Java on HP-UX 11i Frequently Asked Questions

vm_args.minHeapSize = 32000000;

vm_args.maxHeapSize = 96000000;

vm_args.nativeStatckSize = 1000000;

vm_args.javaStackSize = 1000000;

vm_args.disableJIT = JNI_TRUE;

if (ret !=0)

printf("failed to GetDefaultJavaVMInitArgs/n");

//Note: If you have not set and exported the environment variable

//CLASSPATH you may also need to add this:

vm_args.classpath =.:/opt/java/lib/classes.zip:./ssjcls01.zip";

//load and initialize a JVM, return a JNI interface pointer in env

ret = JNI_CreateJavaVM(jvm env vm_args);

For more information and code examples, refer to the JNI chapter of the HP-UX Java

Programmer's Guide.

Q: I downloaded Java and got the error: "Unable to initialize threads -- cannot find class

java/lang/thread". What should I do?

A: For most users, the Java wrapper script will take care of setting the JAVA_HOME

environment variable and will add the appropriate entries to the CLASSPATH so that

the JVM finds the standard API classes.

The PATH environment variable needs to include a path to the Java wrapper script.

People writing applications with non-Java mains may need to worry about the setting

of CLASSPATH and SHLIB_PATH.

For more information, refer to the HP-UX Java Programmer's Guide.

Q: I'm trying to establish a bare socket connection from a client machine to a server

machine on another network through a firewall. How do I do this?

A: You have to use C or C++ routines and communicate with the JVM via JNI calls (Java

calling C or C++). For more information and code examples, refer to the JNI chapter of

the HP-UX Java Programmer's Guide.

Q: When I start swinstall and try to install the depot file, I get the message: "You do

not have the required permissions to perform this SD operation." How can this be, if I

am logged in as root?

A: You could try the following:

1. Kill the swagentd process.

2. Run the following command, and if the file swlock exists, rename the file:

ls /var/adm/sw/products/swlock

3. Kill the swinstall process (if swinstall is running).

4. Restart the swagentd process.