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Comparing jsr166/src/main/java/util/concurrent/TimeUnit.java (file contents):
Revision 1.27 by dl, Tue Mar 8 12:27:11 2005 UTC vs.
Revision 1.50 by dl, Thu Mar 24 11:41:51 2016 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by Doug Lea with assistance from members of JCP JSR-166
3	<	* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
5	<	*/
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	*/
6
7		package java.util.concurrent;
8
9	+	import java.time.temporal.ChronoUnit;
10	+	import java.util.Objects;
11	+
12		/**
13	<	* A <tt>TimeUnit</tt> represents time durations at a given unit of
13	>	* A {@code TimeUnit} represents time durations at a given unit of
14		* granularity and provides utility methods to convert across units,
15		* and to perform timing and delay operations in these units.  A
16	<	* <tt>TimeUnit</tt> does not maintain time information, but only
16	>	* {@code TimeUnit} does not maintain time information, but only
17		* helps organize and use time representations that may be maintained
18		* separately across various contexts.  A nanosecond is defined as one
19		* thousandth of a microsecond, a microsecond as one thousandth of a
#	Line 18 | Line 21 | package java.util.concurrent;
21		* as sixty seconds, an hour as sixty minutes, and a day as twenty four
22		* hours.
23		*
24	<	* <p>A <tt>TimeUnit</tt> is mainly used to inform time-based methods
24	>	* <p>A {@code TimeUnit} is mainly used to inform time-based methods
25		* how a given timing parameter should be interpreted. For example,
26		* the following code will timeout in 50 milliseconds if the {@link
27		* java.util.concurrent.locks.Lock lock} is not available:
28		*
29	<	* <pre>  Lock lock = ...;
30	<	*  if ( lock.tryLock(50L, TimeUnit.MILLISECONDS) ) ...
31	<	* </pre>
29	>	* <pre> {@code
30	>	* Lock lock = ...;
31	>	* if (lock.tryLock(50L, TimeUnit.MILLISECONDS)) ...}</pre>
32	>	*
33		* while this code will timeout in 50 seconds:
34	<	* <pre>
35	<	*  Lock lock = ...;
36	<	*  if ( lock.tryLock(50L, TimeUnit.SECONDS) ) ...
33	<	* </pre>
34	>	* <pre> {@code
35	>	* Lock lock = ...;
36	>	* if (lock.tryLock(50L, TimeUnit.SECONDS)) ...}</pre>
37		*
38		* Note however, that there is no guarantee that a particular timeout
39		* implementation will be able to notice the passage of time at the
40	<	* same granularity as the given <tt>TimeUnit</tt>.
40	>	* same granularity as the given {@code TimeUnit}.
41		*
42		* @since 1.5
43		* @author Doug Lea
44		*/
45		public enum TimeUnit {
46	<	NANOSECONDS (0) {
47	<	public long toNanos(long d)   { return d; }
48	<	public long toMicros(long d)  { return d/(C1/C0); }
49	<	public long toMillis(long d)  { return d/(C2/C0); }
50	<	public long toSeconds(long d) { return d/(C3/C0); }
51	<	public long toMinutes(long d) { return d/(C4/C0); }
52	<	public long toHours(long d)   { return d/(C5/C0); }
53	<	public long toDays(long d)    { return d/(C6/C0); }
54	<	public long convert(long d, TimeUnit u) { return u.toNanos(d); }
55	<	int excessNanos(long d, long m) { return (int)(d - (m*C2)); }
56	<	},
57	<	MICROSECONDS (1) {
58	<	public long toNanos(long d)   { return x(d, C1/C0, MAX/(C1/C0)); }
59	<	public long toMicros(long d)  { return d; }
60	<	public long toMillis(long d)  { return d/(C2/C1); }
61	<	public long toSeconds(long d) { return d/(C3/C1); }
62	<	public long toMinutes(long d) { return d/(C4/C1); }
