clear_property name removes the system property named name,
returning its previous value if any; see
clearProperty(...).Java_exception if name is nullJava_exception if name is emptyJava_exception if security manager doesn't allow property
modificationget_property name returns the value of the system property named
name if defined, null otherwise; see
getProperty(...).Java_exception if name is nullJava_exception if name is emptyJava_exception if security manager doesn't allow property
lookupget_property_default name default returns the value of the system
property named name if defined, default otherwise; see
getProperty(...).Java_exception if name is nullJava_exception if name is emptyJava_exception if security manager doesn't allow property
lookupset_property name value change the system property named name to
value, returning its previous value if any; see
setProperty(...).Java_exception if name is nullJava_exception if name is emptyJava_exception if security manager doesn't allow property
modificationget_env name returns the value of the environment variable named
name if defined, null otherwise; see
getenv(...).Java_exception if name is nullJava_exception if security manager doesn't allow environment
variable lookup