org.jboss.netty.util.internal

类 SystemPropertyUtil

java.lang.Object

org.jboss.netty.util.internal.SystemPropertyUtil

public final class SystemPropertyUtil
extends java.lang.Object

A collection of utility methods to retrieve and parse the values of the Java system properties.

方法概要

方法

限定符和类型	方法和说明
static boolean	contains(java.lang.String key) Returns true if and only if the system property with the specified key exists.
static java.lang.String	get(java.lang.String key) Returns the value of the Java system property with the specified key, while falling back to null if the property access fails.
static java.lang.String	get(java.lang.String key, java.lang.String def) Returns the value of the Java system property with the specified key, while falling back to the specified default value if the property access fails.
static boolean	getBoolean(java.lang.String key, boolean def) Returns the value of the Java system property with the specified key, while falling back to the specified default value if the property access fails.
static int	getInt(java.lang.String key, int def) Returns the value of the Java system property with the specified key, while falling back to the specified default value if the property access fails.
static long	getLong(java.lang.String key, long def) Returns the value of the Java system property with the specified key, while falling back to the specified default value if the property access fails.

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

contains

public static boolean contains(java.lang.String key)

Returns true if and only if the system property with the specified key exists.

get

public static java.lang.String get(java.lang.String key)

Returns the value of the Java system property with the specified key, while falling back to null if the property access fails.

返回:

the property value or null

get

public static java.lang.String get(java.lang.String key,
                   java.lang.String def)

Returns the value of the Java system property with the specified key, while falling back to the specified default value if the property access fails.

返回:

the property value. def if there's no such property or if an access to the specified property is not allowed.

getBoolean

public static boolean getBoolean(java.lang.String key,
                 boolean def)

Returns the value of the Java system property with the specified key, while falling back to the specified default value if the property access fails.

返回:

the property value. def if there's no such property or if an access to the specified property is not allowed.

getInt

public static int getInt(java.lang.String key,
         int def)

Returns the value of the Java system property with the specified key, while falling back to the specified default value if the property access fails.

返回:

the property value. def if there's no such property or if an access to the specified property is not allowed.

getLong

public static long getLong(java.lang.String key,
           long def)

Returns the value of the Java system property with the specified key, while falling back to the specified default value if the property access fails.

返回:

the property value. def if there's no such property or if an access to the specified property is not allowed.