import java.io.; import java.util.; public class IdiomProcessor { public static void main(String[] args) { try { BufferedReader br = new BufferedReader(new FileReader("D:\yy\java\成语接龙\成语大全\去重后.txt")); List<String> idiomList = new ArrayList<>(); Map<Character, List<String>> idiomMap = new HashMap<>(); String line; while ((line = br.readLine()) != null) { String[] fields = line.split("拼音：|释义：|出处：|示例："); if (fields.length == 5) { String idiom = fields[0].trim(); idiomList.add(idiom); char lastChar = idiom.charAt(idiom.length()-1); if (!idiomMap.containsKey(lastChar)) { idiomMap.put(lastChar, new ArrayList<>()); } idiomMap.get(lastChar).add(idiom); } } br.close(); BufferedWriter bw = new BufferedWriter(new FileWriter("D:\yy\java\成语接龙\成语大全\全量成语处理后.txt")); br = new BufferedReader(new FileReader("D:\yy\java\成语接龙\成语大全\去重后.txt")); while ((line = br.readLine()) != null) { String[] fields = line.split("拼音：|释义：|出处：|示例："); if(fields.length==5) { String idiom = fields[0].trim(); char lastChar = idiom.charAt(idiom.length() - 1); int count=0; for(String nextIdiom:idiomMap.get(lastChar)) { if(nextIdiom.charAt(0) == lastChar) { count++; } } bw.write(line + "可接：" + count); bw.newLine(); } } bw.close(); br.close(); }catch (IOException e) { e.printStackTrace(); } } }修改这串代码，因为目前count无法正确统计可以接龙的成语数量

import java.awt.BorderLayout; import java.awt.EventQueue; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.util.HashMap; import java.util.Map; import javax.swing.JButton; import javax.swing.JFileChooser; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JList; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTextField; import javax.swing.ListSelectionModel; import javax.swing.border.EmptyBorder; public class SensitiveWordAnalyzer extends JFrame { private JPanel contentPane; private JTextField textFile; private JTextField textKeyword; private JList<String> listWords; private Map<String, Integer> wordMap; /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { SensitiveWordAnalyzer frame = new SensitiveWordAnalyzer(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the frame. */ public SensitiveWordAnalyzer() { setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(100, 100, 450, 300);分析这段代码

这段代码定义了一个名为SensitiveWordAnalyzer的Java GUI应用程序。该应用程序可以用来分析文本文件中的敏感词并统计它们出现的次数。应用程序包含一个JFrame窗口和几个Swing组件，包括JPanel、JTextField、JList、...

import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException; import java.util.LinkedList; public class ReverseFileReader { public static void main(String[] args) throws IOException { String fileName = "example.txt"; LinkedList<String> lines = new LinkedList<>(); try (BufferedReader reader = new BufferedReader(new FileReader(fileName))) { String line = null; while ((line = reader.readLine()) != null) { lines.addFirst(line); if (line.contains("friendList")) { break; } } } // 打印链表中的每一行 for (String line : lines) { System.out.println(line); } } }

2. 使用 BufferedReader 读取文件内容，将每一行内容添加到链表的头部。 3. 如果读取到包含字符串 "friendList" 的行，则停止读取。 4. 遍历链表，按顺序输出每一行的内容，即实现了倒序输出文件内容的功能。该...

import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.Socket; import java.util.Scanner; public class Client { public static void main(String[] args) { new Client().go();// 创建一个新的 client 对象，并调用 go() 方法 } public void go() { try { Socket sock = new Socket("127.0.0.1", 5000); InputStreamReader streamReader = new InputStreamReader(sock.getInputStream()); BufferedReader reader = new BufferedReader(streamReader); PrintWriter writer = new PrintWriter(sock.getOutputStream()); System.out.println("Connected to server."); System.out.println("请输入你想对服务端说的话:"); Thread readerThread = new Thread(new IncomingReader(reader)); readerThread.start(); Scanner userInput = new Scanner(System.in); while (true) { String message = userInput.nextLine(); writer.println(message); writer.flush(); } } catch (Exception ex) { ex.printStackTrace(); } } public class IncomingReader implements Runnable { BufferedReader reader; public IncomingReader(BufferedReader reader) { this.reader = reader; } public void run() { String message; try { while ((message = reader.readLine()) != null) { System.out.println(message); } } catch (Exception ex) { ex.printStackTrace(); } } } }请在原有代码的基础上添加对应的注释

