c c using java native interface

... 10 Using The Java Native Interface www.cs.umanitoba.ca/~eclipse On the next screen, you select the project you wish to convert by checking its corresponding check box Choose the Java project ... create a Java project and then use the “Convert to C or C+ + Project” facility to add the CDT’s C/ C++ project functionality to it Then whenever we save our code, both the Java and C code will be compiled ... to create a Java file that will call our native C code Create a Java file called Hello .java with the following contents: //File: Hello .java class Hello { public native void sayHello(); static...

Ngày tải lên: 10/03/2015, 10:56

... inter-process communication (IPC) mechanisms • A Java application may connect to a legacy database through the JDBC™ API • A Java application may take advantage of distributed object technologies such ... source file using the javac compiler that comes with the JDK or Java SDK release: javac HelloWorld .java This command will generate a HelloWorld.class file in the current directory 2.4 Create the Native ... to combine Java applications with native code As a two-way interface, the JNI can support two types of native code: native libraries and native applications • You can use the JNI to write native...

Ngày tải lên: 27/06/2014, 08:20

... inter-process communication (IPC) mechanisms • A Java application may connect to a legacy database through the JDBC™ API • A Java application may take advantage of distributed object technologies such ... source file using the javac compiler that comes with the JDK or Java SDK release: javac HelloWorld .java This command will generate a HelloWorld.class file in the current directory 2.4 Create the Native ... to combine Java applications with native code As a two-way interface, the JNI can support two types of native code: native libraries and native applications • You can use the JNI to write native...

Ngày tải lên: 13/08/2014, 08:20

... more efficient by using a simple but effective caching technique In the last section, we will discuss the performance characteristics of calling native methods as well as accessing fields and calling ... StaticFieldAccess c = new StaticFieldAccess(); StaticFieldAccess.si = 100; c. accessField(); System.out.println("In Java: "); System.out.println(" StaticFieldAccess.si = " + si); } static { System.loadLibrary("StaticFieldAccess"); ... System.loadLibrary("StaticFieldAccess"); } } The StaticFieldAccess class contains a static integer field si The StaticFieldAccess.main method creates an object, initializes the static field, and then calls the native...

Ngày tải lên: 13/08/2014, 08:20

... the native library produces the following output: java. lang.NullPointerException: at CatchThrow.callback(CatchThrow .java) at CatchThrow.doit (Native Method) at CatchThrow.main(CatchThrow .java) ... we call ExceptionCheck to check for pending exceptions The ExceptionCheck function is new in Java SDK release 1.2 It is similar to the ExceptionOccurred function The difference is that ExceptionCheck ... similar to a Java/ native call In theory, the overhead of native /Java callbacks could also be within two to three times of Java/ Java calls In practice, however, native /Java callbacks are relatively...

Ngày tải lên: 13/08/2014, 08:20

... defined using the CFunction class The CFunction class internally implements a shared stub The static variable C. c_atol stores a CFunction object that corresponds to the C function atol in the msvcrt.dll ... instances of one class can be used when instances of another class are expected • GetObjectClass returns the class of a given jobject reference • IsInstanceOf checks whether a jobject reference ... jobject subtypes: // JNI reference types defined in C+ + class _jobject {}; class _jclass : public _jobject {}; class _jstring : public _jobject {}; typedef _jobject* jobject; typedef _jclass* jclass;...

Ngày tải lên: 13/08/2014, 08:20

... instance of the CMalloc class memory in the C heap Classes that directly correspond to native data structures, such as CPointer and CMalloc, are called peer classes You can construct peer classes ... EXISTING NATIVE LIBRARIES The CFunction Class 9.4.3 public native int callInt(Object[] args); } The CFunction class declares a private field conv used to store the calling convention of the C function ... copyIn native methods for other array types in the CPointer class 9.4.2 The CMalloc Class The CMalloc class adds two native methods used to allocate and free C memory blocks: public class CMalloc...

Ngày tải lên: 13/08/2014, 08:20

... jobject self) { static jclass cachedFooClass; /* cached class Foo */ if (cachedFooClass == NULL) { jclass fooClass = (*env)->FindClass(env, "Foo"); if (fooClass == NULL) { return; /* error */ } cachedFooClass ... uses ExceptionOccurred to check for synchronous and asynchronous exceptions explicitly Only those JNI functions that could potentially raise synchronous exceptions check for asynchronous exceptions ... Exceptions • Throw and ThrowNew raise an exception in the current thread • ExceptionOccurred and ExceptionCheck check for pending exceptions in the current thread ExceptionCheck is new in Java...

Ngày tải lên: 13/08/2014, 08:20

... CallStaticObjectMethod 114 CallStaticBooleanMethod 120 CallStaticCharMethod 123 CallStaticShortMethod 126 CallStaticIntMethod 129 CallStaticLongMethod 132 CallStaticFloatMethod 135 CallStaticDoubleMethod ... CallStaticMethodV CallStaticVoidMethodV void CallStaticObjectMethodV jobject CallStaticBooleanMethodV jboolean CallStaticByteMethodV jbyte CallStaticCharMethodV jchar CallStaticShortMethodV jshort CallStaticIntMethodV ... functions consists of ten members CallStaticMethodA CallStaticVoidMethodA void CallStaticObjectMethodA jobject CallStaticBooleanMethodA jboolean CallStaticByteMethodA jbyte CallStaticCharMethodA...

