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Question

I have gone through the tutorial and am a bit confused on how to comment my program. I can comment my main method but am not sure what to do to comment the other mehods and my variables. Can anyone help me?
import java.util.StringTokenizer;
import java.util.regex.Matcher;
  * <p>
  * StringQuiz executes the 6 methods assigned in the document using methods
  * that are related to strings.
  * </p>
  * @author Daniel Wood
  * Date 2006.02.17
  * @version 1.0.0.x
  public class StringQuiz
       * @param args String array of command line parameters passed to main
     public static void main(String args[])
            * @return method_1 uses a regular expression to determine if the 5 address return the boolean
            * value of true or false.
          method_1();
          method_2();
          method_3();
          method_4();
          method_5();
          method_6();
     }//end main
     static void method_1()
     System.out.println("Method 1");
     String address1 = "112 Elm Street";
     String address2 = "112 South Elm St.";
     String address3 = "112 S. Elm";
     String address4 = "Elm St.";
     String address5 = "South 112 Elm";
     //"[\\d]+[\\s]+[a-zA-Z]+[ .]+[a-zA-z]+[ .]*[a-zA-z]*[ .\\n]?"
     String matchString = "\\d+ [A-Z,a-z,. ]+";
     System.out.println(address1.matches(matchString));
     System.out.println(address2.matches(matchString));
     System.out.println(address3.matches(matchString));
     System.out.println(address4.matches(matchString));
     System.out.println(address5.matches(matchString));     
     }//end method 1
     static void method_2()
        System.out.println("Method 2");
        String csv = ("23,  14, 19,21,    3");
        StringTokenizer tokens = new StringTokenizer(csv, ", ");
           while (tokens.hasMoreTokens() ){
           System.out.println (tokens.nextToken());
           }// end while
     }//end method_2
     static void method_3()
     System.out.println("Method 3"); 
     String hello = "Hello, How are you";
     hello = hello.replaceAll("H", "h");
     hello = hello.replaceAll(",", ".");
     System.out.println(hello);
     }// end method_3
    static void method_4()
   System.out.println("Method 4");
   String whale = "Willy the whale.";
   StringBuffer buffer = new StringBuffer();
   buffer.append(whale);
   buffer.insert (4, "fff");
   System.out.println (buffer.toString());
   }// end method_4
  static void method_5()
   System.out.println("Method 5"); 
   String num = "3.456";
   float number2 = Float.valueOf(num).floatValue();
   System.out.println(number2);
   System.out.println(number2 + 10);
  }// end method_5
   static void method_6()
   System.out.println("Method 6");
   String record = "This is record: 7Pq8";      
        System.out.println(record.substring(16, 20));
  }// end method_6
}// end  public class StringQuiz

Answer 1

Here is a simple example of how a method is documented. (This is a stupid method, but hopefully you get the idea.)
* Prints a String.  The length of the String is returned.
* @param  toPrint  the String to be printed
* @return   the length of the String
* @throws  NullPointerException if the String is null
public int printAString(String toPrint) {
   if (toPrint == null)
      throw new NullPointerException("Null string");
   System.out.println(toPrint);
   return toPrint.length();