The throw keyword
public class Clock {
private int hours; // 1-12
private int minutes; // 0-59
private int seconds; // 0-59
public Clock(int hours, int minutes, int seconds) {
if (hours < 1 || hours > 12) {
throw new IllegalArgumentException("Hours must be between 1 and 12");
}
if (minutes < 0 || minutes > 59) {
throw new IllegalArgumentException("Minutes must be between 0 and 59");
}
if (seconds < 0 || seconds > 59) {
throw new IllegalArgumentException("Seconds must be between 0 and 59");
}
this.hours = hours;
this.minutes = minutes;
this.seconds = seconds;
}
public Clock(int hours, minutes) {
this(hours, minutes, 0);
}
public Clock(int hours) {
this(hours, 0, 0);
}
}