20.17

java.lang.SecurityManager

THE PACKAGE JAVA.LANG

20.17.21

public void checkWrite(String file)

throws SecurityException

The general contract of this method is that it should throw a

SecurityException

if writing, modifying, creating (for output), or renaming the specified file or direc 

tory is not permitted.

This method is invoked for the current security manager ( 20.18.4) by two

constructors for

java.io.FileOutputStream

 ( 22.16.1,  22.16.2); by two con 

structors for

java.io.RandomAccessFile

 ( 22.23.1,  22.23.2); and by methods

canWrite

 ( 22.24.18),

mkdir

 ( 22.24.23), and

renameTo

 ( 22.24.27) of class

java.io.File

.

The

checkWrite

 method defined by class

SecurityManager

 always throws

a

SecurityException

. A subclass must override this method if write access to a

file is to be permitted with a security manager installed.

20.17.22

public void checkDelete(String file)

throws SecurityException

The general contract of this method is that it should throw a

SecurityException

if deleting the specified file is not permitted.

This method is invoked for the current security manager ( 20.18.4) by method

delete

 ( 22.24.28) of class

java.io.File

.

The

checkDelete

 method defined by class

SecurityManager

 always throws

a

SecurityException

. A subclass must override this method if a file deletion

operation is to be permitted with a security manager installed.

20.17.23

public void checkConnect(String host, int port)

throws SecurityException

The general contract of this method is that it should throw a

SecurityException

if connecting to the indicated

port

 of the indicated network

host

 is not permitted.

This method is invoked for the current security manager ( 20.18.4) by two

constructors for class

java.net.Socket

, methods

send

 and

receive

 of class

java.net.DatagramSocket

, and methods

getByName

 and

getAllByName

 of

class

java.net.InetAddress

. (These classes are not documented in this specifi 

cation. See

The Java Application Programming Interface

.)

The

checkConnect

 method defined by class

SecurityManager

 always

throws a

SecurityException

. A subclass must override this method if a network

connection is to be permitted with a security manager installed.

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