63	<	public long toHours(long d)   { return d/(C5/C1); }
64	<	public long toDays(long d)    { return d/(C6/C1); }
65	<	public long convert(long d, TimeUnit u) { return u.toMicros(d); }
66	<	int excessNanos(long d, long m) { return (int)((d*C1) - (m*C2)); }
67	<	},
68	<	MILLISECONDS (2) {
69	<	public long toNanos(long d)   { return x(d, C2/C0, MAX/(C2/C0)); }
70	<	public long toMicros(long d)  { return x(d, C2/C1, MAX/(C2/C1)); }
71	<	public long toMillis(long d)  { return d; }
72	<	public long toSeconds(long d) { return d/(C3/C2); }
73	<	public long toMinutes(long d) { return d/(C4/C2); }
74	<	public long toHours(long d)   { return d/(C5/C2); }
75	<	public long toDays(long d)    { return d/(C6/C2); }
76	<	public long convert(long d, TimeUnit u) { return u.toMillis(d); }
77	<	int excessNanos(long d, long m) { return 0; }
78	<	},
79	<	SECONDS (3) {
80	<	public long toNanos(long d)   { return x(d, C3/C0, MAX/(C3/C0)); }
81	<	public long toMicros(long d)  { return x(d, C3/C1, MAX/(C3/C1)); }
82	<	public long toMillis(long d)  { return x(d, C3/C2, MAX/(C3/C2)); }
83	<	public long toSeconds(long d) { return d; }
84	<	public long toMinutes(long d) { return d/(C4/C3); }
85	<	public long toHours(long d)   { return d/(C5/C3); }
86	<	public long toDays(long d)    { return d/(C6/C3); }
87	<	public long convert(long d, TimeUnit u) { return u.toSeconds(d); }
88	<	int excessNanos(long d, long m) { return 0; }
89	<	},
90	<	MINUTES (4) {
91	<	public long toNanos(long d)   { return x(d, C4/C0, MAX/(C4/C0)); }
92	<	public long toMicros(long d)  { return x(d, C4/C1, MAX/(C4/C1)); }
93	<	public long toMillis(long d)  { return x(d, C4/C2, MAX/(C4/C2)); }
94	<	public long toSeconds(long d) { return x(d, C4/C3, MAX/(C4/C3)); }
95	<	public long toMinutes(long d) { return d; }
96	<	public long toHours(long d)   { return d/(C5/C4); }
97	<	public long toDays(long d)    { return d/(C6/C4); }
98	<	public long convert(long d, TimeUnit u) { return u.toMinutes(d); }
99	<	int excessNanos(long d, long m) { return 0; }
100	<	},
101	<	HOURS (5) {
102	<	public long toNanos(long d)   { return x(d, C5/C0, MAX/(C5/C0)); }
103	<	public long toMicros(long d)  { return x(d, C5/C1, MAX/(C5/C1)); }
104	<	public long toMillis(long d)  { return x(d, C5/C2, MAX/(C5/C2)); }
105	<	public long toSeconds(long d) { return x(d, C5/C3, MAX/(C5/C3)); }
106	<	public long toMinutes(long d) { return x(d, C5/C4, MAX/(C5/C4)); }
107	<	public long toHours(long d)   { return d; }
108	<	public long toDays(long d)    { return d/(C6/C5); }
109	<	public long convert(long d, TimeUnit u) { return u.toHours(d); }
110	<	int excessNanos(long d, long m) { return 0; }
111	<	},
112	<	DAYS (6) {
113	<	public long toNanos(long d)   { return x(d, C6/C0, MAX/(C6/C0)); }
114	<	public long toMicros(long d)  { return x(d, C6/C1, MAX/(C6/C1)); }
115	<	public long toMillis(long d)  { return x(d, C6/C2, MAX/(C6/C2)); }
116	<	public long toSeconds(long d) { return x(d, C6/C3, MAX/(C6/C3)); }
117	<	public long toMinutes(long d) { return x(d, C6/C4, MAX/(C6/C4)); }
118	<	public long toHours(long d)   { return x(d, C6/C5, MAX/(C6/C5)); }
119	<	public long toDays(long d)    { return d; }
120	<	public long convert(long d, TimeUnit u) { return u.toDays(d); }
121	<	int excessNanos(long d, long m) { return 0; }
122	<	};
123	<
124	<	/**
125	<	* The index of this unit. This value is no longer used in this
126	<	* version of this class, but is retained for serialization
127	<	* compatibility with previous version.
