练习题.实现简单的电子词典功能

java初学者所写，有待改进

【题目】.实现简单的电子词典功能。

a.能记录新的单词和解释。
b.能查询单词的解释。
c.能从单词库中随机抽取10个单词，进行测试。（可以是显示单词，要求输入解释，也可反过来）
  最后给出对错的个数和正确答案。

d.所有操作在控制台，用命令完成。
提示：使用Properties，并把添加的单词永久保持到文件中。

举例：
c:\>java MyWord
c:\>请选择功能：1-添加单词，2-查询单词，3-单词测试，0-退出
c:\>1
c:\>请输入单词：
c:\>cat
c:\>请输入解释：
c:\>猫
c:\>成功添加单词。是否继续？Y/N
如果 c:\>Y -> 13行
如果 c:\>N -> 11行

c:\>2
c:\>请输入单词：
c:\>cat
c:\>cat的解释为：猫

c:\>3
c:\>cat的解释：
c:\>猫
c:\>狗的单词是：
c:\>dog

...最后给出对了多少个，并把错误的答案显示。

第二份代码为修改后的。

代码如下：

import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.ArrayList;import java.util.Properties;import java.util.Random;import java.util.Scanner;import java.util.Set;import java.util.zip.Inflater;public class DictionaryTest {public static void main(String[] args) throws IOException {WordManage wm = new WordManage();Scanner sc = new Scanner(System.in);while(true){System.out.println("\tjava MyWord");System.out.println("1.增添单词");System.out.println("2.查询单词");System.out.println("3.单词测试");System.out.println("0.安全退出");System.out.println("请输入相应的数字进行对应的操作：");int num = sc.nextInt();if(num == 1){wm.addWord();}else if(num == 2){wm.query();}else if(num == 3){wm.test();}else if(num ==0){System.out.println("已正常退出!");System.exit(0);}else{System.out.println("输入错误，请重新输入!");}}}}class WordManage{private Properties prop ;//创建构造函数，初始化成员变量public WordManage() throws IOException{prop = new Properties();}//加入单词public void addWord() throws IOException{InputStream is = new FileInputStream("D:/test/word.txt"); prop.load(is);OutputStream os = new FileOutputStream("D:/test/word.txt"); Scanner sc = new Scanner(System.in);System.out.print("请输入单词：");String str = sc.next();System.out.print("请输入解释：");String explain = sc.next();prop.put(str,explain);prop.store(os, "My save");os.close(); is.close();System.out.println("成功加入单词，是否继续？Y/N");String yn = sc.next();if(yn.equals("Y")){//加单词addWord();}}//查询单词public void query() throws IOException{System.out.println("请输入单词：");Scanner sc = new Scanner(System.in);String str = sc.next();InputStream is = new FileInputStream("D:/test/word.txt");prop.load(is);int flag = 0;for (Object key : prop.keySet()) { if(str.equals(key)){System.out.println(key + "的解释为：" + prop.get(key)); flag = 1;break;}}if(flag == 0){System.out.println("词库没有此单词！");}}//单词测试public void test() throws IOException{InputStream is = new FileInputStream("D:/test/word.txt");prop.load(is); Set<Object> key = prop.keySet(); int size = key.size(); ArrayList al= new ArrayList(); ArrayList<String> wroAnswer =new ArrayList<String>();  Random rd = new Random(); for(int i=0; i<5; i++){ int data = rd.nextInt(size); while(al.contains(data)){ data = rd.nextInt(size); } al.add(data); } int rightTotal = 0; int t = rd.nextInt(size);for(int i = 0; i<5; i++){Random r = new Random();int temp = r.nextInt(2);int bk = 0;int j = (Integer) al.get(i);if(temp == 0){//cat的解释：for (Object k : prop.keySet()) { if(j == bk){System.out.println(k + "的解释：");Scanner sc = new Scanner(System.in);String explain = sc.next();if(explain.equals(prop.get(k))){rightTotal++;}else{wroAnswer.add(k+"的正确解释为："+prop.get(k));}break;}bk++;}}else{//狗的单词是：for (Object k : prop.keySet()) { if(j == bk){System.out.println(prop.get(k)+ "的单词是：");Scanner sc = new Scanner(System.in);String str = sc.next();if(str.equals(k)){rightTotal++;}else{wroAnswer.add(prop.get(k)+ "的正确单词是："+k);}break;}bk++;}}}System.out.println("您答对的个数为："+rightTotal+"个");if(rightTotal!=5){System.out.println("纠错如下：");/*for(String k: wroAnswer){System.out.println(k);}*/System.out.println(wroAnswer);}}}

