ObjectUtil (Netty 4.1.109.Final API文档 - 即时通讯网(52im.net))

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

All Methods Static Methods Concrete Methods
限定符和类型	方法和说明
`static int`	`checkInRange(int i, int start, int end, java.lang.String name)` Checks that the given argument is in range.
`static long`	`checkInRange(long l, long start, long end, java.lang.String name)` Checks that the given argument is in range.
`static byte[]`	`checkNonEmpty(byte[] array, java.lang.String name)` Checks that the given argument is neither null nor empty.
`static char[]`	`checkNonEmpty(char[] array, java.lang.String name)` Checks that the given argument is neither null nor empty.
`static java.lang.CharSequence`	`checkNonEmpty(java.lang.CharSequence value, java.lang.String name)` Checks that the given argument is neither null nor empty.
`static java.lang.String`	`checkNonEmpty(java.lang.String value, java.lang.String name)` Checks that the given argument is neither null nor empty.
`static <T> T[]`	`checkNonEmpty(T[] array, java.lang.String name)` Checks that the given argument is neither null nor empty.
`static <K,V,T extends java.util.Map<K,V>> T`	`checkNonEmpty(T value, java.lang.String name)` Checks that the given argument is neither null nor empty.
`static <T extends java.util.Collection<?>> T`	`checkNonEmpty(T collection, java.lang.String name)` Checks that the given argument is neither null nor empty.
`static java.lang.String`	`checkNonEmptyAfterTrim(java.lang.String value, java.lang.String name)` Trims the given argument and checks whether it is neither null nor empty.
`static <T> T`	`checkNotNull(T arg, java.lang.String text)` Checks that the given argument is not null.
`static <T> T`	`checkNotNullArrayParam(T value, int index, java.lang.String name)` Checks that the given argument is not null.
`static <T> T`	`checkNotNullWithIAE(T arg, java.lang.String paramName)` Checks that the given argument is not null.
`static double`	`checkPositive(double d, java.lang.String name)` Checks that the given argument is strictly positive.
`static float`	`checkPositive(float f, java.lang.String name)` Checks that the given argument is strictly positive.
`static int`	`checkPositive(int i, java.lang.String name)` Checks that the given argument is strictly positive.
`static long`	`checkPositive(long l, java.lang.String name)` Checks that the given argument is strictly positive.
`static double`	`checkPositiveOrZero(double d, java.lang.String name)` Checks that the given argument is positive or zero.
`static float`	`checkPositiveOrZero(float f, java.lang.String name)` Checks that the given argument is positive or zero.
`static int`	`checkPositiveOrZero(int i, java.lang.String name)` Checks that the given argument is positive or zero.
`static long`	`checkPositiveOrZero(long l, java.lang.String name)` Checks that the given argument is positive or zero.
`static <T> T[]`	`deepCheckNotNull(java.lang.String text, T... varargs)` Check that the given varargs is not null and does not contain elements null elements.
`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.
  - deepCheckNotNull
```
public static <T> T[] deepCheckNotNull(java.lang.String text,
                                       T... varargs)
```
    Check that the given varargs is not null and does not contain elements null elements. If it is, throws NullPointerException. Otherwise, returns the argument.
  - checkNotNullWithIAE
```
public static <T> T checkNotNullWithIAE(T arg,
                                        java.lang.String paramName)
                                 throws java.lang.IllegalArgumentException
```
    Checks that the given argument is not null. If it is, throws IllegalArgumentException. Otherwise, returns the argument.
    
    抛出:
    
    java.lang.IllegalArgumentException
  - checkNotNullArrayParam
```
public static <T> T checkNotNullArrayParam(T value,
                                           int index,
                                           java.lang.String name)
                                    throws java.lang.IllegalArgumentException
```
    Checks that the given argument is not null. If it is, throws IllegalArgumentException. Otherwise, returns the argument.
    
    类型参数:
    
    T - type of the given argument value.
    
    参数:
    
    name - of the parameter, belongs to the exception message.
    
    index - of the array, belongs to the exception message.
    
    value - to check.
    
    返回:
    
    the given argument value.
    
    抛出:
    
    java.lang.IllegalArgumentException - if value is null.
  - 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 l,
                                 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 double checkPositive(double d,
                                   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 float checkPositive(float f,
                                  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 l,
                                       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 double checkPositiveOrZero(double d,
                                         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 float checkPositiveOrZero(float f,
                                        java.lang.String name)
```
    Checks that the given argument is positive or zero. If it is not, throws IllegalArgumentException. Otherwise, returns the argument.
  - checkInRange
```
public static int checkInRange(int i,
                               int start,
                               int end,
                               java.lang.String name)
```
    Checks that the given argument is in range. If it is not, throws IllegalArgumentException. Otherwise, returns the argument.
  - checkInRange
```
public static long checkInRange(long l,
                                long start,
                                long end,
                                java.lang.String name)
```
    Checks that the given argument is in range. 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.
  - checkNonEmpty
```
public static byte[] checkNonEmpty(byte[] 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.
  - checkNonEmpty
```
public static char[] checkNonEmpty(char[] 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.
  - checkNonEmpty
```
public static <T extends java.util.Collection<?>> T checkNonEmpty(T collection,
                                                                  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.
  - checkNonEmpty
```
public static java.lang.String checkNonEmpty(java.lang.String value,
                                             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.
  - checkNonEmpty
```
public static <K,V,T extends java.util.Map<K,V>> T checkNonEmpty(T value,
                                                                 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.
  - checkNonEmpty
```
public static java.lang.CharSequence checkNonEmpty(java.lang.CharSequence value,
                                                   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.
  - checkNonEmptyAfterTrim
```
public static java.lang.String checkNonEmptyAfterTrim(java.lang.String value,
                                                      java.lang.String name)
```
    Trims the given argument and checks whether it is neither null nor empty. If it is, throws NullPointerException or IllegalArgumentException. Otherwise, returns the trimmed argument.
    
    参数:
    
    value - to trim and check.
    
    name - of the parameter.
    
    返回:
    
    the trimmed (not the original) value.
    
    抛出:
    
    java.lang.NullPointerException - if value is null.
    
    java.lang.IllegalArgumentException - if the trimmed value is empty.
  - 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

类 ObjectUtil

方法概要

从类继承的方法 java.lang.Object

方法详细资料

checkNotNull

deepCheckNotNull

checkNotNullWithIAE

checkNotNullArrayParam

checkPositive

checkPositive

checkPositive

checkPositive

checkPositiveOrZero

checkPositiveOrZero

checkPositiveOrZero

checkPositiveOrZero

checkInRange

checkInRange

checkNonEmpty

checkNonEmpty

checkNonEmpty

checkNonEmpty

checkNonEmpty

checkNonEmpty

checkNonEmpty

checkNonEmptyAfterTrim

intValue

longValue