io.netty.util.internal

Class SystemPropertyUtil

java.lang.Object

io.netty.util.internal.SystemPropertyUtil

public final class SystemPropertyUtil
extends Object

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

Method Summary

Modifier and Type	Method and Description
static boolean	contains(String key) Returns true if and only if the system property with the specified key exists.
static String	get(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 String	get(String key, 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(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(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(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.

Methods inherited from class java.lang.Object

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

Method Detail

contains

public static boolean contains(String key)

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

get

public static String get(String key)

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

Returns:

the property value or null

get

public static String get(String key,
                         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.

Returns:

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(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.

Returns:

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(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.

Returns:

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(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.

Returns:

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