/**
 * ThisTest.Java.
 * this used implicitly and explicitly to refer to members of an object.
 * @Ghifari Astaudi Ukumullah
 * @version (a version number or a date)
 */
public class ThisTest
{
    public static void main ( String[] args)
    {
        SimpleTime time = new SimpleTime ( 15, 30,19);
        System.out.println ( time.buildString());
    } //end main
} //end class ThisTest

//class Simple Time demonstates the "this" reference
class SimpleTime
{
    private int hour; // 0 - 23
    private int minute; // 0 - 59
    private int second; // 0 - 59

    // if the constructor uses parameter names identical to
    // instance variable names the "this" reference is
    // required to distinguish between the names
    public SimpleTime (int hour, int minute, int second)
    {
        this.hour = hour; // set "this" object's hour
        this.minute = minute; // set "this" object's minute
        this.second = second; // set "this" object's second
    } // end SimpleTime constructor

    // use explicit and implisit "this" to call toUniversalString
    public String buildString ()
    {
        return String.format ( "%24s: %s\n%24s: %s",
             "this.toUniversalString()", this.toUniversalString(),
             "toUniversalString()", toUniversalString());
    } // end method buildString

    // convert to String in universal-time format (HH:MM:SS);
    public String toUniversalString()
    {
        // "this" is not required here to access instance variable
        // because method does not have local variables with same
        // names as instance variables
        return String.format ( "%02d:%02d:%02d",
            this.hour, this.minute, this.second );
    } // end method toUniversalString
}