//Fig. 8.4 : ThisTest.java
//digunakan secara implisit dan eksplisit untuk merujuk ke object's members

public class ThisTest
{
    public static void main(String[] args)
    {
        SimpleTime time = new SimpleTime(15, 30, 19);
        System.out.println(time.buildString() );
    } //akhir main
}//akhir class ThisTest

//class SimpleTime mendemonstrasikan the "this" reference
class SimpleTime
{
    private int jam;   //0-23
    private int menit; //0-59
    private int detik; //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 jam, int menit, int detik)
    {
        this.jam = jam; // set "this" object's jam
        this.menit = menit; // set "this" object's menit
        this.detik = detik; // set "this" object's detik
    }//akhir SimpleTime constructor

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

    //mengubah ke String pada format waktu Universal (JJ:MM:DD)
    public String toUniversalString()
    {
        // "this" is not required here to access instance variables,
        // because method does not have local variables with same
        // names as instance variables
        return String.format("%02d : %02d : %02d",
            this.jam, this.menit, this.detik);
    } // akhiir method toUniversalString
}//akhir program