128	<	*/
129	<	private final int index;
130	<
131	<	/** Internal constructor */
132	<	TimeUnit(int index) {
133	<	this.index = index;
134	<	}
135	<
136	<	// Handy constants for conversion methods
137	<	static final long C0 = 1L;
138	<	static final long C1 = C0 * 1000L;
136	<	static final long C2 = C1 * 1000L;
137	<	static final long C3 = C2 * 1000L;
138	<	static final long C4 = C3 * 60L;
139	<	static final long C5 = C4 * 60L;
140	<	static final long C6 = C5 * 24L;
141	<
142	<	static final long MAX = Long.MAX_VALUE;
143	<
144	<	/**
145	<	* Scale d by m, checking for overflow.
146	<	* This has a short name to make above code more readable.
147	<	*/
148	<	static long x(long d, long m, long over) {
149	<	if (d >  over) return Long.MAX_VALUE;
150	<	if (d < -over) return Long.MIN_VALUE;
151	<	return d * m;
152	<	}
153	<
154	<	/**
155	<	* Convert the given time duration in the given unit to this
156	<	* unit.  Conversions from finer to coarser granularities
157	<	* truncate, so lose precision. For example converting
158	<	* <tt>999</tt> milliseconds to seconds results in
159	<	* <tt>0</tt>. Conversions from coarser to finer granularities
160	<	* with arguments that would numerically overflow saturate to
161	<	* <tt>Long.MIN_VALUE</tt> if negative or <tt>Long.MAX_VALUE</tt>
162	<	* if positive.
46	>	/**
47	>	* Time unit representing one thousandth of a microsecond.
48	>	*/
49	>	NANOSECONDS(1L), // (cannot use symbolic scale names here)
50	>	/**
51	>	* Time unit representing one thousandth of a millisecond.
52	>	*/
53	>	MICROSECONDS(1000L),
54	>	/**
55	>	* Time unit representing one thousandth of a second.
56	>	*/
57	>	MILLISECONDS(1000L * 1000L),
58	>	/**
59	>	* Time unit representing one second.
60	>	*/
61	>	SECONDS(1000L * 1000L * 1000L),
62	>	/**
63	>	* Time unit representing sixty seconds.
64	>	* @since 1.6
65	>	*/
66	>	MINUTES(1000L * 1000L * 1000L * 60L),
67	>	/**
68	>	* Time unit representing sixty minutes.
69	>	* @since 1.6
70	>	*/
71	>	HOURS(1000L * 1000L * 1000L * 60L * 60L),
72	>	/**
73	>	* Time unit representing twenty four hours.
74	>	* @since 1.6
75	>	*/
76	>	DAYS(1000L * 1000L * 1000L * 60L * 60L * 24L);
77	>
78	>	// Scales as constants
79	>	private static final long NANO_SCALE   = 1L;
80	>	private static final long MICRO_SCALE  = 1000L * NANO_SCALE;
81	>	private static final long MILLI_SCALE  = 1000L * MICRO_SCALE;
82	>	private static final long SECOND_SCALE = 1000L * MILLI_SCALE;
83	>	private static final long MINUTE_SCALE = 60L * SECOND_SCALE;
84	>	private static final long HOUR_SCALE   = 60L * MINUTE_SCALE;
85	>	private static final long DAY_SCALE    = 24L * HOUR_SCALE;
86	>
87	>	/*
88	>	* Instances cache conversion ratios and saturation cutoffs for
89	>	* the two units commonly used for JDK timing, used in methods
90	>	* toNanos and toMillis. Other cases compute them, in method cvt.
