cn.hutool.core.lang.ref

Enum ReferenceType

java.lang.Object

java.lang.Enum<ReferenceType>

cn.hutool.core.lang.ref.ReferenceType

All Implemented Interfaces:

Serializable, Comparable<ReferenceType>

public enum ReferenceType
extends Enum<ReferenceType>

引用类型

Author:

Looly

Enum Constant Summary

Enum Constants

Enum Constant and Description
PHANTOM 虚引用，在GC时发现虚引用对象，会将PhantomReference插入ReferenceQueue。
SOFT 软引用，在GC报告内存不足时会被GC回收
STRONG 强引用，不回收
WEAK 弱引用，在GC时发现弱引用会回收其对象

Method Summary

Modifier and Type	Method and Description
static ReferenceType	valueOf(String name) Returns the enum constant of this type with the specified name.
static ReferenceType[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

STRONG

public static final ReferenceType STRONG

强引用，不回收

SOFT

public static final ReferenceType SOFT

软引用，在GC报告内存不足时会被GC回收

WEAK

public static final ReferenceType WEAK

弱引用，在GC时发现弱引用会回收其对象

PHANTOM

public static final ReferenceType PHANTOM

虚引用，在GC时发现虚引用对象，会将PhantomReference插入ReferenceQueue。
此时对象未被真正回收，要等到ReferenceQueue被真正处理后才会被回收。

Method Detail

values

public static ReferenceType[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (ReferenceType c : ReferenceType.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static ReferenceType valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null