Question

Java Programming Create a class named Problem1, and create a main method, the program does the following:

- Prompt the user to enter a String named str. - Prompt the user to enter a character named ch.

- The program finds the index of the first occurrence of the character ch in str and print it in the format shown below.

- If the character ch is found in more than one index in the String str, the program prints the first index only.

- You may not use any built-in String methods to complete the task. You can only use the chartAt()and length() methods from the String class.

- Copy the output to a text file named Problem1.txt example output:

https://media.cheggcdn.com/media/c1a/c1a52903-6edb-4c01-a19d-dbb94d7a6308/phpvOMJmm.png

Answer 1

// Required program

import java.util.Scanner;
import java.io.File;
import java.io.IOException;
import java.io.PrintStream;

public class Problem1
{
   public static void main(String[] args) throws IOException {
   Scanner scanner = new Scanner(System.in);
  
   //Instantiating the File class
File file = new File("Problem1.txt");
//Instantiating the PrintStream class
PrintStream stream = new PrintStream(file);
  
   System.out.print("Enter a text: ");
   String inputString = scanner.nextLine();
  
   System.out.print("Enter a character to look for: ");
   char ch = scanner.next().charAt(0);
  
   boolean flag = false;
  
   String outputString = "";
  
   for(int i = 0; i < inputString.length(); i ++) {
   if(inputString.charAt(i) == ch){
   outputString = ch + " was found at index " + i;
   flag = true;
   break;
   }
   }
  
   if(flag == false) {
   outputString = ch + " was not found in the String " + inputString;
   }
  

  System.out.println(outputString);

System.out.println("Output copied to the text file " + file.getAbsolutePath());
  
System.setOut(stream);
  
System.out.println("Enter a text: " + inputString);
System.out.println("Enter a character to look for: " + ch);
System.out.println(outputString);

   }
}

// Outputs:

CONSOLE OUPUT

PROBLEM1.TXT FILE OUTPUT

CONSOLE OUTPUT

PROBLEM1.TXT FILE OUTPUT