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jre/8
netscape
org
launcher
javafx
com
sun
webkit
media
glass
org
image
java_cup
security
openpisces
source
imageio
prism
javafx
webkit
media
sg
robot
perf
menu
property
image
charts
UnmodifiableArrayList.java
css
binding
tk
stage
application
util
font
beans
animation
TickCalculation.java
PlatformUtil.java
runtime
text
geometry
embed
iio
effect
collections
scene
logging
fxml
jmx
geom
cursor
event
print
naming
scenario
javadoc
jmx
corba
pisces
java
swing
javax
java
TickCalculation.java
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类结构
/* * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * * * * * * * * * * * * * * * * * * * * */ package com.sun.javafx.animation; import javafx.util.
Duration
; public class
TickCalculation
{ public static final int
TICKS_PER_SECOND
= 6000; private static final double
TICKS_PER_MILI
=
TICKS_PER_SECOND
/ 1000.0; private static final double
TICKS_PER_NANO
=
TICKS_PER_MILI
* 1e-6; private
TickCalculation
() {} public static long
add
(long
op1
, long
op2
) { assert (
op1
>= 0); if (
op1
==
Long
.
MAX_VALUE
||
op2
==
Long
.
MAX_VALUE
) { return
Long
.
MAX_VALUE
; } else if (
op2
==
Long
.
MIN_VALUE
) { return 0; } if (
op2
>= 0) { final long
result
=
op1
+
op2
; return (
result
< 0)?
Long
.
MAX_VALUE
:
result
; } else { return
Math
.
max
(0,
op1
+
op2
); } } public static long
sub
(long
op1
, long
op2
) { assert (
op1
>= 0); if (
op1
==
Long
.
MAX_VALUE
||
op2
==
Long
.
MIN_VALUE
) { return
Long
.
MAX_VALUE
; } else if (
op2
==
Long
.
MAX_VALUE
) { return 0; } if (
op2
>= 0) { return
Math
.
max
(0,
op1
-
op2
); } else { final long
result
=
op1
-
op2
; return
result
< 0 ?
Long
.
MAX_VALUE
:
result
; } } public static long
fromMillis
(double
millis
) { return
Math
.
round
(
TICKS_PER_MILI
*
millis
); } public static long
fromNano
(long
nano
) { return
Math
.
round
(
TICKS_PER_NANO
*
nano
); } public static long
fromDuration
(
Duration
duration
) { return
fromMillis
(
duration
.
toMillis
()); } public static long
fromDuration
(
Duration
duration
, double
rate
) { return
Math
.
round
(
TICKS_PER_MILI
*
duration
.
toMillis
() /
Math
.
abs
(
rate
)); } public static
Duration
toDuration
(long
ticks
) { return
Duration
.
millis
(
toMillis
(
ticks
)); } public static double
toMillis
(long
ticks
) { return
ticks
/
TICKS_PER_MILI
; } }
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