Code:
/**
* A {@code TimeUnit} represents time durations at a given unit of
* granularity and provides utility methods to convert across units,
* and to perform timing and delay operations in these units. A
* {@code TimeUnit} does not maintain time information, but only
* helps organize and use time representations that may be maintained
* separately across various contexts. A nanosecond is defined as one
* thousandth of a microsecond, a microsecond as one thousandth of a
* millisecond, a millisecond as one thousandth of a second, a minute
* as sixty seconds, an hour as sixty minutes, and a day as twenty four
* hours.
* <p>
* <p>A {@code TimeUnit} is mainly used to inform time-based methods
* how a given timing parameter should be interpreted. For example,
* the following code will timeout in 50 milliseconds if the {@link
* java.util.concurrent.locks.Lock lock} is not available:
* <p>
* <pre> {@code
* Lock lock = ...;
* if (lock.tryLock(50L, TimeUnit.MILLISECONDS)) ...}</pre>
* <p>
* while this code will timeout in 50 seconds:
* <pre> {@code
* Lock lock = ...;
* if (lock.tryLock(50L, TimeUnit.SECONDS)) ...}</pre>
* <p>
* Note however, that there is no guarantee that a particular timeout
* implementation will be able to notice the passage of time at the
* same granularity as the given {@code TimeUnit}.
*
* @author Doug Lea
* @since 1.5
*/
public enum TickTime {
/**
* Time unit representing one thousandth of a microsecond
*/
NANOSECONDS {
public long toNanos(long d) {
return d;
}
public long toMicros(long d) {
return d / (C1 / C0);
}
public long toMillis(long d) {
return d / (C2 / C0);
}
public long toGameTicks(long d) {
return (long) (d / (C3 / C0) / 0.6);
}
public long toSeconds(long d) {
return d / (C3 / C0);
}
public long toMinutes(long d) {
return d / (C4 / C0);
}
public long toHours(long d) {
return d / (C5 / C0);
}
public long toDays(long d) {
return d / (C6 / C0);
}
public long convert(long d, TickTime u) {
return u.toNanos(d);
}
int excessNanos(long d, long m) {
return (int) (d - (m * C2));
}
},
/**
* Time unit representing one thousandth of a millisecond
*/
MICROSECONDS {
public long toNanos(long d) {
return x(d, C1 / C0, MAX / (C1 / C0));
}
public long toMicros(long d) {
return d;
}
public long toMillis(long d) {
return d / (C2 / C1);
}
public long toGameTicks(long d) {
return (long) (d / (C3 / C1) / 0.6);
}
public long toSeconds(long d) {
return d / (C3 / C1);
}
public long toMinutes(long d) {
return d / (C4 / C1);
}
public long toHours(long d) {
return d / (C5 / C1);
}
public long toDays(long d) {
return d / (C6 / C1);
}
public long convert(long d, TickTime u) {
return u.toMicros(d);
}
int excessNanos(long d, long m) {
return (int) ((d * C1) - (m * C2));
}
},
/**
* Time unit representing one thousandth of a second
*/
MILLISECONDS {
public long toNanos(long d) {
return x(d, C2 / C0, MAX / (C2 / C0));
}
public long toMicros(long d) {
return x(d, C2 / C1, MAX / (C2 / C1));
}
public long toMillis(long d) {
return d;
}
public long toGameTicks(long d) {
return (long) (d / (C3 / C2) / 0.6);
}
public long toSeconds(long d) {
return d / (C3 / C2);
}
public long toMinutes(long d) {
return d / (C4 / C2);
}
public long toHours(long d) {
return d / (C5 / C2);
}
public long toDays(long d) {
return d / (C6 / C2);
}
public long convert(long d, TickTime u) {
return u.toMillis(d);
}
int excessNanos(long d, long m) {
return 0;
}
},
GAMETICKS {
public long toNanos(long d) {
return d * 600000000;
}
public long toMicros(long d) {
return d * 600000;
}
public long toMillis(long d) {
return d * 600;
}
public long toGameTicks(long d) {
return d;
}
public long toSeconds(long d) {
return (long) (d / 0.6);
}
public long toMinutes(long d) {
return (long) (d / 60 / 0.6);
}
public long toHours(long d) {
return (long) (d / 60 / 60 / 0.6);
}
public long toDays(long d) {
return (long) (d / 24 / 60 / 60 / 0.6);
}
public long convert(long d, TickTime u) {
return u.toGameTicks(d);
}
int excessNanos(long d, long m) {
return 0;
}
},
/**
* Time unit representing one second
*/
SECONDS {
public long toNanos(long d) {
return x(d, C3 / C0, MAX / (C3 / C0));
}
public long toMicros(long d) {
return x(d, C3 / C1, MAX / (C3 / C1));
}
public long toMillis(long d) {
return x(d, C3 / C2, MAX / (C3 / C2));
}
public long toGameTicks(long d) {
return (long) (d / 0.6);
}
public long toSeconds(long d) {
