io.greptime.common.util

Class SystemPropertyUtil

java.lang.Object

io.greptime.common.util.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	getBool(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.
static Object	setProperty(String key, String value) Sets the value of the Java system property with the specified key

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 access to the specified property is not allowed.

getBool

public static boolean getBool(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 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 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 access to the specified property is not allowed.

setProperty

public static Object setProperty(String key,
                                 String value)

Sets the value of the Java system property with the specified key