91	>	*/
92	>
93	>	private final long scale;
94	>	private final long maxNanos;
95	>	private final long millisRatio;
96	>	private final long maxMillis;
97	>
98	>	TimeUnit(long scale) {
99	>	this.scale = scale;
100	>	this.maxNanos = Long.MAX_VALUE / scale;
101	>	long r = (scale >= MILLI_SCALE ? scale / MILLI_SCALE :
102	>	MILLI_SCALE / scale);
103	>	this.millisRatio = r;
104	>	this.maxMillis = Long.MAX_VALUE / r;
105	>	}
106	>
107	>	/**
108	>	* General conversion utility.
109	>	*
110	>	* @param d duration
111	>	* @param dst result scale unit
112	>	* @param src source scale unit
113	>	*/
114	>	private static long cvt(long d, long dst, long src) {
115	>	long r, m;
116	>	if (src == dst)
117	>	return d;
118	>	else if (src < dst)
119	>	return d / (dst / src);
120	>	else if (d > (m = Long.MAX_VALUE / (r = src / dst)))
121	>	return Long.MAX_VALUE;
122	>	else if (d < -m)
123	>	return Long.MIN_VALUE;
124	>	else
125	>	return d * r;
126	>	}
127	>
128	>	/**
129	>	* Converts the given time duration in the given unit to this unit.
130	>	* Conversions from finer to coarser granularities truncate, so
131	>	* lose precision. For example, converting {@code 999} milliseconds
132	>	* to seconds results in {@code 0}. Conversions from coarser to
133	>	* finer granularities with arguments that would numerically
134	>	* overflow saturate to {@code Long.MIN_VALUE} if negative or
135	>	* {@code Long.MAX_VALUE} if positive.
136	>	*
137	>	* <p>For example, to convert 10 minutes to milliseconds, use:
138	>	* {@code TimeUnit.MILLISECONDS.convert(10L, TimeUnit.MINUTES)}
139		*
140	<	* @param duration the time duration in the given <tt>unit</tt>
141	<	* @param unit the unit of the <tt>duration</tt> argument
140	>	* @param sourceDuration the time duration in the given {@code sourceUnit}
141	>	* @param sourceUnit the unit of the {@code sourceDuration} argument
142		* @return the converted duration in this unit,
143	<	* or <tt>Long.MIN_VALUE</tt> if conversion would negatively
144	<	* overflow, or <tt>Long.MAX_VALUE</tt> if it would positively overflow.
143	>	* or {@code Long.MIN_VALUE} if conversion would negatively
144	>	* overflow, or {@code Long.MAX_VALUE} if it would positively overflow.
145		*/
146	<	public abstract long convert(long duration, TimeUnit unit);
147	<
146	>	public long convert(long sourceDuration, TimeUnit sourceUnit) {
147	>	return cvt(sourceDuration, scale, sourceUnit.scale);
148	>	}
149	>
150		/**
151	<	* Equivalent to <tt>NANOSECONDS.convert(duration, this)</tt>.
151	>	* Equivalent to
152	>	* {@link #convert(long, TimeUnit) NANOSECONDS.convert(duration, this)}.
153		* @param duration the duration
154		* @return the converted duration,
155	<	* or <tt>Long.MIN_VALUE</tt> if conversion would negatively
156	<	* overflow, or <tt>Long.MAX_VALUE</tt> if it would positively overflow.
178	<	* @see #convert
155	>	* or {@code Long.MIN_VALUE} if conversion would negatively
156	>	* overflow, or {@code Long.MAX_VALUE} if it would positively overflow.
157		*/
158	<	public abstract long toNanos(long duration);
159	<
158	>	public long toNanos(long duration) {
159	>	long s, m;
160	>	if ((s = scale) == NANO_SCALE)
161	>	return duration;
162	>	else if (duration > (m = maxNanos))
163	>	return Long.MAX_VALUE;
164	>	else if (duration < -m)
165	>	return Long.MIN_VALUE;
166	>	else
167	>	return duration * s;
168	>	}
169	>
170		/**
171	<	* Equivalent to <tt>MICROSECONDS.convert(duration, this)</tt>.