return d;
}
public long toMinutes(long d) {
return d / (C4 / C3);
}
public long toHours(long d) {
return d / (C5 / C3);
}
public long toDays(long d) {
return d / (C6 / C3);
}
public long convert(long d, TickTime u) {
return u.toSeconds(d);
}
int excessNanos(long d, long m) {
return 0;
}
},
/**
* Time unit representing sixty seconds
*/
MINUTES {
public long toNanos(long d) {
return x(d, C4 / C0, MAX / (C4 / C0));
}
public long toMicros(long d) {
return x(d, C4 / C1, MAX / (C4 / C1));
}
public long toMillis(long d) {
return x(d, C4 / C2, MAX / (C4 / C2));
}
public long toGameTicks(long d) {
return (long) (x(d, C4 / C3, ((MAX / (C4 / C3)))) / 0.6);
}
public long toSeconds(long d) {
return x(d, C4 / C3, MAX / (C4 / C3));
}
public long toMinutes(long d) {
return d;
}
public long toHours(long d) {
return d / (C5 / C4);
}
public long toDays(long d) {
return d / (C6 / C4);
}
public long convert(long d, TickTime u) {
return u.toMinutes(d);
}
int excessNanos(long d, long m) {
return 0;
}
},
/**
* Time unit representing sixty minutes
*/
HOURS {
public long toNanos(long d) {
return x(d, C5 / C0, MAX / (C5 / C0));
}
public long toMicros(long d) {
return x(d, C5 / C1, MAX / (C5 / C1));
}
public long toMillis(long d) {
return x(d, C5 / C2, MAX / (C5 / C2));
}
public long toGameTicks(long d) {
return (long) (x(d, C5 / C3, MAX / (C5 / C3)) / 0.6);
}
public long toSeconds(long d) {
return x(d, C5 / C3, MAX / (C5 / C3));
}
public long toMinutes(long d) {
return x(d, C5 / C4, MAX / (C5 / C4));
}
public long toHours(long d) {
return d;
}
public long toDays(long d) {
return d / (C6 / C5);
}
public long convert(long d, TickTime u) {
return u.toHours(d);
}
int excessNanos(long d, long m) {
return 0;
}
},
/**
* Time unit representing twenty four hours
*/
DAYS {
public long toNanos(long d) {
return x(d, C6 / C0, MAX / (C6 / C0));
}
public long toMicros(long d) {
return x(d, C6 / C1, MAX / (C6 / C1));
}
public long toMillis(long d) {
return x(d, C6 / C2, MAX / (C6 / C2));
}
public long toGameTicks(long d) {
return (long) (x(d, C6 / C3, MAX / (C6 / C3)) / 0.6);
}
public long toSeconds(long d) {
return x(d, C6 / C3, MAX / (C6 / C3));
}
public long toMinutes(long d) {
return x(d, C6 / C4, MAX / (C6 / C4));
}
public long toHours(long d) {
return x(d, C6 / C5, MAX / (C6 / C5));
}
public long toDays(long d) {
return d;
}
public long convert(long d, TickTime u) {
return u.toDays(d);
}
int excessNanos(long d, long m) {
return 0;
}
};
// Handy constants for conversion methods
static final long C0 = 1L;
static final long C1 = C0 * 1000L;
static final long C2 = C1 * 1000L;
static final long C3 = C2 * 1000L;
static final long C4 = C3 * 60L;
static final long C5 = C4 * 60L;
static final long C6 = C5 * 24L;
static final long MAX = Long.MAX_VALUE;
/**
* Scale d by m, checking for overflow.
* This has a short name to make above code more readable.
*/
static long x(long d, long m, long over) {
if (d > over)
return Long.MAX_VALUE;
if (d < -over)
return Long.MIN_VALUE;
return d * m;
}
// To maintain full signature compatibility with 1.5, and to improve the
// clarity of the generated javadoc (see 6287639: Abstract methods in
// enum classes should not be listed as abstract), method convert
// etc. are not declared abstract but otherwise act as abstract methods.
/**
* Converts the given time duration in the given unit to this unit.
* Conversions from finer to coarser granularities truncate, so
* lose precision. For example, converting {@code 999} milliseconds
* to seconds results in {@code 0}. Conversions from coarser to
* finer granularities with arguments that would numerically
* overflow saturate to {@code Long.MIN_VALUE} if negative or
* {@code Long.MAX_VALUE} if positive.
* <p>
* <p>For example, to convert 10 minutes to milliseconds, use:
* {@code TimeUnit.MILLISECONDS.convert(10L, TimeUnit.MINUTES)}
*
* @param sourceDuration the time duration in the given {@code sourceUnit}
* @param sourceUnit the unit of the {@code sourceDuration} argument
* @return the converted duration in this unit,
* or {@code Long.MIN_VALUE} if conversion would negatively
* overflow, or {@code Long.MAX_VALUE} if it would positively overflow.
*/
public long convert(long sourceDuration, TickTime sourceUnit) {
throw new AbstractMethodError();
}
/**
* Equivalent to
* {@link #convert(long, TickTime) NANOSECONDS.convert(duration, this)}.
