 if (j < min) { 95 min = j; 96 k2 = i; 97 } 98 99 } 100 jt.setText("年齡最大：" + studentlist.get(k1) + "年齡最小：" + studentlist.get(k2)); 101 } 102 }); 103 jButton2.addActionListener(new ActionListener() { 104 public void actionPerformed(ActionEvent e) { 105 dispose(); 106 System.exit(0); 107 } 108 }); 109 jt1.addActionListener(new ActionListener() { 110 public void actionPerformed(ActionEvent e) { 111 String find = jt1.getText(); 112 String text = ""; 113 String place = find.substring(0, 3); 114 for (int i = 0; i < studentlist.size(); i++) { 115 if (studentlist.get(i).getprovince().substring(1, 4).equals(place)) { 116 text += "\n" + studentlist.get(i); 117 jt.setText("老鄉：" + text); 118 } 119 } 120 } 121 }); 122 jt2.addActionListener(new ActionListener() { 123 public void actionPerformed(ActionEvent e) { 124 String yourage = jt2.getText(); 125 int a = Integer.parseInt(yourage); 126 int near = agenear(a); 127 int value = a - studentlist.get(near).getage(); 128 jt.setText("年齡相近：" + studentlist.get(near)); 129 } 130 }); 131 132 jt3.addKeyListener(new KeyAdapter() { 133 public void keyTyped(KeyEvent e) { 134 list = new ArrayList<>(); 135 Collections.sort(studentlist); 136 String key = jt3.getText(); 137 138 for (int i = 1; i < studentlist.size(); i++) { 139 if (studentlist.get(i).getnumber().contains(key)) { 140 list.add(studentlist.get(i)); 141 jt.setText("emmm！你可能是：\n" + list); 142 } 143 } 144 } 145 146 }); 147 buttonPanel.add(jButton); 148 buttonPanel.add(jButton1); 149 buttonPanel.add(lab); 150 buttonPanel.add(jt1); 151 buttonPanel.add(lab1); 152 buttonPanel.add(jt2); 153 buttonPanel.add(lab2); 154 buttonPanel.add(jt3); 155 buttonPanel.add(jButton2); 156 add(buttonPanel, BorderLayout.SOUTH); 157 setSize(DEFAULT_WITH, DEFAULT_HEIGHT); 158 } 159 160 public static int agenear(int age) { 161 int min = 53, value = 0, k = 0; 162 for (int i = 0; i < studentlist.size(); i++) { 163 value = studentlist.get(i).getage() - age; 164 if (value < 0) 165 value = -value; 166 if (value < min) { 167 min = value; 168 k = i; 169 } 170 } 171 return k; 172 } 173 174 }View Code
1 package Demo; 2 3 public class Student implements Comparable<Student> { 4 5 private String name; 6 private String number ; 7 private String sex ; 8 private int age; 9 private String province; 10 11 public String getName() { 12 return name; 13 } 14 public void setName(String name) { 15 this.name = name; 16 } 17 public String getnumber() { 18 return number; 19 } 20 public void setnumber(String number) { 21 this.number = number; 22 } 23 public String getsex() { 24 return sex ; 25 } 26 public void setsex(String sex ) { 27 this.sex =sex ; 28 } 29 public int getage() { 30 31 return age; 32 } 33 public void setage(int age) { 34 // int a = Integer.parseInt(age); 35 this.age= age; 36 } 37 38 public String getprovince() { 39 return province; 40 } 41 public void setprovince(String province) { 42 this.province=province ; 43 } 44 45 public int compareTo(Student o) { 46 return this.name.compareTo(o.getName()); 47 } 48 49 public String toString() { 50 return name+"\t"+sex+"\t"+age+"\t"+number+"\t"+province+"\n"; 51 } 52 }View Code
練習3：採用GUI介面設計以下程式
l 編寫一個計算器類，可以完成加、減、乘、除的操作
l 利用計算機類，設計一個小學生100以內數的四則運算練習程式，由計算機隨機產生10道加減乘除練習題，學生輸入答案，由程式檢查答案是否正確，每道題正確計10分，錯誤不計分，10道題測試結束後給出測試總分；
l 將程式中測試練習題及學生答題結果輸出到檔案，檔名為test.txt。
1 package ui_test; 2 3 public class Main { 4 5 public static void main(String[] args) { 6 MyExGUI lg = new MyExGUI(); 7 //new MyExGUI(); 8 9 } 10 11 }View Code