public static void main(String[] args) { new Client().go(); // 创建一个新的 client 对象，并调用 go() 方法 } public void go() { try { Socket sock = new Socket("127.0.0.1", 5000); // 创建 Socket ...

java: 不兼容的类型: java.io.FileInputStream无法转换为java.lang.String

public static void main(String[] args) { String fileName = "example.txt"; try { File file = new File(fileName); Scanner scanner = new Scanner(file); String fileContent = scanner.useDelimiter("\\...

补全代码：nalysisResult.javaimport java.io.;import java.util.;public class AnalysisResult { public static void main(String args[]) { //使用循环按行读取文件 //调用Fenxi.getTotalScore（）获取解析出的总成绩，并写入scoreAnalysis.txt中 }}Fenxi.javaimport java.util.;public class Fenxi { public static double getTotalScore(String s) { String regex="[^0123456789]" ; //匹配非数字的正则表达式 String digitMess=s.replaceAll(regex,""); StringTokenizer fenxi = new StringTokenizer(digitMess,"*"); double totalScore=0; while(fenxi.hasMoreTokens()){ double score = Double.parseDouble(fenxi.nextToken()); //累加 totalScore } return totalScore; }}

public static void main(String args[]) { try { File file = new File("score.txt"); FileReader fileReader = new FileReader(file); BufferedReader bufferedReader = new BufferedReader(fileReader); ...

import java.io.BufferedReader;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import java.util.ArrayList;import java.util.Collections;import java.util.List;public class DataChooser { public static void main(String[] args) { List<String[]> dataList = new ArrayList<>(); try (BufferedReader br = new BufferedReader(new FileReader("data.txt"))) { String line; while ((line = br.readLine()) != null) { String[] data = line.split("\\s+"); // 判断数据是否符合要求，避免数组越界 if (data.length >= 5 && data[4].matches("\\d+")) { dataList.add(data); } } } catch (IOException e) { e.printStackTrace(); } // 使用 Collections.sort() 方法对 dataList 进行排序 Collections.sort(dataList, (o1, o2) -> Integer.compare(Integer.parseInt(o1[4]), Integer.parseInt(o2[4]))); try (FileWriter fw = new FileWriter("newData.txt")) { for (String[] data : dataList) { fw.write(String.join(" ", data) + System.lineSeparator()); } } catch (IOException e) { e.printStackTrace(); } // 打印最小的第五列的值 if (!dataList.isEmpty()) { int minValue = Integer.parseInt(dataList.get(0)[4]); System.out.println("最小的第五列的值为：" + minValue); } }}

然后它利用 BufferedReader 类读取 "data.txt" 文件中的每一行数据，并将每行数据按空格进行分割，保存到一个 String 数组中。接着程序判断该数组中数据的个数是否大于等于 5，且第五个元素是否为数字，如果满足条件...

import java.io.*; public class BufferedReaderTester { public static void main(String[] args) { String fileName="D://Hello.txt"; String line; try{ BufferedReader in =new BufferedReader(new FileReader(fileName)); line=in.readLine(); while(line!=null) { System.out.println(line); line=in.readLine();// TODO Auto-generated method stub } in.close(); } catch(IOException iox) { System.out.println("Problem reading"+fileName); } } }加入读出数据并显示的代码

public static void main(String[] args) { String fileName = "D://Hello.txt"; String line; List<String> lines = new ArrayList(); try { BufferedReader in = new BufferedReader(new FileReader...

