Jniexamples

This directory and its subdirectories contain the example code for:

The Java Native Interface: Programmer's Guide and Specification
Sheng Liang, Addison-Wesley, 1999

Each subdirectory contains the examples for the corresponding chapter. You can build and run all examples at once, or visit the subdirectories to build and run individual examples.

On Mac:

1. Type: make -f makefile.mac
2. To clean up all build targets, type: make -f makefile.mac clean

On Solaris:

1. In makeincludes.solaris, set the make variable JDK to point to your Java 2 SDK installation.
2. Type: make -f makefile.solaris
3. To clean up all build targets, type: make -f makefile.solaris clean

On Win32:

1. In makeincludes.win32, set the make variable JDK to point to your Java 2 SDK installation.
2. Type: nmake -f makefile.win32
3. To clean up all build targets, type: nmake -f makefile.win32 clean

README files in subdirectories list the page numbers where the example code is discussed in the book.

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A NOTE ON COMPILING THE EXAMPLES ON WIN32

You can also compile these examples by typing the commands as described in the book. However, the Win32 compiler command lines given on pages 16 and 87 of the book have an error. The error prevents the native library or native application from being linked against msvcrt.dll, the multithreaded C runtime library used by the virtual machine implementation in JDK 1.1 and Java 2 SDK 1.2.

On page 16, the correct command line for building the HelloWorld example should be:

cl -Ic:\jdk1.2.1\include -Ic:\jdk1.2.1\include\win32 -MD -LD HelloWorld.c -FeHelloWorld.dll

The original text in the book lacks the -MD option, causing the native library to link with the single threaded C runtime library statically, instead of linking against msvcrt.dll dynamically.

On page 87, the correct command line for building invoke.c with JDK 1.1 should be:

cl -Ic:\jdk1.1.8\include -Ic:\jdk1.1.8\include\win32 -MD invoke.c -link c:\jdk1.1.8\lib\javai.lib

The original text in the book incorrectly uses the -MT option instead of the -MD option, causing the native library to link with the multithreaded C runtime library statically, instead of linking against msvcrt.dll dynamically.