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org.jboss.util
Primitives (JBoss/Common API) - JBoss 3.2.7 common API Documentation 英文版文档
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org.jboss.util
Class Primitives
java.lang.Objectorg.jboss.util.Primitives
- public final class Primitives
- extends Object
Primitive utilities.
- Version:
- $Revision: 1.1.4.1 $
- Author:
- Jason Dillon
| Constructor Summary | |
Primitives()
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|
| Method Summary | |
static boolean |
equals(byte[] a,
byte[] b)
Test the equality of two byte arrays. |
static boolean |
equals(byte[] a,
int abegin,
byte[] b,
int bbegin,
int length)
Test the equality of a given sub-section of two byte arrays. |
static boolean |
equals(double a,
double b)
Test the equality of two doubles by converting their values into IEEE 754 floating-point "double format" long values. |
static boolean |
equals(float a,
float b)
Test the equality of two doubles by converting their values into IEEE 754 floating-point "single precision" bit layouts. |
static int |
toInt(long value)
Safely convert a long into a int value. |
static Boolean |
valueOf(boolean value)
Get a Boolean from a boolean, equivalent to the java 1.4 method Boolean.valueOf(boolean) |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
Primitives
public Primitives()
| Method Detail |
valueOf
public static Boolean valueOf(boolean value)
- Get a Boolean from a boolean, equivalent to the java 1.4 method Boolean.valueOf(boolean)
- Parameters:
value- the boolean- Returns:
- the Boolean equivalent
equals
public static boolean equals(double a,
double b)
- Test the equality of two doubles by converting their values into
IEEE 754 floating-point "double format" long values.
- Parameters:
a- Double to check equality with.b- Double to check equality with.- Returns:
- True if a equals b.
equals
public static boolean equals(float a,
float b)
- Test the equality of two doubles by converting their values into
IEEE 754 floating-point "single precision" bit layouts.
- Parameters:
a- Float to check equality with.b- Float to check equality with.- Returns:
- True if a equals b.
equals
public static boolean equals(byte[] a,
int abegin,
byte[] b,
int bbegin,
int length)
- Test the equality of a given sub-section of two byte arrays.
- Parameters:
a- The first byte array.abegin- The begining index of the first byte array.b- The second byte array.bbegin- The begining index of the second byte array.length- The length of the sub-section.- Returns:
- True if sub-sections are equal.
equals
public static boolean equals(byte[] a,
byte[] b)
- Test the equality of two byte arrays.
- Parameters:
a- The first byte array.b- The second byte array.- Returns:
- True if the byte arrays are equal.
toInt
public static int toInt(long value)
throws DataConversionException
- Safely convert a long into a int value.
If value is > Integer.MAX_VALUE or < Integer.MIN_VALUE then an exception will be thrown, else the value is cast down to an int.
- Parameters:
value- The long value to convert.- Returns:
- The converted value.
- Throws:
DataConversionException- Could not safely convert the value.
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