import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.FileWriter; import java.text.SimpleDateFormat; import java.util.Date; import java.util.*; public class Main { public static void main(String[] args){ File Now = new File("C:\\Users\\YangPei\\Desktop\\20220390208杨沛.txt"); try { FileReader fileReader = new FileReader(Now); BufferedReader bufferedReader = new BufferedReader(fileReader); String NowString ; int line = 0; String []All = new String[2000]; while((NowString = bufferedReader.readLine()) != null) { All[line] = NowString; line++; } String []write = new String[100]; int Iline = 1; Date date = new Date(); SimpleDateFormat sdf4 = new SimpleDateFormat("yyyy年MM月dd日 HH时mm分ss秒"); write[0] = sdf4.format(date); Scanner scanner = new Scanner(System.in); do{ write[Iline] = scanner.nextLine(); Iline++; } while (!write[Iline-1].contains("@")); try { for(int i = 0;i<Iline;i++) { FileWriter writer = new FileWriter(Now, true); if(write[i].contains("@")) { write[i].replace("@",""); } writer.write(write[i]);//System.out.println("AAAAAAAAA"); } write.clone(); } catch (Exception e){} } catch (Exception e){} } } 无法写入文件

java try (FileWriter writer = new FileWriter(Now, true)) { for (int i = 0; i ; i++) { if (write[i].contains("@")) { write[i] = write[i].replace("@", ""); // 使用replace方法替换字符串并将其重新...

请解释java代码：import java.io.; import java.util.; public class Main { public static void main(String[] args) { File input = new File("C:\\Users\\28592\\Desktop\\score.txt"); File output = new File("C:\\Users\\28592\\Desktop\\scoreAnalysis.txt"); try { Writer out=new FileWriter(output); BufferedWriter bfw=new BufferedWriter(out); Reader in=new FileReader(input); BufferedReader bfr=new BufferedReader(in); String str=null; while(( str=bfr.readLine())!=null) { double totals=fenXi.getTotalscore(str); str = str +" 总分:"+totals; System.out.println(str); bfw.write(str); bfw.newLine(); } bfr.close(); bfw.close(); }catch(IOException e) { } } }import java.util.; import java.io.; public class fenXi { public static double getTotalscore(String s) { Scanner sc = new Scanner(s); sc.useDelimiter("[^0123456789.]+"); double tscore = 0; while (sc.hasNext()) { try { double score = sc.nextDouble(); tscore += score; } catch (InputMismatchException e) { String t = sc.next(); } } return tscore; } }

public static void main(String[] args) { // ... } } 3. 在 main 方法中，创建两个文件对象 input 和 output，分别指向输入文件和输出文件： java File input = new File("C:\\Users\\28592\\Desktop\...

帮我优化以下代码import java.io.*; import java.time.LocalDate; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; public class Demo5 { public static void main(String[] args) throws IOException { ArrayList<Student> arr = new ArrayList<>(); File f1 = new File("input.txt"); FileInputStream fin = new FileInputStream(f1); BufferedReader br = new BufferedReader(new InputStreamReader(fin)); String msg = br.readLine(); while (msg != null) { if (msg.equals("")) { msg = br.readLine(); continue; } String[] stu = msg.split(" "); String num = stu[0]; String na = stu[1]; String da = stu[2]; String gen = stu[3]; Student student = new Student(Integer.parseInt(num), na,LocalDate.parse(da), gen); arr.add(student); Collections.sort(arr,Comparator.comparing(Student::getDate)); msg = br.readLine(); } br.close(); fin.close(); FileWriter writer = new FileWriter("output.txt"); for (Student obj:arr ) { writer.write(String.valueOf(obj)); writer.write("\r\n"); } writer.close(); } static class Student { private Integer number; private String name; private LocalDate date; private String gender; public LocalDate getDate() { return date; } public Student(Integer number, String name, LocalDate date, String gender) { this.number = number; this.name = name; this.date = date; this.gender = gender; } @Override public String toString() { return number + " " + name + " " + date + " " + gender; } } }

public static void main(String[] args) { ArrayList<Student> arr = new ArrayList(); try (BufferedReader br = new BufferedReader(new FileReader("input.txt")); FileWriter writer = new FileWriter(...

