If I have multiple text files I want information from, how do I go about retriev

Question

If I have multiple text files I want information from, how do I go about retrieving the information based on user choice? For instance, if I ask user to enter a number (1, 2, 3, etc.) and the number they decide will go with one of the text files. Do I store their choice in a variable and use if-else if? I want a scanner to scan through the file, not print it to console, and retreive parts of the text file where I have <text> in carrot brackets for the user to fill in. How do i only print that to the user and not the whole text?

Explanation / Answer

/*Opens a file , whereever <text> is there , takes user input and fills that data
in the file. Creates an updated file */

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

public class Demo197{
    public static void main(String[] args){
       try {
             Scanner sc = new Scanner(System.in);
             while(true){
                System.out.println("1.open a file");
                System.out.println("2.Quit");
                System.out.println("Enter choice:");
                int n = Integer.parseInt(sc.nextLine());
                if (n == 2)
                   break;
                if (n == 1){
                    System.out.println("Enter filename:");
                    String nm = sc.nextLine();
                    FileInputStream fin = new FileInputStream(nm);
                    FileOutputStream fout = new FileOutputStream(nm+"_out.txt");
                    PrintWriter pw = new PrintWriter(fout);
                    Scanner fc = new Scanner(fin);
                    while (fc.hasNextLine()){
                        String line = fc.nextLine();
                        if (line.contains("<text>")){
                           System.out.println("Enter data:");
                           String line1 = sc.nextLine();
                           pw.println(line1);
                        }
                        else {
                           pw.println(line);
                        }
                    }
                    pw.close();
                    fout.close();
                    fin.close();
                }
              }
       }
       catch(Exception e){
           e.printStackTrace();
       }
    }
}

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