1 import java.awt.*; 2 import java.awt.event.ActionEvent; 3 import java.awt.event.ActionListener; 4 import java.io.BufferedOutputStream; 5 import java.io.File; 6 import java.io.FileOutputStream; 7 import java.io.IOException; 8 import java.util.ArrayList; 9 10 import javax.swing.*; 11 12 public class MyExGUI extends JFrame { 13 ArrayList<String> user_zongti = new ArrayList<String>(); 14 ArrayList<String> user_zonganswer = new ArrayList<String>(); 15 ArrayList<String> user_answer = new ArrayList<String>(); 16 ArrayList<String> true_answer = new ArrayList<String>(); 17 ArrayList<String> jta_timu = new ArrayList<String>(); 18 ArrayList<String> jta_zong = new ArrayList<String>(); 19 ArrayList<Integer> user_fenshu = new ArrayList<Integer>(); 20 JMenuBar jm; // 選單條元件 21 JMenu menu;// 選單 22 JMenuItem item1, item2;// 選單項 23 JMenu build; // 二級選單 24 JMenuItem file, project; 25 TextArea answer_all = new TextArea(); 26 TextField jta = new TextField(); 27 TextField jta_answer = new TextField(); 28 JLabel num_answer = new JLabel(); 29 JLabel answer; 30 JToolBar jtb;// 工具條 31 JButton jb1, jb2, jb3, jb4, jb5, jb6, jb7, jb_next; 32 int answer_count; 33 int answer_fenshu; 34 35 public MyExGUI() { 36 // 建立選單 37 jm = new JMenuBar(); 38 39 menu = new JMenu("檔案(F)"); 40 menu.setMnemonic('f'); // 助記符 41 42 build = new JMenu("新建"); 43 44 file = new JMenuItem("檔案"); 45 project = new JMenuItem("答題"); 46 item1 = new JMenuItem("儲存(S)"); 47 item2 = new JMenuItem("退出"); 48 49 answer = new JLabel("第 1 題"); 50 51 // 新增選單項至選單上 52 build.add(file); 53 build.add(project); 54 55 menu.add(build); 56 menu.add(item1); 57 menu.add(item2); 58 menu.addSeparator(); 59 // 將選單加入至選單欄 60 jm.add(menu); 61 62 JPanel contentPanel = new JPanel(); 63 contentPanel.setLayout(null); 64 JLabel daan = new JLabel("答案"); 65 JLabel dengyu = new JLabel("="); 66 num_answer = answer; 67 num_answer.setFont(new Font("宋體", Font.BOLD, 22)); 68 jb_next = new JButton("下一題"); 69 jta.setFont(new Font("宋體", Font.BOLD, 22)); 70 jta_answer.setFont(new Font("宋體", Font.BOLD, 22)); 71 jb_next.setFont(new Font("宋體", Font.BOLD, 22)); 72 daan.setFont(new Font("宋體", Font.BOLD, 22)); 73 dengyu.setFont(new Font("宋體", Font.BOLD, 22)); 74 75 contentPanel.add(num_answer); 76 contentPanel.add(daan); 77 contentPanel.add(dengyu); 78 contentPanel.add(jta); 79 80 contentPanel.add(jta_answer); 81 contentPanel.add(answer_all); 82 contentPanel.add(jb_next); 83 84 num_answer.setBounds(90, 20, 130, 50); 85 daan.setBounds(250, 20, 90, 50); 86 jta.setBounds(50, 70, 150, 30); 87 dengyu.setBounds(205, 70, 20, 20); 88 jta_answer.setBounds(230, 70, 100, 30); 89 jb_next.setBounds(350, 70, 110, 30); 90 answer_all.setBounds(50, 120, 400, 300); 91 92 this.setJMenuBar(jm); // 新增選單欄，不能設定位置，會自動放在最上部 93 this.add(contentPanel); 94 95 this.setTitle("線上答題系統"); 96 this.setSize(600, 500); 97 this.setVisible(true); 98 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 99 item1.addActionListener(new ActionListener() { 100 public void actionPerformed(ActionEvent arg0) { 101 FileOutputStream outSTr = null; 102 BufferedOutputStream Buff = null; 103 boolean flag = true; 104 File file; 105 // String test ; 106 do { 107 // test = "test"+count; 108 109 String inputValue = JOptionPane.showInputDialog("Please input file name"); 110 file = new File(inputValue + "test.txt"); 111 if (!file.exists()) { 112 // 建立檔案 113 try { 114 115 flag = file.createNewFile(); 116 117 } catch (IOException e) { 118 e.printStackTrace(); 119 120 } 121 flag = false; 122 } else { 123 124 JOptionPane.showMessageDialog(null, "該檔名已存在，請重新輸入", "ERROR", JOptionPane.ERROR_MESSAGE); 125 flag = true; 126 } 127 } while (flag); 128 // 寫入檔案 129 String u_answer; 130 try { 131 outSTr = new FileOutputStream(file); 132 Buff = new BufferedOutputStream(outSTr); 133 System.out.println("選擇是後執行的程式碼" + user_zongti.size() + user_answer.size()); 134 for (int i = 0; i < user_zongti.size(); i++) { 135 try { 136 Buff.write(user_zongti.get(i).getBytes()); 137 Buff.write(" ".getBytes()); 138 u_answer = user_answer.get(i); 139 if (u_answer.equals("")) 140 u_answer = "沒有作答"; 141 142 Buff.write(u_answer.getBytes()); 143 Buff.write("\r\n".getBytes()); 144 } catch (IOException e) { 145 e.printStackTrace(); 146 i--; 147 } 148 } 149 Buff.flush(); 150 Buff.close(); 151 152 } catch (IOException e) { 153 e.printStackTrace(); 154 } 155 try { 156 outSTr.close(); 157 } catch (IOException e) { 158 e.printStackTrace(); 159 } 160 user_zongti.clear(); 161 user_answer.clear(); 162 } 163 }); 164 165 project.addActionListener(new ActionListener() { 166 public void actionPerformed(ActionEvent arg0) { 167 arithmetic art = new arithmetic(); 168 true_answer = art.list_answer; 169 jta_timu = art.list_timu; 170 jta_zong = art.list; 171 answer_count = 1; 172 answer_all.setText(""); 173 for (int i = 0; i < art.list_timu.size(); i++) { 174 user_zongti.add(jta_zong.get(i)); 175 answer_all.append(jta_timu.get(i)); 176 answer_all.append("\r\n"); 177 } 178 num_answer.setText("第 " + answer_count + " 題"); 179 jta.setText(jta_timu.get(answer_count - 1)); 180 answer_count++; 181 182 } 183 }); 184 jb_next.addActionListener(new ActionListener() { 185 public void actionPerformed(ActionEvent arg0) { 186 String temp; 187 temp = jta_answer.getText(); 188 189 if (jta.getText().equals("")) { 190 JOptionPane.showMessageDialog(null, "錯誤,請匯入題庫", "錯誤", JOptionPane.ERROR_MESSAGE); 191 return; 192 } 193 jta_answer.setText(""); 194 if (answer_count <= 10) { 195 if (isInteger(temp)) { 196 197 user_answer.add(temp); 198 System.out.println("選擇否後執行的程式碼" + temp + "user_size" + user_answer.size()); 199 num_answer.setText("第 " + answer_count + " 題"); 200 jta.setText(jta_timu.get(answer_count - 1)); 201 answer_count++; 202 } else { 203 JOptionPane.showMessageDialog(null, "錯誤", "請輸入數字", JOptionPane.ERROR_MESSAGE); 204 } 205 } else { 206 user_answer.add(temp); 207 System.out.println("選擇否後執行的程式碼" + temp + "user_size" + user_answer.size()); 208 answer_fenshu = 0; 209 for (int i = 0; i < user_answer.size(); i++) { 210 if (user_answer.get(i).equals(true_answer.get(i))) 211 answer_fenshu += 5; 212 } 213 user_fenshu.add(answer_fenshu); 214 Object[] options = { "是", "取消" }; 215 int res = JOptionPane.showOptionDialog(null, "是否檢視成績", "答題完畢", JOptionPane.DEFAULT_OPTION, 216 JOptionPane.YES_NO_OPTION, null, options, options[0]); 217 if (res == JOptionPane.YES_OPTION) { 218 chart ct = new chart(user_fenshu); 219 ct.setVisible(true); 220 221 } else { 222 Object[] option = { "是", "取消" }; 223 int res1 = JOptionPane.showOptionDialog(null, "是否退出程式", "終止框", JOptionPane.DEFAULT_OPTION, 224 JOptionPane.YES_NO_OPTION, null, option, option[0]); 225 226 if (res1 == JOptionPane.YES_OPTION) { 227 dispose(); 228 System.exit(0); 229 230 } else { 231 232 } 233 234 } 235 236 } 237 238 } 239 }); 240 241 item2.addActionListener(new ActionListener() { 242 public void actionPerformed(ActionEvent e) { 243 dispose(); 244 System.exit(0); 245 } 246 }); 247 248 } 249 250 public static boolean isInteger(String str) { 251 for (int i = str.length(); --i >= 0;) { 252 if (!Character.isDigit(str.charAt(i))) { 253 return false; 254 } 255 } 256 return true; 257 } 258 259 }View Code