修改后代码r如下：

import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.util.ArrayList;import java.util.Collections;import java.util.Properties;import java.util.Random;import java.util.Scanner;import java.util.Set;public class Dictionary {private static Properties pps = new Properties();private File file;public Dictionary(){file = new File("src/res/words.properties");loadProperties();}// 1.实现通过控制台添加新的单词public void addWord(Scanner sc) {boolean b = true;while (b) {System.out.println("请输入单词:");String key = sc.nextLine();System.out.println("请输入解释:");String value = sc.nextLine();if (pps.containsKey(key)) {System.out.println("单词已经存在!请从新输入。");} else {pps.setProperty(key, value);System.out.print("成功添加单词。");while (true) {System.out.println("是否继续？Y/N");String yn = sc.nextLine();if ("N".equals(yn)) {b = false;break;} else if ("Y".equals(yn)) {break;} else {System.out.println("输入有误!");}}}}}//2.查询单词public void findWord(Scanner sc){boolean b = true;while(b){System.out.println("请输入单词：");String key = sc.nextLine();String value = pps.getProperty(key);if(value != null){System.out.println(key + "单词的解释为：" + value);}else{System.out.println("没有找到此单词!");}while (true) {System.out.println("是否继续？Y/N");String yn = sc.nextLine();if ("N".equals(yn)) {b = false;break;} else if ("Y".equals(yn)) {break;} else {System.out.println("输入有误!");}}}}//3.单词测试public void testWords(Scanner sc){Set<String> keys = pps.stringPropertyNames();ArrayList<String> list = new ArrayList<String>(keys);Collections.shuffle(list);//保存正确的个数int count = 0;//保持错误的键值字符串StringBuilder sbd = new StringBuilder();//Random rn = new Random();for(int i=0; i<10 && i<list.size(); i++){String key = list.get(i);String value = pps.getProperty(key);int num = rn.nextInt(10);if( (num % 2) == 0){System.out.println(key + "的对应解释是：");String s = sc.nextLine();if(value.equals(s)){count ++;}else{sbd.append(key);sbd.append("=");sbd.append(value);sbd.append(", ");}}else{System.out.print(value + "的对应单词是：" );String s = sc.nextLine();if(key.equals(s)){count ++;}else{sbd.append(key);sbd.append("=");sbd.append(value);sbd.append(", ");}}}System.out.println("正确的个数为：" + count);System.out.println("错误的单词解释为：");System.out.println(sbd);}// 保持属性列表中的内容到文件中public void saveProperties() {FileOutputStream fos = null;try {if (!file.exists()) {file.createNewFile();}fos = new FileOutputStream(file);pps.store(fos, null);} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {if (fos != null) {try {fos.close();} catch (IOException e) {e.printStackTrace();}}}}// 从文件中加载属性列表public void loadProperties() {try {if (file.exists()) {FileInputStream fis = new FileInputStream(file);pps.load(fis);}} catch (IOException e) {e.printStackTrace();}}public static void main(String[] args) {Dictionary hw = new Dictionary();boolean b = true;Scanner sc = new Scanner(System.in);while (b) {System.out.println("请选择功能：1-添加单词，2-查询单词，3-单词测试，0-退出");int s1 = sc.nextInt();switch (s1) {case 1:hw.addWord(sc);break;case 2:hw.findWord(sc);break;case 3:hw.testWords(sc);break;case 0:b = false;hw.saveProperties();System.out.println("成功退出程序!");break;default:System.out.println("输入有误！请重新选择。");}}}}