io.netty.util.internal

类 ObjectUtil

java.lang.Object

io.netty.util.internal.ObjectUtil

public final class ObjectUtil
extends java.lang.Object

A grab-bag of useful utility methods.

方法概要

方法

限定符和类型	方法和说明
static <T> T[]	checkNonEmpty(T[] array, java.lang.String name) Checks that the given argument is neither null nor empty.
static <T> T	checkNotNull(T arg, java.lang.String text) Checks that the given argument is not null.
static int	checkPositive(int i, java.lang.String name) Checks that the given argument is strictly positive.
static long	checkPositive(long i, java.lang.String name) Checks that the given argument is strictly positive.
static int	checkPositiveOrZero(int i, java.lang.String name) Checks that the given argument is positive or zero.
static long	checkPositiveOrZero(long i, java.lang.String name) Checks that the given argument is positive or zero.
static int	intValue(java.lang.Integer wrapper, int defaultValue) Resolves a possibly null Integer to a primitive int, using a default value.
static long	longValue(java.lang.Long wrapper, long defaultValue) Resolves a possibly null Long to a primitive long, using a default value.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

方法详细资料

checkNotNull

public static <T> T checkNotNull(T arg,
                 java.lang.String text)

Checks that the given argument is not null. If it is, throws NullPointerException. Otherwise, returns the argument.

checkPositive

public static int checkPositive(int i,
                java.lang.String name)

Checks that the given argument is strictly positive. If it is not, throws IllegalArgumentException. Otherwise, returns the argument.

checkPositive

public static long checkPositive(long i,
                 java.lang.String name)

Checks that the given argument is strictly positive. If it is not, throws IllegalArgumentException. Otherwise, returns the argument.

checkPositiveOrZero

public static int checkPositiveOrZero(int i,
                      java.lang.String name)

Checks that the given argument is positive or zero. If it is not , throws IllegalArgumentException. Otherwise, returns the argument.

checkPositiveOrZero

public static long checkPositiveOrZero(long i,
                       java.lang.String name)

Checks that the given argument is positive or zero. If it is not, throws IllegalArgumentException. Otherwise, returns the argument.

checkNonEmpty

public static <T> T[] checkNonEmpty(T[] array,
                    java.lang.String name)

Checks that the given argument is neither null nor empty. If it is, throws NullPointerException or IllegalArgumentException. Otherwise, returns the argument.

intValue

public static int intValue(java.lang.Integer wrapper,
           int defaultValue)

Resolves a possibly null Integer to a primitive int, using a default value.

参数:

wrapper - the wrapper

defaultValue - the default value

返回:

the primitive value

longValue

public static long longValue(java.lang.Long wrapper,
             long defaultValue)

Resolves a possibly null Long to a primitive long, using a default value.

参数:

wrapper - the wrapper

defaultValue - the default value

返回:

the primitive value