The Java Native InterfaceProgrammer’s Guide and Specification phần 4 ppt

... scheduled. The thread models match if the native code uses the same thread model as the Java virtual machine implementation. If the Java virtual machine implementation uses native thread support, the native ... with the Java virtual machine. The launcher parses the command line arguments, loads the virtual machine, and runs Java applications through the i...

Ngày tải lên: 13/08/2014, 08:20

... Evolution of the JNI The need for Java applications to interoperate with native code has been recog- nized since the very early days of the Java platform. The first release of the Java platform, Java ... Because of the 1. As used herein, the phrases Java virtual machine” or Java VM” mean a virtual machine for the Java platform. Similarly, the phrase Java API”...

Ngày tải lên: 13/08/2014, 08:20

... ([Ljava/lang/String;)V private native nativeMethod ()V The -s flag informs javap to output JNI descriptor strings rather than types as they appear in the Java programming language. The -p flag causes javap to include ... prints out the existing value of the static field and then sets the field to a new value. To verify that the field has indeed changed, the pro- gram prints...

Ngày tải lên: 13/08/2014, 08:20

... callback from native code (a native /Java callback) compare with the cost of calling a native method (a Java/ native call), and with the cost of calling a regular method (a Java/ Java call)? The answer ... reference and the other for the result returned from the method call. Next, it obtains the class reference from the object and looks up the method ID. D...

Ngày tải lên: 13/08/2014, 08:20

... Application and Native Code A common question when designing a Java application supported by native code is “What, and how much, should be in native code?” The boundaries between the native code and the ... in the Java programming language than to inline native methods defined in C and C++. • Keep the code on the native code side minimal. There are compellin...

Ngày tải lên: 13/08/2014, 08:20

... characters, and so on, are copied between the Java virtual machine and native code. Objects, on the other hand, are passed jni.book Page 155 Thursday, February 21, 2002 4: 36 PM Simpo PDF Merge and Split ... the primitive and refer- ence types in the Java programming language. 12.1.1 Primitive Types The following table describes the primitive types in the Java p...

Ngày tải lên: 13/08/2014, 08:20

... are to be passed to the method immediately following the methodID argument. The Call<Type>Method function accepts these arguments and passes them to the method that the programmer wishes ... invoke the method based on the real class of the object, while CallNonvirtual<Type>MethodV routines invoke the method based on the class, designated by the clazz parame...

Ngày tải lên: 13/08/2014, 08:20

... for- mat. The function begins the translation at offset start and places the result in the given buffer buf. The str reference and buf buffer must not be NULL. Note that the len argument denotes the ... triggers the execution of this function. The JNI_OnLoad function returns the JNI version number required by the native library. If the native library does not e...

Ngày tải lên: 13/08/2014, 08:20

... 217 java. lang.String See String java. lang.Thread , 48 java. library.path property, 17, 150 Java/ Java call, 58 Java/ native call, 58 Java_ prefix, 22 Java_ VMInitArgs, 251 javac compiler, 11, 14 javah ... 3 Java Runtime Environment, 4 java runtime interpreter, 11, 83 Java virtual machine, 4 instance, 173 Java weak references API, 270 java. class.path property, 85 jav...

Ngày tải lên: 13/08/2014, 08:20

... Loops 5- 14 PL/SQL User’s Guide and Reference The sequence of statements inside the loop is executed once for each row that satisfies the query associated with the cursor. When you leave the loop, the ... debits the first account, then credits the second. In the example below, after crediting the second account, you issue a commit, which makes the changes permanent. O...

Ngày tải lên: 07/08/2014, 11:22