public class Date {
	private int hours; // 0-23
	private int minutes; // 0-59
	private int seconds; // 0-59

// constructors are overloaded below

public Date() {setHours(0); setMinutes(0); setSeconds(0);}
 // since other constructors are defined, zero-argument constructor no longer available
 // by default and hence must be defined if it is to be invoked

public Date(int hours) { setHours(hours); // parameter hours is repassed to setHours method
setMinutes(0);
setSeconds(0);}// constructor has same name as class and doesn't have a return type

// because signature of constructor below is identical to one above, it is illegal
// in some cases, the parameters will naturally be of different types so one can distinguish
// one method from another
// public Date(int minutes) { setMinutes(minutes); // parameter hours is repassed to setHours method
// setHours(0);
// setMinutes(minutes);
//setSeconds(0);}// constructor has same name as class and doesn't have a return type

public Date(int hours, int minutes) { setHours(hours);setMinutes(minutes);setSeconds(0);}

public Date(int hours, int minutes, int seconds) { setHours(hours);setMinutes(minutes);
setSeconds(seconds);}


public void setHours (int hours) {
	if (hours<0 || hours>23) this.hours = 0; // this keyword used to refer to calling object
	else this.hours = hours;} // this keyword required when instance variable and parameter
	// (or any local variable) have the same name

public void setMinutes (int sminutes) {
	minutes = (sminutes<0 || sminutes>59)?0:sminutes; // equivalent to if test above
	}

public void setSeconds (int sseconds) {
	seconds = (sseconds<0 || sseconds>59)?0:sseconds;
	}

public int getHours() {return hours;}

public int getMinutes() {return minutes;}

public int getSeconds() {return seconds;}

public String toString() { // no parameters since all necessary info in object
    return hours + ":" + minutes + ":" + seconds; // default toString method doesn't
 // return anything familiar so we want to output in hours:minutes:seconds format
						}
}