public class ReadingExample {
} // end class ReadingExample

// File: ReadingExample.java
// Date: Mar 26, 2017
// Author: Nicholas Duchon
// Purpose: Show a development sequence
//          leading to reading a text file line by line

public class ReadingExample {
} // end class ReadingExample

// File: ReadingExample.java
// Date: Mar 26, 2017
// Author: Nicholas Duchon
// Purpose: Show a development sequence
//          leading to reading a text file line by line

public class ReadingExample {
  public static void main (String args []) {
  } // end main method
} // end class ReadingExample

// File: ReadingExample.java
// Date: Mar 26, 2017
// Author: Nicholas Duchon
// Purpose: Show a development sequence
//          leading to reading a text file line by line

import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;

public class ReadingExample {
  public static void main (String args []) {
    System.out.println ("--- Bye ---");
  } // end main method
} // end class ReadingExample

// File: ReadingExample.java
// Date: Mar 26, 2017
// Author: Nicholas Duchon
// Purpose: Show a development sequence
//          leading to reading a text file line by line

import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException

public class ReadingExample {
  public static void main (String args []) {
    System.out.println ("--- Bye ---");
  } // end main method
} // end class ReadingExample

// File: ReadingExample.java
// Date: Mar 26, 2017
// Author: Nicholas Duchon
// Purpose: Show a development sequence
//          leading to reading a text file line by line

import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;

public class ReadingExample {
  public static void main (String args []) {
    try {
      Scanner sf = new Scanner (new File ("ReadingExample.java"));
    } catch (FileNotFoundException e) {
    } // end try/catch block   
    System.out.println ("--- Bye ---");
  } // end main method
} // end class ReadingExample

// File: ReadingExample.java
// Date: Mar 26, 2017
// Author: Nicholas Duchon
// Purpose: Show a development sequence
//          leading to reading a text file line by line

import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;

public class ReadingExample {
  public static void main (String args []) {
    try {
      Scanner sf = new Scanner (new File ("ReadingExample.java"));
      while (sf.hasNextLine()) {
      } // end for each line in the file
    } catch (FileNotFoundException e) {
    } // end try/catch block   
    System.out.println ("--- Bye ---");
  } // end main method
} // end class ReadingExample

// File: ReadingExample.java
// Date: Mar 26, 2017
// Author: Nicholas Duchon
// Purpose: Show a development sequence
//          leading to reading a text file line by line

import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;

public class ReadingExample {
  public static void main (String args []) {
    try {
      Scanner sf = new Scanner (new File ("ReadingExample.java"));
      while (sf.hasNextLine()) {
        String line = sf.nextLine ();
        System.out.printf ("Read >%s<\n", line);
      } // end for each line in the file
    } catch (FileNotFoundException e) {
    } // end try/catch block   
    System.out.println ("--- Bye ---");
  } // end main method
} // end class ReadingExample

Read >// File: ReadingExample.java<
Read >// Date: Mar 26, 2017<
Read >// Author: Nicholas Duchon<
Read >// Purpose: Show a development sequence <
Read >//          leading to reading a text file line by line<
Read ><
Read >import java.util.Scanner;<
Read >import java.io.File;<
Read >import java.io.FileNotFoundException;<
Read ><
Read >public class ReadingExample {<
Read >  public static void main (String args []) {<
Read >    try {<
Read >      Scanner sf = new Scanner (new File ("ReadingExample.java"));<
Read >      while (sf.hasNextLine()) {<
Read >        String line = sf.nextLine ();<
Read >        System.out.printf ("Read >%s<\n", line);<
Read >      } // end for each line in the file<
Read >    } catch (FileNotFoundException e) {<
Read >    } // end try/catch block    <
Read >    System.out.println ("--- Bye ---");<
Read >  } // end main method<
Read >} // end class ReadingExample<

• One approach is to create a new Scanner on the line (String) just read from the file:
• Scanner tokens = new Scanner (line);
• Normal mode is splitting line using white space (spaces, tabs, returns)
  
• You can use regular expressions to split the line using other patterns than white space
• You can check to be sure tokenizing is working as expected using a print statement similar to the one used in step 7
  
• Use Scanner methods matched to the data type being read:
• hasNext () and next () for String types
• hasNextInt () and nextInt for integer types
• hasNextDouble () and nextDouble () for double types
• hasNextBoolean () and nextBoolean () for the boolean types true and false
• hasNextChar () and nextChar () for just one char