修正以下代码：import java.io.*; import java.net.ServerSocket; import java.net.Socket; import java.util.HashMap; import java.util.Map; import java.util.Scanner; public class Sever { // 保存所有用户的用户名和密码 private static Map<String, String> userMap = new HashMap<>(); // 指定的目录 private static File rootDir = null; // 保存所有登录的用户信息 private static Map<String, String> loginInfo = new HashMap<>(); public static void main(String[] args) throws Exception { // 从配置文件中读取用户信息和目录信息 BufferedReader reader = new BufferedReader(new FileReader("config.txt")); String line = null; while ((line = reader.readLine()) != null) { if (line.startsWith("user:")) { String[] user = line.split(":"); userMap.put(user[1], user[2]); } if (line.startsWith("dir:")) { String[] dir = line.split(":"); rootDir = new File(dir[1]); } } reader.close(); // 启动服务器 ServerSocket serverSocket = new ServerSocket(8000); int count = 0; System.out.println("服务器启动成功！"); while (true) { // 监听客户端连接 Socket socket = serverSocket.accept(); count++; System.out.println("第" + count + "个客户端连接成功！"); // 处理客户端请求 new Thread(new ServerThread(socket)).start();

public static void main(String[] args) throws Exception { // 从配置文件中读取用户信息和目录信息 BufferedReader reader = new BufferedReader(new FileReader("config.txt")); String line = null; while...

编写简单的成绩管理系统，其中有成绩录入模块。成绩录入过程中，难免出现录入数据的类型出现错误，或录入的成绩不在合理的范围内。在成绩录入程序框架下，若出现上述错误，程序应该如何处理。程序框架如下，根据注释内容将代码补充完整。import java.io.*; import java.util.ArrayList; public class Exp1 { public static void main(String[] args) { ArrayList<Integer> scores = new ArrayList<Integer>(); inputScores(scores); outputScores(scores); } static void inputScores(ArrayList<Integer> scores) { System.out.println("Input q to quit."); BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); // fill here br.close(); } static void outputScores(ArrayList<Integer> scores) { for (int i = 0; i < scores.size(); i++) { System.out.println((i + 1) + ": " + scores.get(i)); } } }

public static void main(String[] args) { ArrayList<Integer> scores = new ArrayList(); inputScores(scores); outputScores(scores); } static void inputScores(ArrayList<Integer> scores) { System....

import java.io. ; import java.net.; import java.util. *; public class EchoServer{ public static void main(String[] args) throws IOException {new EchoServerThread().start();}} class EchoServerThread extends Thread{ protected DatagramSocket socket = null; protected BufferedReader in = null; protected boolean hasMoreWork = true; protected int number = 0;//访问计数变量 public EchoServerThread() throws IOException{ this("EchoServerThread"); } public EchoServerThread(String name) throws IOException{ super(name); socket = new DatagramSocket(4248); public void run(){ while (hasMoreWork) { try{ byte[] buf = new byte[256];//接收应答 DatagramPacket packet = new DatagramPacket(buf, buf.length); socket.receive(packet); //创建应答 String dString = null; number++; dString ="Hi!你是第"+ number + "个访问者!"; buf = dString.getBytes();//将应答发送给端口和地址为"address""port"的客户 InetAddress address = packet.getAddress(); int port = packet.getPort(); packet = new DatagramPacket(buf, buf.length, address, port); socket.send(packet); }catch (IOException e){ e.printStackTrace(); hasMoreWork = false; } } socket.close();} } }哪里出错了

public static void main(String[] args) throws IOException { new EchoServerThread().start(); } } class EchoServerThread extends Thread { protected DatagramSocket socket = null; protected ...

