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This document references SDK v 1. For information on the specific version of the SDK, such as installation instructions, new features, known binary investments java jar, and fixed problems, refer to the Release Notes. The Release Notes also contain information on the following: Any pure Java application that does not rely on the specific characteristics of another platform will, with minor effort, operate on OpenVMS.
The Java runtime environment was designed to perform optimally on UNIX systems, where each process is given large quotas by default.
On OpenVMS, the default behavior gives each process lower quotas so that many processes can co-exist on a system. HP also recommends these as minimum quota settings except where noted.
When you increase the Pgflquo parameter, you should always increase the system's page file size to accommodate the new Pgflquo parameter, if needed. However, if you specified a destination and installed the kit in that alternate location, substitute that location for the default while reading this document. Also in all these references, ' x ' is the specific version number of the release you are using. Its value is typically: The following two command procedures may assist you in your initial set-up of minimal quotas binary investments java jar using the Java programming language on OpenVMS.
COM which, when executed, sets up the logical names that are appropriate for your intended usage. The following example illustrates a typical pattern for using these command procedures:. The following sections describe how to do this. To use different SDK versions in separate processes, you must first run a command procedure to set up the Java environment definitions for the version of the SDK you want to use in the given process.
The command procedures to perform the Java environment setup are version-specific, and are as follows:. For example, to run SDK v 1.
Refer to Alpha Implementation to set up the Java environment. Refer to our Software download page for product listing. To use different SDK versions in the same process, you must first run a command procedure to cancel the Java environment definitions of one version of the SDK before setting up the environment of another version of the SDK. The command procedures to accomplish the Java environment cleanup are version-specific, and are as follows:.
Once you have cancelled the Java environment, you must then run a command procedure to set up the Java environment definitions for the version of the SDK you want to use. For a list of these command procedures, see In Separate Processes. For example, to switch from using SDK v 1. Starting with SDK v 1. COM if your most recent setup command was:. Though Binary investments java jar Tools and Utilities documentation specifies all the details about operating various tools, you must interpret the literal examples of commands with an eye to OpenVMS differences.
You must understand these differences to operate these tools successfully on OpenVMS. All files read by Java code. Sometimes it is easier to fabricate a comma-separated search list of directories in OpenVMS-style file syntax. Certain operands need to be quoted; Java tools are case-sensitive throughout their operation. Binary investments java jar operands binary investments java jar automatically binary investments java jar as they are acquired from the command line.
In order to preserve the case so that these operands are acceptable to Java commands, you must quote them. The most binary investments java jar instances of this are:. Need to quote upper-case switches Memory allocation on Java command.
DCL command-line length is limited. While the limit has increased in later OS versions, constructing longer command lines is frequently convenient and sometimes necessary.
For example, you cannot build command lines like the following, if they exceed the character limit:. To work around this limitation on the OpenVMS Operating System, the RTE has been customized to allow you to place operands into a data file and then simply point to the data file on the command line. The files feature of the SDK allows you to put command operands in another file and simply name that operand file prefixed with an sign.
Note that operands on the command line need to be in quotation marks to keep DCL from uppercasing the arguments, binary investments java jar the same arguments in a file do not need to be in quotes because they are not directly interpreted by DCL. For example, you can type:.
DAT contains the potentially long list of files to compile. Note that the binary investments java jar is quoted for reason cited above. You can use "-V" with other Java commands in addition to javac binary investments java jar for example, you can write the following:. The existence or accessibility of the file specified by -V is not tested. If the file does not exist or cannot be opened, then no additional data is added to the command line being built; no error is reported.
If, within the data file used as input to "-V" processing, an operand has white space, it will not be parsed correctly. If you put the parameters into a data file called datafile1. Even if you enclose the operand in quotes, as in a data file called datafile2. The white space still breaks up the processing of the line. Note that the quotation marks are retained. When this logical is defined, spaces and tabs are no longer treated as delimiters in " -V " files. Each binary investments java jar in the file is treated as a single command-line argument.
If the line contains a space, this space will be included as part of binary investments java jar command argument. Alternatively, you can provide these parameters on the command line itself. On OpenVMS, the RTE supports a filename remapping strategy that allows you to represent otherwise-unrepresentable filenames via a filename-mapping capability. The parsing of the values for the switches -classpath-bootclasspathand -sourcepath disallows the mixing of UNIX file path syntax binary investments java jar OpenVMS file path syntax.
It is not uncommon for Java programs imported from elsewhere to have a package structure that is more than eight levels deep. To circumvent these limitations on OpenVMS, the RTE supports a filename remapping strategy that allows you to represent the deeper structure in a more shallow directory.
Refer to Description of Mapping Options to see how this is accomplished. FIS does not support pure dynamically linked library in the same manner as dlopen does. Under OpenVMS, this must be done at link time, and not at runtime.
On UNIX systems, dlopen resolves this external global at runtime. On OpenVMS, you set up the virtual machine in advance. There are differences between the virtual machines on different platforms. For more information, see I64 Implementation and Alpha Implementation. Java Sound is not supported.
The following error is reported if you attempt to use Java Sound:. Binary investments java jar seeking beyond the end of a file, the default behavior of the C RTL is to physically extend the file. Depending on the offset specified in the seek operation, this can take a long time. This behavior differs from most UNIX systems, where the file is only extended if you write to it after the seek operation. COM file, where x is the specific version number of the release you are using.
This behavior is different from that exhibited on some other operating systems, where this phenomenon is detected and the following exception is thrown:. This difference is noted to caution you from relying on this exception if you intend to write portable Java applications. Javadoc fails to distinguish class and package names that reside in the same directory and differ only in case.
An example is the package java. By default, a file initially created on an OpenVMS system, with a text editor for example, will have 'Variable length' record format. On OpenVMS, when you create a new version of an existing file, the new file will inherit the record format of the existing file.
The RTE allows you to specify a logical:. To get a binary file. If you try to run a Java application developed elsewhere on an OpenVMS system, you might encounter problems with file and directory names. These algorithms can be used in combinations. You can enable the use of each algorithm by binary investments java jar on a particular bit in the following logical name:. COM to establish these and other defaults.
The algorithms and the bit values to set them are summarized below. A more detailed explanation of each option follows the table. This is useful if you are experiencing problems with the way filenames are being mapped, perhaps resulting in unexpected "File not found" messages. Change names of the form xxx. In that case, we attempt to map the special meaning. Some Java binary investments java jar expect to be able to create a hidden file or directory.
The hidden character ". Multiple dots in the filename are turned into underscores, but the last dot is retained. Multiple dots binary investments java jar the filename are turned into underscores, but the first dot is retained. For filenames greater than 39 characters either to the left or the right of the single dot, that portion of the name is truncated on the right. There is support for representing a directory structure that is more than eight levels deep on an ODS-2 format disk.
If your application will use more than the OpenVMS maximum of eight nested directories, then define the following logicals to work around this restriction:. How many directory mappings exist?