/**

 * Illustrates the difference between an argument and a

 * parameter.

 *

 * @author tkrogers

 * @version 9-27-11

 */

public class ArgumentParameterDemo {

    public static void main ( ) {

        int x;

        int number = 4;

        // here the someMethod is being called or

        // in other words run. the 2 is an argument.

        // It is the data value passed into someMethod

        // for processing.

        x = someMethod ( 2 );

        System.out.println ( "someMethod returns " + x);

        // Now number is used as an argument. Its

        // value of 4 is now passed into someMethod

        // for processing

        someMethod ( number );

        System.out.println ( "someMethod returns " + x);

        // Note: arguments NEVER have a data type. They are

        // only found when a method is called.

    }

   

    // The line of code below this comment is a

    // specification for someMethod. " int i" is a

    // parameter.Parameters specify the type of data

    // that will be passed into the method for processing.

    public static int someMethod ( int i) {

        return 2 * i;

    }

    // Note: Parameters always show a data type and

    // are only found in the first line of a method's code.

}