171	>	* Equivalent to
172	>	* {@link #convert(long, TimeUnit) MICROSECONDS.convert(duration, this)}.
173		* @param duration the duration
174		* @return the converted duration,
175	<	* or <tt>Long.MIN_VALUE</tt> if conversion would negatively
176	<	* overflow, or <tt>Long.MAX_VALUE</tt> if it would positively overflow.
188	<	* @see #convert
175	>	* or {@code Long.MIN_VALUE} if conversion would negatively
176	>	* overflow, or {@code Long.MAX_VALUE} if it would positively overflow.
177		*/
178	<	public abstract long toMicros(long duration);
179	<
178	>	public long toMicros(long duration) {
179	>	return cvt(duration, MICRO_SCALE, scale);
180	>	}
181	>
182		/**
183	<	* Equivalent to <tt>MILLISECONDS.convert(duration, this)</tt>.
183	>	* Equivalent to
184	>	* {@link #convert(long, TimeUnit) MILLISECONDS.convert(duration, this)}.
185		* @param duration the duration
186		* @return the converted duration,
187	<	* or <tt>Long.MIN_VALUE</tt> if conversion would negatively
188	<	* overflow, or <tt>Long.MAX_VALUE</tt> if it would positively overflow.
198	<	* @see #convert
187	>	* or {@code Long.MIN_VALUE} if conversion would negatively
188	>	* overflow, or {@code Long.MAX_VALUE} if it would positively overflow.
189		*/
190	<	public abstract long toMillis(long duration);
191	<
190	>	public long toMillis(long duration) {
191	>	long s, m;
192	>	if ((s = scale) == MILLI_SCALE)
193	>	return duration;
194	>	else if (s < MILLI_SCALE)
195	>	return duration / millisRatio;
196	>	else if (duration > (m = maxMillis))
197	>	return Long.MAX_VALUE;
198	>	else if (duration < -m)
199	>	return Long.MIN_VALUE;
200	>	else
201	>	return duration * millisRatio;
202	>	}
203	>
204		/**
205	<	* Equivalent to <tt>SECONDS.convert(duration, this)</tt>.
205	>	* Equivalent to
206	>	* {@link #convert(long, TimeUnit) SECONDS.convert(duration, this)}.
207		* @param duration the duration
208		* @return the converted duration,
209	<	* or <tt>Long.MIN_VALUE</tt> if conversion would negatively
210	<	* overflow, or <tt>Long.MAX_VALUE</tt> if it would positively overflow.
208	<	* @see #convert
209	>	* or {@code Long.MIN_VALUE} if conversion would negatively
210	>	* overflow, or {@code Long.MAX_VALUE} if it would positively overflow.
211		*/
212	<	public abstract long toSeconds(long duration);
213	<
212	>	public long toSeconds(long duration) {
213	>	return cvt(duration, SECOND_SCALE, scale);
214	>	}
215	>
216		/**
217	<	* Equivalent to <tt>MINUTES.convert(duration, this)</tt>.
217	>	* Equivalent to
218	>	* {@link #convert(long, TimeUnit) MINUTES.convert(duration, this)}.
219		* @param duration the duration
220		* @return the converted duration,
221	<	* or <tt>Long.MIN_VALUE</tt> if conversion would negatively
222	<	* overflow, or <tt>Long.MAX_VALUE</tt> if it would positively overflow.
223	<	* @see #convert
221	>	* or {@code Long.MIN_VALUE} if conversion would negatively
222	>	* overflow, or {@code Long.MAX_VALUE} if it would positively overflow.
223	>	* @since 1.6
224		*/
225	<	public abstract long toMinutes(long duration);
226	<
225	>	public long toMinutes(long duration) {
226	>	return cvt(duration, MINUTE_SCALE, scale);
227	>	}
228	>
229		/**
230	<	* Equivalent to <tt>HOURS.convert(duration, this)</tt>.
230	>	* Equivalent to
231	>	* {@link #convert(long, TimeUnit) HOURS.convert(duration, this)}.
