Chapter 2. Java Native Interface

In this chapter, we will cover the following recipes:

• Loading native libraries and registering native methods

• Passing parameters and receiving returns in primitive types

• Manipulating strings in JNI

• Managing references in JNI

• Manipulating classes in JNI

• Manipulating objects in JNI

• Manipulating arrays in JNI

• Accessing Java static and instance fields in native code

• Calling static and instance methods from native code

• Caching jfieldID, jmethodID, and reference data to improve performance

• Checking errors and handling exceptions in JNI

• Integrating assembly code in JNI