public final class ObjectUtils
extends java.lang.Object
Constructor and Description |
---|
ObjectUtils() |
Modifier and Type | Method and Description |
---|---|
static void |
checkArg(boolean expression,
java.lang.Object errorMessage)
Throws IAE if expression evaluates to false.
|
static void |
checkNotNull(java.lang.Object reference,
java.lang.Object errorMessage)
Throws NPE if reference is null.
|
static boolean |
equal(java.lang.Object a,
java.lang.Object b)
Returns true if both arguments are null or if both are not null and a.equals(b)
|
static int |
hashCode(java.lang.Object... objs)
Returns a hashcode of several arguments grouped together in an array.
If there is only a single argument then its hashcode will be returned if the argument is not null. |
public static int hashCode(java.lang.Object... objs)
objs
- one or more elementspublic static boolean equal(java.lang.Object a, java.lang.Object b)
a
- an Object referenceb
- an Object referencepublic static void checkNotNull(java.lang.Object reference, java.lang.Object errorMessage)
reference
- an Object referenceerrorMessage
- an additional message to be supplied to the NPE if the reference is null.public static void checkArg(boolean expression, java.lang.Object errorMessage)
expression
- any boolean expressionerrorMessage
- an additional message to be supplied to the IAE if the reference is null.