232		* @param duration the duration
233		* @return the converted duration,
234	<	* or <tt>Long.MIN_VALUE</tt> if conversion would negatively
235	<	* overflow, or <tt>Long.MAX_VALUE</tt> if it would positively overflow.
236	<	* @see #convert
234	>	* or {@code Long.MIN_VALUE} if conversion would negatively
235	>	* overflow, or {@code Long.MAX_VALUE} if it would positively overflow.
236	>	* @since 1.6
237		*/
238	<	public abstract long toHours(long duration);
239	<
238	>	public long toHours(long duration) {
239	>	return cvt(duration, HOUR_SCALE, scale);
240	>	}
241	>
242		/**
243	<	* Equivalent to <tt>DAYS.convert(duration, this)</tt>.
243	>	* Equivalent to
244	>	* {@link #convert(long, TimeUnit) DAYS.convert(duration, this)}.
245		* @param duration the duration
246		* @return the converted duration
247	<	* @see #convert
247	>	* @since 1.6
248		*/
249	<	public abstract long toDays(long duration);
250	<
249	>	public long toDays(long duration) {
250	>	return cvt(duration, DAY_SCALE, scale);
251	>	}
252	>
253		/**
254		* Utility to compute the excess-nanosecond argument to wait,
255		* sleep, join.
#	Line 244 | Line 257 | public enum TimeUnit {
257		* @param m the number of milliseconds
258		* @return the number of nanoseconds
259		*/
260	<	abstract int excessNanos(long d, long m);
261	<
260	>	private int excessNanos(long d, long m) {
261	>	long s;
262	>	if ((s = scale) == NANO_SCALE)
263	>	return (int)(d - (m * MILLI_SCALE));
264	>	else if (s == MICRO_SCALE)
265	>	return (int)((d * 1000L) - (m * MILLI_SCALE));
266	>	else
267	>	return 0;
268	>	}
269	>
270		/**
271	<	* Perform a timed <tt>Object.wait</tt> using this time unit.
271	>	* Performs a timed {@link Object#wait(long, int) Object.wait}
272	>	* using this time unit.
273		* This is a convenience method that converts timeout arguments
274	<	* into the form required by the <tt>Object.wait</tt> method.
274	>	* into the form required by the {@code Object.wait} method.
275		*
276	<	* <p>For example, you could implement a blocking <tt>poll</tt>
276	>	* <p>For example, you could implement a blocking {@code poll}
277		* method (see {@link BlockingQueue#poll BlockingQueue.poll})
278		* using:
279		*
280	<	* <pre>  public synchronized  Object poll(long timeout, TimeUnit unit) throws InterruptedException {
281	<	*    while (empty) {
282	<	*      unit.timedWait(this, timeout);
283	<	*      ...
284	<	*    }
285	<	*  }</pre>
280	>	* <pre> {@code
281	>	* public synchronized Object poll(long timeout, TimeUnit unit)
282	>	*     throws InterruptedException {
283	>	*   while (empty) {
284	>	*     unit.timedWait(this, timeout);
285	>	*     ...
286	>	*   }
287	>	* }}</pre>
288		*
289		* @param obj the object to wait on
290	<	* @param timeout the maximum time to wait.
291	<	* @throws InterruptedException if interrupted while waiting.
292	<	* @see Object#wait(long, int)
290	>	* @param timeout the maximum time to wait. If less than
291	>	* or equal to zero, do not wait at all.
292	>	* @throws InterruptedException if interrupted while waiting
293		*/
294		public void timedWait(Object obj, long timeout)
295	<	throws InterruptedException {
295	>	throws InterruptedException {
296		if (timeout > 0) {
297		long ms = toMillis(timeout);
298		int ns = excessNanos(timeout, ms);
299		obj.wait(ms, ns);
300		}
301		}
302	<
302	>
303		/**
304	<	* Perform a timed <tt>Thread.join</tt> using this time unit.
304	>	* Performs a timed {@link Thread#join(long, int) Thread.join}
305	>	* using this time unit.
