PBO_8.4

/*
Program 8.4 (ThisTest)
@author (srachmadbudi)
@version (1.0)
 */

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

class SimpleTime{
    private int hour;
    private int minute;
    private int second;

    public SimpleTime(int hour, int minute, int second){
        this.hour = hour;
        this.minute = minute;
        this.second = second;
    }

    public String buildString(){
        return String.format("%24s: %s\n%24s: %s",
                "this.toUniversalString()", this.toUniversalString(),
                "toUniversalString()",toUniversalString()
             );
    }

    public String toUniversalString(){
        return String.format("%02d:%02d:%02d",
        this.hour, this.minute, this.second);
    }
}