Java JNI入门教程

本文详细介绍了Java Native Interface (JNI),包括其历史背景、设计概述、类型和数据结构、核心函数以及JNI在JDK不同版本中的变化。内容涵盖如何编译、加载和链接本地方法,如何处理Java对象、异常和错误,以及如何实现本地引用。此外,还讨论了JNI在Java对象操作、字段和方法访问、字符串和数组操作等方面的功能。

Java Native Interface Specification—Contents

Contents | Previous | Next


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

2. Design Overview

JNI Interface Functions and Pointers
Compiling, 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

3. JNI Types and Data Structures

Primitive Types
Reference Types
Field and Method IDs
The Value Type
Type Signatures
Modified UTF-8 Strings

4. JNI Functions

Interface Function Table
Version Information

GetVersion

Class Operations

DefineClass
FindClass
GetSuperclass
IsAssignableFrom

Exceptions

Throw
ThrowNew
ExceptionOccurred
ExceptionDescribe
ExceptionClear
FatalError
ExceptionCheck

Global and Local References

NewGlobalRef
DeleteGlobalRef
DeleteLocalRef
EnsureLocalCapacity
PushLocalFrame
PopLocalFrame
NewLocalRef

Weak Global References

NewWeakGlobalRef
DeleteWeakGlobalRef

Object Operations

AllocObject
NewObject, NewObjectA, and NewObjectV
GetObjectClass
GetObjectRefType
IsInstanceOf
IsSameObject

Accessing Fields of Objects

GetFieldID
Get<type>Field Routines
Set<type>Field Routines

Calling Instance Methods

GetMethodID
Call<type>Method Routines, Call<type>MethodA Routines, and Call<type>MethodV Routines
CallNonvirtual<type>Method Routines, CallNonvirtual<type>MethodA Routines, and CallNonvirtual<type>MethodV Routines

Accessing Static Fields

GetStaticFieldID
GetStatic<type>Field Routines
SetStatic<type>Field Routines

Calling Static Methods

GetStaticMethodID
CallStatic<type>Method Routines, CallStatic<type>MethodA Routines, and CallStatic<type>MethodV Routines

String Operations

NewString
GetStringLength
GetStringChars
ReleaseStringChars
NewStringUTF
GetStringUTFLength
GetStringUTFChars
ReleaseStringUTFChars
GetStringRegion
GetStringUTFRegion
GetStringCritical
Release StringCritical

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
GetPrimitiveArrayCritical
ReleasePrimitiveArrayCritical

Registering Native Methods

RegisterNatives
UnregisterNatives

Monitor Operations

MonitorEnter
MonitorExit

NIO Support

NewDirectByteBuffer
GetDirectBufferAddress
GetDirectBufferCapacity

Reflection Support

FromReflectedMethod
FromReflectedField
ToReflectedMethod
ToReflectedField

Java VM Interface

GetJavaVM

5. The Invocation API

Overview

Creating the VM
Attaching to the VM
Unloading the VM

Library and Version Management

JNI_OnLoad
JNI_OnUnload

Invocation API Functions

JNI_GetDefaultJavaVMInitArgs
JNI_GetCreatedJavaVMs
JNI_CreateJavaVM
DestroyJavaVM
AttachCurrentThread
AttachCurrentThreadAsDaemon
DetachCurrentThread
GetEnv

 


Contents | Previous | Next

 

https://docs.oracle.com/javase/7/docs/technotes/guides/jni/spec/jniTOC.html

>>java jni入门教程:https://blog.youkuaiyun.com/si444555666777/article/details/82191386

评论
成就一亿技术人!
拼手气红包6.0元
还能输入1000个字符
 
红包 添加红包
表情包 插入表情
 条评论被折叠 查看
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值