306		* This is a convenience method that converts time arguments into the
307	<	* form required by the <tt>Thread.join</tt> method.
307	>	* form required by the {@code Thread.join} method.
308	>	*
309		* @param thread the thread to wait for
310	<	* @param timeout the maximum time to wait
311	<	* @throws InterruptedException if interrupted while waiting.
312	<	* @see Thread#join(long, int)
310	>	* @param timeout the maximum time to wait. If less than
311	>	* or equal to zero, do not wait at all.
312	>	* @throws InterruptedException if interrupted while waiting
313		*/
314		public void timedJoin(Thread thread, long timeout)
315	<	throws InterruptedException {
315	>	throws InterruptedException {
316		if (timeout > 0) {
317		long ms = toMillis(timeout);
318		int ns = excessNanos(timeout, ms);
319		thread.join(ms, ns);
320		}
321		}
322	<
322	>
323		/**
324	<	* Perform a <tt>Thread.sleep</tt> using this unit.
324	>	* Performs a {@link Thread#sleep(long, int) Thread.sleep} using
325	>	* this time unit.
326		* This is a convenience method that converts time arguments into the
327	<	* form required by the <tt>Thread.sleep</tt> method.
328	<	* @param timeout the minimum time to sleep
329	<	* @throws InterruptedException if interrupted while sleeping.
330	<	* @see Thread#sleep
327	>	* form required by the {@code Thread.sleep} method.
328	>	*
329	>	* @param timeout the minimum time to sleep. If less than
330	>	* or equal to zero, do not sleep at all.
331	>	* @throws InterruptedException if interrupted while sleeping
332		*/
333		public void sleep(long timeout) throws InterruptedException {
334		if (timeout > 0) {
#	Line 309 | Line 337 | public enum TimeUnit {
337		Thread.sleep(ms, ns);
338		}
339		}
340	<
340	>
341	>	/**
342	>	* Converts this {@code TimeUnit} to the equivalent {@code ChronoUnit}.
343	>	*
344	>	* @return the converted equivalent ChronoUnit
345	>	* @since 9
346	>	*/
347	>	public ChronoUnit toChronoUnit() {
348	>	switch (this) {
349	>	case NANOSECONDS:  return ChronoUnit.NANOS;
350	>	case MICROSECONDS: return ChronoUnit.MICROS;
351	>	case MILLISECONDS: return ChronoUnit.MILLIS;
352	>	case SECONDS:      return ChronoUnit.SECONDS;
353	>	case MINUTES:      return ChronoUnit.MINUTES;
354	>	case HOURS:        return ChronoUnit.HOURS;
355	>	case DAYS:         return ChronoUnit.DAYS;
356	>	default: throw new AssertionError();
357	>	}
358	>	}
359	>
360	>	/**
361	>	* Converts a {@code ChronoUnit} to the equivalent {@code TimeUnit}.
362	>	*
363	>	* @param chronoUnit the ChronoUnit to convert
364	>	* @return the converted equivalent TimeUnit
365	>	* @throws IllegalArgumentException if {@code chronoUnit} has no
366	>	*         equivalent TimeUnit
367	>	* @throws NullPointerException if {@code chronoUnit} is null
368	>	* @since 9
369	>	*/
370	>	public static TimeUnit of(ChronoUnit chronoUnit) {
371	>	switch (Objects.requireNonNull(chronoUnit, "chronoUnit")) {
372	>	case NANOS:   return TimeUnit.NANOSECONDS;
373	>	case MICROS:  return TimeUnit.MICROSECONDS;
374	>	case MILLIS:  return TimeUnit.MILLISECONDS;
375	>	case SECONDS: return TimeUnit.SECONDS;
376	>	case MINUTES: return TimeUnit.MINUTES;
377	>	case HOURS:   return TimeUnit.HOURS;
378	>	case DAYS:    return TimeUnit.DAYS;
379	>	default:
380	>	throw new IllegalArgumentException(
381	>	"No TimeUnit equivalent for " + chronoUnit);
382	>	}
383	>	}
384	>
385		}

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