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Java Native Interface Specification
May 16, 1997
Contents
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1. Introduction
- Java Native Interface Overview
- Background
- JDK 1.0 Native Method Interface
- Java Runtime Interface
- Raw Native Interface and Java/COM Interface
- Objectives
- Java Native Interface Approach
- Programming to the JNI
- Changes in JDK 1.1.2
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2. Design Overview
- JNI Interface Functions and Pointers
- Loading and Linking Native Methods
- Resolving Native Method Names
- Native Method Arguments
- Referencing Java Objects
- Global and Local References
- Implementing Local References
- Accessing Java Objects
- Accessing Primitive Arrays
- Accessing Fields and Methods
- Reporting Programming Errors
- Java Exceptions
- Exceptions and Error Codes
- Asynchronous Exceptions
- Exception Handling
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3. JNI Types and Data Structures
- Primitive Types
- Reference Types
- Field and Method IDs
- The Value Type
- Type Signatures
- UTF-8 Strings
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4. JNI Functions
- Interface Function Table
- Version Information
- GetVersion
- Class Operations
- DefineClass
- FindClass
- GetSuperclass
- IsAssignableFrom
- Exceptions
- Throw
- ThrowNew
- ExceptionOccurred
- ExceptionDescribe
- ExceptionClear
- FatalError
- Global and Local References
- NewGlobalRef
- DeleteGlobalRef
- DeleteLocalRef
- Object Operations
- AllocObject
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- GetObjectClass
- IsInstanceOf
- IsSameObject
- Accessing Fields of Objects
- GetFieldID
- Get<type>Field Routines
- Set<type>Field Routines
- Calling Instance Methods
- GetMethodID
- Call<type>Method
- CallNonvirtual<type>Method
- Accessing Static Fields
- GetStaticFieldID
- GetStatic<type>Field Routines
- SetStatic<type>Field Routines
- Calling Static Methods
- GetStaticMethodID
- CallStatic<type>Method
- String Operations
- NewString
- GetStringLength
- GetStringChars
- ReleaseStringChars
- NewStringUTF
- GetStringUTFLength
- GetStringUTFChars
- ReleaseStringUTFChars
- Array Operations
- GetArrayLength
- NewObjectArray
- GetObjectArrayElement
- SetObjectArrayElement
- New<PrimitiveType>Array Routines
- Get<PrimitiveType>ArrayElements Routines
- Release<PrimitiveType>ArrayElements Routines
- Get<PrimitiveType>ArrayRegion Routines
- Set<PrimitiveType>ArrayRegion Routines
- Registering Native Methods
- RegisterNatives
- UnregisterNatives
- Monitor Operations
- MonitorEnter
- MonitorExit
- Java VM Interface
- GetJavaVM
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5. The Invocation API
- Overview
- Creating the VM
- Attaching to the VM
- Unloading the VM
- Initialization Structures
- Invocation API Functions
- JNI_GetDefaultJavaVMInitArgs
- JNI_GetCreatedJavaVMs
- JNI_CreateJavaVM
- DestroyJavaVM
- AttachCurrentThread
- DetachCurrentThread
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Java Native Interface Specification (HTML generated by dkramer on March 15, 1997)
Copyright © 1996, 1997 Sun Microsystems, Inc.
All rights reserved
Please send any comments or corrections to jni@java.sun.com