1 import java.io.BufferedOutputStream; 2 import java.io.File; 3 import java.io.FileOutputStream; 4 import java.io.IOException; 5 import java.util.ArrayList; 6 import java.util.Random; 7 import java.util.Scanner; 8 9 public class arithmetic { 10 ArrayList<String> list = new ArrayList<String>(); 11 ArrayList<String> list_timu = new ArrayList<String>(); 12 ArrayList<String> list_answer = new ArrayList<String>(); 13 14 public arithmetic() { 15 FileOutputStream outSTr = null; 16 BufferedOutputStream Buff = null; 17 int number_n = 10, count; 18 19 ArrayList<String> list_temp = new ArrayList<String>(); 20 String[] operator = new String[] { "+", "-", "*", "/" }; 21 22 Random rand = new Random(); 23 File file1 = new File("test.txt"); 24 if (file1.exists()) { 25 // 建立檔案 26 try { 27 file1.createNewFile(); 28 } catch (IOException e) { 29 e.printStackTrace(); 30 } 31 } 32 33 while (number_n > 0) { 34 int[] number_temp = new int[rand.nextInt(2) + 3]; 35 String[] str_temp = new String[number_temp.length - 1]; 36 for (int i = 0; i < number_temp.length; i++) { 37 if (i < number_temp.length - 1) { 38 number_temp[i] = rand.nextInt(100); 39 list_temp.add(String.valueOf(number_temp[i])); 40 str_temp[i] = operator[rand.nextInt(4)]; 41 list_temp.add(str_temp[i]); 42 43 } 44 45 else { 46 number_temp[i] = rand.nextInt(100); 47 list_temp.add(String.valueOf(number_temp[i])); 48 } 49 } 50 51 count = calculate_RPN(produce_RPN(list_temp)); 52 if (count != -1) { 53 list_timu.add(transform_string(list_temp)); 54 list_answer.add(String.valueOf(count)); 55 list_temp.add(" = " + count); 56 list.add(transform_string(list_temp)); 57 number_n--; 58 list_temp.clear(); 59 } else 60 list_temp.clear(); 61 System.out.println(number_n); 62 63 } 64 try { 65 outSTr = new FileOutputStream(file1); 66 Buff = new BufferedOutputStream(outSTr); 67 for (int i = 0; i < list.size(); i++) { 68 try { 69 Buff.write(list.get(i).getBytes()); 70 Buff.write("\r\n".getBytes()); 71 } catch (IOException e) { 72 e.printStackTrace(); 73 i--; 74 } 75 } 76 Buff.flush(); 77 Buff.close(); 78 79 } catch (IOException e) { 80 e.printStackTrace(); 81 } 82 // Buff.close(); 83 try { 84 outSTr.close(); 85 } catch (IOException e) { 86 e.printStackTrace(); 87 } 88 89 for (int i = 0; i < list.size(); i++) { 90 System.out.print(list.get(i)); 91 System.out.println(); 92 } 93 System.out.print("計算完畢！"); 94 95 } 96 97 public static int calculate_RPN(ArrayList<String> list_temp) { 98 int i = 0, t; 99 double a = 0, b = 0; 100 String l_temp; 101 Stack sk = new Stack(10); 102 for (t = 0; t < list_temp.size(); t++) { 103 l_temp = list_temp.get(i++); 104 if (!isInteger(l_temp)) { 105 b = sk.mypop(); 106 a = sk.mypop(); 107 switch (l_temp) { 108 case "+": 109 sk.mypush(a + b); 110 break; 111 case "-": 112 if(!(a<b)) { 113 sk.mypush(a - b); 114 } 115 else 116 return -1; 117 break; 118 case "*": 119 sk.mypush(a * b); 120 break; 121 case "/": 122 if (b == 0||a<b) 123 return -1; 124 sk.mypush(a / b); 125 break; 126 } 127 System.out.println("st.mytop: " + sk.mypeek()); 128 } else { 129 sk.mypush((double) Integer.parseInt(l_temp)); 130 } 131 132 } 133 if (!sk.myisempty()) { 134 a = sk.mypop(); 135 b = a - (int) a; 136 System.out.println("a: " + a); 137 if (a > 0 && b == 0) { 138 return (int) a; 139 } else 140 return -1; 141 } else 142 return -1; 143 144 } 145 146 public static ArrayList<String> produce_RPN(ArrayList<String> list_temp) { 147 int t = 0, i = 0; 148 String tmp; 149 Tack mytack = new Tack(10); 150 ArrayList<String> lt_temp = new ArrayList<String>(); 151 while (true) { 152 tmp = list_temp.get(i++); 1