utils
Class SystemUtils

java.lang.Object
  utils.SystemUtils

public class SystemUtils
extends java.lang.Object

DocJava, Inc. http://www.docjava.com Programmer: dlyon Date: Mar 29, 2004 Time: 3:33:32 PM

Constructor Summary

SystemUtils()

Method Summary

static void	appendJavaExtensionsDirectory(java.lang.String p)
static java.lang.String	free()
static java.lang.String	getBootPath()
static java.lang.String	getClassPath()
static java.lang.String	getDefaultEncoding() Return the system default text encoding.
static java.lang.String	getDirectorySeparator()
static java.io.File	getJavaCommand()
static java.lang.String	getJavaExtensionsDirectory()
static java.lang.String	getJavaVersion()
static long	getLastModified(java.net.URL resourceUrl)
static java.lang.String	getLocationOfCurrentlyRunningProgram()
static java.lang.Object[]	getNullArray()
static java.lang.String	getPathSeparator()
static java.lang.String	getProps()
static java.io.File	getSdkCommand(java.lang.String command)
static java.lang.String	getSysInfo()
static java.io.File	getTempDirectory()
static java.io.File	getTmpDir()
static java.lang.String	getUid()
static java.util.Date	getUrlModificationDate(java.net.URL url)
static java.lang.String	getUserHome() Returns the users home directory.
static java.lang.String	getUserName()
static java.io.File	getUserPrefLocation()
static boolean	isDateGood(java.io.File canonicalFile, java.net.URL resourceUrl)
static boolean	isJava2()
static boolean	isMacJDK1_3()
static void	main(java.lang.String[] args)
static void	makeDir(java.io.File file)
static java.io.File	makeTmpDir(java.lang.String tmpDir)
static void	printJavaHome()
static void	printMethodNames(PrintStub printStub, java.lang.reflect.Method[] ma)
static void	printMethods(PrintStub printStub, java.lang.reflect.Method[] methods)
static void	printProp(java.lang.String p)
static void	printProps()
static void	printProps(PrintStub printStubFrame1)
static void	printUserDir()
static void	props()
static void	runGc()
static java.lang.String[]	runMain(java.lang.Class classToRun) This method runs the main in a class, c, in a different JVM.
static void	testClassPathBug()
static void	testPrintProps()
static void	testRunMain()

Methods inherited from class java.lang.Object

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

Constructor Detail

SystemUtils

public SystemUtils()

Method Detail

getUrlModificationDate

public static java.util.Date getUrlModificationDate(java.net.URL url)
                                             throws java.io.IOException

Throws:

java.io.IOException

getUid

public static java.lang.String getUid()

getJavaExtensionsDirectory

public static java.lang.String getJavaExtensionsDirectory()

getBootPath

public static java.lang.String getBootPath()

appendJavaExtensionsDirectory

public static void appendJavaExtensionsDirectory(java.lang.String p)

getTempDirectory

public static java.io.File getTempDirectory()
                                     throws java.io.IOException

Returns:

a temp directory that can be deleted upon exit

Throws:

java.io.IOException

getLocationOfCurrentlyRunningProgram

public static java.lang.String getLocationOfCurrentlyRunningProgram()

Returns:

the location of the program that is running. Typically something like:
/User/lyon/current/j4p.

getDirectorySeparator

public static java.lang.String getDirectorySeparator()

Returns:

the character(s) used to delimit directories in path names. For example:
/home/lyon/jaxbtest, the file separator is "/".

getPathSeparator

public static java.lang.String getPathSeparator()

Returns:

return the character use to delimit the paths in a list of paths.

printProps

public static void printProps()

getProps

public static java.lang.String getProps()

testPrintProps

public static void testPrintProps()

free

public static java.lang.String free()

Returns:

a string that describes the JVM's free RAM

runGc

public static void runGc()

props

public static void props()

printProp

public static void printProp(java.lang.String p)

getClassPath

public static java.lang.String getClassPath()

printJavaHome

public static void printJavaHome()

printUserDir

public static void printUserDir()

getUserHome

public static java.lang.String getUserHome()

Returns the users home directory. For example: C:\Documents and Settings\dlyon

getUserPrefLocation

public static java.io.File getUserPrefLocation()

getSysInfo

public static java.lang.String getSysInfo()

testRunMain

public static void testRunMain()
                        throws java.io.IOException

Throws:

java.io.IOException

isJava2

public static boolean isJava2()

Returns:

true if the present version of Java is java2.

getNullArray

public static java.lang.Object[] getNullArray()

testClassPathBug

public static void testClassPathBug()

printProps

public static void printProps(PrintStub printStubFrame1)

printMethods

public static void printMethods(PrintStub printStub,
                                java.lang.reflect.Method[] methods)

printMethodNames

public static void printMethodNames(PrintStub printStub,
                                    java.lang.reflect.Method[] ma)

getSdkCommand

public static java.io.File getSdkCommand(java.lang.String command)

getJavaCommand

public static java.io.File getJavaCommand()

Returns:

the location of the java command.

runMain

public static java.lang.String[] runMain(java.lang.Class classToRun)
                                  throws java.io.IOException

This method runs the main in a class, c, in a different JVM. It uses the classpath of the current run-time environments

Throws:

java.io.IOException

getTmpDir

public static java.io.File getTmpDir()

isDateGood

public static boolean isDateGood(java.io.File canonicalFile,
                                 java.net.URL resourceUrl)
                          throws java.io.IOException

Throws:

java.io.IOException

getLastModified

public static long getLastModified(java.net.URL resourceUrl)
                            throws java.io.IOException

Throws:

java.io.IOException

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

Throws:

java.io.IOException

makeTmpDir

public static java.io.File makeTmpDir(java.lang.String tmpDir)

makeDir

public static void makeDir(java.io.File file)

getDefaultEncoding

public static java.lang.String getDefaultEncoding()

Return the system default text encoding. The jdk 1.5 has a method for this, not jdk 1.4. Hence this method.

Returns:

the system default text encoding.

getUserName

public static java.lang.String getUserName()

getJavaVersion

public static java.lang.String getJavaVersion()

isMacJDK1_3

public static boolean isMacJDK1_3()