Problem - How you can read a text file from a directory ?

Contents

1. 1 Program :
   1. 1.1 Step 1 - Coding
   2. 1.2 Step 2 - Deployment
   3. 1.3 Step 3 - Testing
   4. 1.4 Output

Solution : java.util.Scanner which can parse primitive types and strings using regular expressions.

Program :

Step 1 - Coding

Create a text file c:/sunilos/ReadFileScanner.java  and copy below contents.

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

/**
 * A program to read a file with help of Scanner class.
 */ 

public class ReadFileScanner {

    public static void main(String[] args) throws Exception{

        FileReader reader = new FileReader("c:/sunilos/sunilos.txt");
        //Scanner sc = new Scanner("c:/sunilos/sunilos.txt");
        Scanner sc = new Scanner(reader);
        while(sc.hasNext()){
            System.out.println(sc.nextLine());
        }
       
    }

}

Step 2 - Deployment

1. Create a folder 'c:\sunilos'. 
2. Create or copy ReadFileScanner.java  into 'c:\sunilos' folder.
3. Download sunilos.txt file into 'c:\sunilos' folder.
4. Open your command prompt and go to  'c:\sunilos'
   
5. Compile ReadFileScanner.java with help of 
1. javac ReadFileScanner.java command.Command will create ReadFileScanner.class file in the same folder.
   
6. Congratulations!! your Java program is ready to serve.

Step 3 - Testing

1. Make sure you are on Command Prompt under c:\sunilos directory
   
2. Now start your java program from command prompt with help of 
• java ReadFileScanner command.

Output

A software services and corporate training company specializing in Distributed
Object Oriented and Client Server Technologies with a strong background of J2EE.


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