Class Timer

java.lang.Object
  Timer

Direct Known Subclasses:

NamedTimer

public class Timer
extends java.lang.Object

A countdown timer with minutes and seconds. The timer does not go less than zero.

Constructor Summary

Timer()
construct a timer with no initial value; timer set to zero

Timer(int minutes)
construct a timer with a positive number of minutes

Timer(int minutes, int seconds)
construct a timer with minutes and seconds of timer (combined value should be positive)

Method Summary

boolean	outOfTime() returns whether timer has run out of time
void	set() sets timer to zero
void	set(int minutes) sets minutes of timer (value should be positive)
void	set(int minutes, int seconds) sets minutes and seconds of timer (combined value should be positive)
void	subtract(int minutes, int seconds) subtracts minutes and seconds from timer; timer should not fall below zero
java.lang.String	toString() builds a string of the timer's value in minutes:seconds form

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Timer

public Timer(int minutes,
             int seconds)

construct a timer with minutes and seconds of timer (combined value should be positive)

Parameters:

minutes - number of minutes on newly constructed timer

seconds - number of seconds on newly constructed timer

Timer

public Timer(int minutes)

construct a timer with a positive number of minutes

Parameters:

minutes - number of minutes on newly constructed timer

Timer

public Timer()

construct a timer with no initial value; timer set to zero

Method Detail

set

public void set(int minutes,
                int seconds)

sets minutes and seconds of timer (combined value should be positive)

Parameters:

minutes - number of minutes

seconds - number of seconds

set

public void set(int minutes)

sets minutes of timer (value should be positive)

Parameters:

minutes - number of minutes

set

public void set()

sets timer to zero

toString

public java.lang.String toString()

builds a string of the timer's value in minutes:seconds form

Overrides:

toString in class java.lang.Object

Returns:

a string of the timer's value in minutes:seconds form

subtract

public void subtract(int minutes,
                     int seconds)

subtracts minutes and seconds from timer; timer should not fall below zero

Parameters:

minutes - number of minutes to subtract

seconds - number of seconds to subtract

outOfTime

public boolean outOfTime()

returns whether timer has run out of time

Returns:

whether timer has run out of time