Question

FiveOnly.java: Write a program that asks the user for the name of a file. The program should display only the first five lines of the file’s contents. If the file contains fewer than five lines, it should display the file’s entire contents. See Challenge 13 on p265.

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Answer 1

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.Scanner;

public class FiveOnly {
   public static void main(String[] args) throws Exception {
       Scanner sc = new Scanner(System.in);
       System.out.print("Enter file name: ");
       String fileName=sc.next();
       //opening the user given file
       BufferedReader br = new BufferedReader(new FileReader(fileName));
       int lineCount=0;
       //reading line
       String line=br.readLine();
       // loop untill we reach end of file
       while(line!=null) {
           //if we print 5 lines than exit
           if(lineCount==5)
               break;
           System.out.println(line);
           lineCount++;
           line=br.readLine();
       }
   }
}

Enter file name: input.txt Hello I am Java Programmer Good morning Enter an input Java technology Good java coding technology

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