visad.install

Class JavaFile

java.lang.Object

java.io.File

visad.install.JavaFile

All Implemented Interfaces:

Serializable, Comparable<File>

public class JavaFile
extends File

A File object for a java executable which also extracts the JVM's version information.

See Also:

Serialized Form

Field Summary

Fields inherited from class java.io.File

pathSeparator, pathSeparatorChar, separator, separatorChar

Constructor Summary

Constructors

Constructor and Description
JavaFile(File path)
JavaFile(File path, String name)
JavaFile(String path)
JavaFile(String parent, String child)

Method Summary

Methods

Modifier and Type	Method and Description
int	getMajor() Get the major version number for this JVM.
int	getMinor() Get the minor version number for this JVM.
String	getVersionString() Get the version string returned by this JVM.
boolean	matchMinimum(int major, int minor) See if this JVM is at least as recent as the requested major/minor pair.

Methods inherited from class java.io.File

canExecute, canRead, canWrite, compareTo, createNewFile, createTempFile, createTempFile, delete, deleteOnExit, equals, exists, getAbsoluteFile, getAbsolutePath, getCanonicalFile, getCanonicalPath, getFreeSpace, getName, getParent, getParentFile, getPath, getTotalSpace, getUsableSpace, hashCode, isAbsolute, isDirectory, isFile, isHidden, lastModified, length, list, list, listFiles, listFiles, listFiles, listRoots, mkdir, mkdirs, renameTo, setExecutable, setExecutable, setLastModified, setReadable, setReadable, setReadOnly, setWritable, setWritable, toPath, toString, toURI, toURL

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

JavaFile

public JavaFile(String path)

See Also:

java.io.File(String)

JavaFile

public JavaFile(File path)

See Also:

java.io.File(File)

JavaFile

public JavaFile(String parent,
        String child)

See Also:

java.io.File(String, String)

JavaFile

public JavaFile(File path,
        String name)

See Also:

java.io.File(File, String)

Method Detail

getVersionString

public String getVersionString()

Get the version string returned by this JVM. For a 1.3.2 JVM, this method might return something like "1.3.2_01".

Returns:

the version string for this JVM.

getMajor

public int getMajor()

Get the major version number for this JVM. For a 1.3.2 JVM, this method would return 1.

Returns:

the major version number for this JVM.

getMinor

public int getMinor()

Get the minor version number for this JVM. For a 1.3.2 JVM, this method would return 3.

Returns:

the minor version number for this JVM.

matchMinimum

public final boolean matchMinimum(int major,
                   int minor)

See if this JVM is at least as recent as the requested major/minor pair.

For example, if a Java2 JVM is required, this routine would be called with major=1 and minor=2.

Parameters:

major - JVM major version number

minor - JVM minor version number

Returns:

true if the JVM is at least the requested version.