*
* @param duration the duration
* @return the converted duration,
* or {@code Long.MIN_VALUE} if conversion would negatively
* overflow, or {@code Long.MAX_VALUE} if it would positively overflow.
*/
public long toNanos(long duration) {
throw new AbstractMethodError();
}
/**
* Equivalent to
* {@link #convert(long, TickTime) MICROSECONDS.convert(duration, this)}.
*
* @param duration the duration
* @return the converted duration,
* or {@code Long.MIN_VALUE} if conversion would negatively
* overflow, or {@code Long.MAX_VALUE} if it would positively overflow.
*/
public long toMicros(long duration) {
throw new AbstractMethodError();
}
/**
* Equivalent to
* {@link #convert(long, TickTime) MILLISECONDS.convert(duration, this)}.
*
* @param duration the duration
* @return the converted duration,
* or {@code Long.MIN_VALUE} if conversion would negatively
* overflow, or {@code Long.MAX_VALUE} if it would positively overflow.
*/
public long toMillis(long duration) {
throw new AbstractMethodError();
}
public long toGameTicks(long duration) {
throw new AbstractMethodError();
}
/**
* Equivalent to
* {@link #convert(long, TickTime) SECONDS.convert(duration, this)}.
*
* @param duration the duration
* @return the converted duration,
* or {@code Long.MIN_VALUE} if conversion would negatively
* overflow, or {@code Long.MAX_VALUE} if it would positively overflow.
*/
public long toSeconds(long duration) {
throw new AbstractMethodError();
}
/**
* Equivalent to
* {@link #convert(long, TickTime) MINUTES.convert(duration, this)}.
*
* @param duration the duration
* @return the converted duration,
* or {@code Long.MIN_VALUE} if conversion would negatively
* overflow, or {@code Long.MAX_VALUE} if it would positively overflow.
* @since 1.6
*/
public long toMinutes(long duration) {
throw new AbstractMethodError();
}
/**
* Equivalent to
* {@link #convert(long, TickTime) HOURS.convert(duration, this)}.
*
* @param duration the duration
* @return the converted duration,
* or {@code Long.MIN_VALUE} if conversion would negatively
* overflow, or {@code Long.MAX_VALUE} if it would positively overflow.
* @since 1.6
*/
public long toHours(long duration) {
throw new AbstractMethodError();
}
/**
* Equivalent to
* {@link #convert(long, TickTime) DAYS.convert(duration, this)}.
*
* @param duration the duration
* @return the converted duration
* @since 1.6
*/
public long toDays(long duration) {
throw new AbstractMethodError();
}
/**
* Utility to compute the excess-nanosecond argument to wait,
* sleep, join.
*
* @param d the duration
* @param m the number of milliseconds
* @return the number of nanoseconds
*/
abstract int excessNanos(long d, long m);
/**
* Performs a timed {@link Object#wait(long, int) Object.wait}
* using this time unit.
* This is a convenience method that converts timeout arguments
* into the form required by the {@code Object.wait} method.
* <p>
* <p>For example, you could implement a blocking {@code poll}
* method (see {@link BlockingQueue#poll BlockingQueue.poll})
* using:
* <p>
* <pre> {@code
* public synchronized Object poll(long timeout, TimeUnit unit)
* throws InterruptedException {
* while (empty) {
* unit.timedWait(this, timeout);
* ...
* }
* }}</pre>
*
* @param obj the object to wait on
* @param timeout the maximum time to wait. If less than
* or equal to zero, do not wait at all.
* @throws InterruptedException if interrupted while waiting
*/
public void timedWait(Object obj, long timeout) throws InterruptedException {
if (timeout > 0) {
long ms = toMillis(timeout);
int ns = excessNanos(timeout, ms);
obj.wait(ms, ns);
}
}
/**
* Performs a timed {@link Thread#join(long, int) Thread.join}
* using this time unit.
* This is a convenience method that converts time arguments into the
* form required by the {@code Thread.join} method.
*
* @param thread the thread to wait for
* @param timeout the maximum time to wait. If less than
* or equal to zero, do not wait at all.
* @throws InterruptedException if interrupted while waiting
*/
public void timedJoin(Thread thread, long timeout) throws InterruptedException {
if (timeout > 0) {
long ms = toMillis(timeout);
int ns = excessNanos(timeout, ms);
thread.join(ms, ns);
}
}
/**
* Performs a {@link Thread#sleep(long, int) Thread.sleep} using
* this time unit.
* This is a convenience method that converts time arguments into the
* form required by the {@code Thread.sleep} method.
*
* @param timeout the minimum time to sleep. If less than
* or equal to zero, do not sleep at all.
* @throws InterruptedException if interrupted while sleeping
*/
public void sleep(long timeout) throws InterruptedException {
if (timeout > 0) {
long ms = toMillis(timeout);
int ns = excessNanos(timeout, ms);
Thread.sleep(ms, ns);
}
}
}
In case you're not familiar with this class already, it will convert a specified amount of days or seconds or whatever to gameticks or vise versa.