j14 - Posts - OneCompiler

/*
Write a Java program using Multithreading for a simple search engine. Accept a string
to be searched. Search the string in all text files in the current folder. Use a separate
thread for each file. The result should display the filename and line number where the
string is found.
*/
package com.mycompany.javaslip;

import java.io.*;
import java.util.Scanner;

class SearchThread extends Thread {
private File file;
private String searchStr;

SearchThread(File file, String searchStr) {
    this.file = file;
    this.searchStr = searchStr;
}

public void run() {
    searchInFile(file, searchStr);
}

public void searchInFile(File file, String searchStr) {
    boolean found = false;
    try (BufferedReader br = new BufferedReader(new FileReader(file))) {
        String line;
        int lineNo = 0;
        while ((line = br.readLine()) != null) {
            lineNo++;
            if (line.contains(searchStr)) {
                System.out.println("Found '" + searchStr + "' in " + file.getName() + " at line " + lineNo);
                found = true;
            }
        }
    } catch (IOException ex) {
        System.err.println("Error reading file: " + file.getName());
    }
    if (!found) {
        System.out.println(searchStr + " not found in " + file.getName());
    }
}

}

public class slip14_1
{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter string to be searched in files:");
String searchStr = sc.nextLine();

    File currDir = new File(".");
    File[] files = currDir.listFiles();

    if (files != null) {
        boolean foundInAnyFile = false;
        for (File file : files) {
            if (file.isFile() && file.getName().endsWith(".txt")) {
                SearchThread t = new SearchThread(file, searchStr);
                t.start();
                foundInAnyFile = true;
            }
        }
        if (!foundInAnyFile) {
            System.out.println("No text files found in the current directory.");
        }
    } else {
        System.err.println("Error: Unable to access current directory.");
    }
}

}

<%@page contentType="text/html" pageEncoding="UTF-8"%>

<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>JSP Page</title> <style> .res { color: red; font-size: 18px; } </style> </head> <body> <h1>Calculate sum of fist and last digit?</h1> <form action="slip14_2.jsp" method="post"> Enter a number: <input type="text" name="num"> <input type="submit" value="sum?"> </form> <% String numStr = request.getParameter("num"); int n = 0;

        if(numStr != null && !numStr.isEmpty()) {
            n = Integer.parseInt(numStr);
            
            int fDigit = n;
            while(fDigit >= 10) {
                fDigit /= 10;
            }
            int lDigit = n % 10;
            
            int sum = fDigit + lDigit;
    %>
            <h3 class="res">Sum of first and last digit is <%= sum %></h3>
    <%        
        }
    %>
</body>

</html>