import java.io.; import java.awt.; import javax.swing.*; import java.util.List; import java.util.ArrayList; public class Recite extends JFrame{ JLabel lblWord = new JLabel("word"); JLabel lblMeaning = new JLabel("meaning"); public void init() { setSize( 400,100 ); setLayout(new FlowLayout()); getContentPane().add(lblWord); getContentPane().add(lblMeaning); setDefaultCloseOperation(EXIT_ON_CLOSE); setVisible(true); } List<String> words = new ArrayList<>(); List<String> meanings = new ArrayList<>(); int current = 0; public void start() { new Thread(()->{ try{ readAll(); }catch(IOException ex){} new javax.swing.Timer(1000,(e)->{ lblWord.setText( words.get(current) ); lblMeaning.setText( meanings.get(current) ); current++; }).start(); }).start(); } public void readAll( ) throws IOException{ String fileName = "College_Grade4.txt"; String charset = "GB2312"; BufferedReader reader = new BufferedReader( new InputStreamReader( new FileInputStream(fileName), charset)); String line; while ((line = reader.readLine()) != null) { line = line.trim(); if( line.length() == 0 ) continue; int idx = line.indexOf("\t"); words.add( line.substring(0, idx )); meanings.add( line.substring(idx+1)); } reader.close(); } public static void main( String[] args){ Recite f = new Recite(); f.init(); f.start(); }}界面可以再好看一点；可以去掉音标；可以改变单词显示的速度；可以增加标记生词并记到生词本中；可以增加测试的功能（单词含义可以随机选4个词的含义来让用户选择）等等。附件中有两个代码，一个单词本。

好的，我会将你提供的代码添加到生词本中，并增加一个测试功能，让用户选择... public static void main(String[] args) { Recite f = new Recite(); f.start(); } } 现在，你可以运行这个代码并开始背单词了！

根据提示，在右侧编辑器编写代码，使用PreparedStatement 接口完成查询已知数据表的记录，要求根据键盘输入的 ID 找到该记录。package step1; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.io.; public class JdbcTestFour{ public static final String DBDRIVER="com.mysql.jdbc.Driver"; public static final String DBURL="jdbc:mysql://localhost:3306/school"; public static final String DBUSER="root"; public static final String PASSWORD="123123"; public static void main(String[] args) throws Exception{ int id=0; String name=null; int age=0; String note=null; BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); String sql="SELECT id,name,age,note FROM member WHERE id=?"; Connection conn=null; //每一个Connection 对象表示一个数据库连接 PreparedStatement pstmt=null; //数据库操作对象 / begin / //加载驱动程序 //根据参数DBURL、DBUSER、PASSWORD 创建连接对象conn / end / pstmt=conn.prepareStatement(sql); //执行SQL 语句 System.out.println("请输入学号"); id=Integer.parseInt(br.readLine()); pstmt.setInt(1,id); / begin / ResultSet rs; //查询操作 / end / / begin / //显示查询数据 / end / pstmt.close(); //关闭操作，如果不关闭操作，关闭连接也是一样的 conn.close(); //关闭连接 } }package step1; import java.sql.; public class Insert { public void createDatabase() { try { // 加载数据库驱动程序 Class.forName("com.mysql.jdbc.Driver"); // 建立数据库连接 Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/", "root", "123123"); // 创建 Statement 对象 Statement stmt = conn.createStatement(); // 执行 SQL 语句创建数据库 String sql = "CREATE DATABASE school;"; stmt.executeUpdate(sql); // 关闭 Statement 对象和 Connection 对象 stmt.close(); conn.close(); } catch (Exception e) { e.printStackTrace(); } } }

public static void main(String[] args) throws Exception{ int id=0; String name=null; int age=0; String note=null; Scanner sc = new Scanner(System.in); String sql="SELECT id,name,age,note FROM ...

java OCR.json

public static void main(String[] args) { String filePath = "OCR.json"; String jsonStr = readJsonFile(filePath); JSONObject jsonObj = JSON.parseObject(jsonStr); String name = jsonObj.getString(...

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