Ngày tải lên: 13/08/2014, 08:20

... whether an object of class or interface clazz1 can be safely cast to class or interface clazz2 Both clazz1 and clazz2 must not be NULL Linkage Index 11 in the JNIEnv interface function table Parameters ... NewObject JNI FUNCTIONS NewObject Prototype jobject NewObject(JNIEnv *env, jclass clazz, jmethodID methodID, ); Description Constructs a new object The method ID indicates which constructor method ... given class If clazz represents any class other than the class java. lang.Object, then this function returns a reference to the superclass of the class specified by clazz If clazz represents the class...

Ngày tải lên: 13/08/2014, 08:20

... 166, 167 Java SDK, Java API See Java Application Programming Interface Java application, See also native application Java Application Programming Interface, Java Core Reflection API, 161 Java Development ... 198 CallStaticVoidMethodV, 200 CallVoidMethod, 47, 184 CallVoidMethodA, 186 CallVoidMethodV, 188 CatchThrow example, 73 CallStaticMethodA, cc See Solaris C compiler CFunction class callInt ... CallStaticObjectMethod, 196 CallStaticObjectMethodA, 198 CallStaticObjectMethodV, 200 CallStaticShortMethod, 196 CallStaticShortMethodA, 198 CallStaticShortMethodV, 200 CallStaticVoidMethod, 49, 196 CallStaticVoidMethodA,...

Ngày tải lên: 13/08/2014, 08:20

... aI22 3C ⁄ cV5 8C aI22 3C ⁄ cL5 9C aN23 0C ⁄ cS6 6C aN23 0C ⁄ cT6 7C aN23 0C ⁄ cG6 8C aN23 0C ⁄ cI6 9C aN23 0C ⁄ cY7 0C aA23 3C ⁄ cI6 9C aA23 3C ⁄ cY7 0C aI23 7C ⁄ cV7 3C aG23 9C ⁄ cL7 6C aG23 9C ⁄ cI7 7C aL24 0C ⁄ cL7 6C ... aA23 3C ⁄ cI6 9C aA23 3C ⁄ cY7 0C aI23 7C ⁄ cV7 3C aG23 9C ⁄ cL7 6C aG23 9C ⁄ cI7 7C aL24 0C ⁄ cL7 6C aL24 0C ⁄ cI7 7C aL24 1C ⁄ cL7 6C aL24 1C ⁄ cI7 7C aL20 7C ⁄ cF5 4C aL20 7C ⁄ cI5 5C aN21 4C ⁄ cA6 2C aN21 4C ⁄ cI6 3C aN21 4C ... cI6 3C aN21 4C ⁄ cP6 4C aN21 4C ⁄ cM6 5C aN21 4C ⁄ cI6 6C aA21 7C ⁄ cM6 5C aA21 7C ⁄ cI6 6C aI22 1C ⁄ cG6 9C aI22 3C ⁄ cL7 2C aI22 3C ⁄ cY7 3C aL22 4C ⁄ cL7 2C aL22 4C ⁄ cY7 3C aI22 5C ⁄ cL7 2C aI22 5C ⁄ cY7 3C ++++ +++...

Ngày tải lên: 16/03/2014, 06:20

... (A, B, Ci) = (A & B) | (A & Ci) | (B & Ci) B1 Ci A A2 Ci FA S1 Co S = A ^ B ^ Ci B2 Ci FA S2 Co B A3 Ci A B Ci Ci FA A[3:0] S Co B[3:0] B3 Co S[3:0] Co Co Full Adder S3 Co Ci + Ci FA Co 4-bit ... shortcuts that reduce design time for complex circuits One method for building complex combinational circuits quickly is to use combinational building blocks The following sections describe some commonly ... which is required by EE, CPE, CS, and SE majors Introduction to microprocessors (this book), which is required for EE, CPE, CS, and SE majors Computer architecture as represented by the topic coverage...

Ngày tải lên: 23/03/2014, 00:20

... I put the documentation comments into my source Java has Javadoc C# doesn’t C# has a commenting system which is very similar, where you put keys into the source code which are picked up and used ... The class containing this line of code also contains a method called CloseHit: private void CloseHit (object sender, System.ComponentModel.CancelEventArgs e) { if (AuthorCompletedOK) { e.Cancel=false; ... verification: CheckResult MyCheckMethod; // assign MyCheckMethod to the desired method DoStuffThatNeedsACheckMethod (MyCheckMethod); You can have lots of method calls attached to a single delegate You can...

Ngày tải lên: 28/06/2014, 14:20

... SDK Cocoa Touch Media Core Services Core OS Media Core Animation Open GL ES Core Graphics Core Audio iPhone SDK Cocoa Touch Media Core Services Core OS iPhone SDK Cocoa Touch Media Core Services ... About Objects, Inc All rights reserved worldwide 18 iPhone SDK Cocoa Touch Media Core Services Core OS iPhone SDK Cocoa Touch Media Core Services Core OS Core Services Core Foundation C Library ... Manages certificates, public/private keys, etc SQLite C Library Accessing lightweight SQL database XML Support ObjC Class NSXMLParser class 20 iPhone SDK Cocoa Touch Media Core Services Core OS...

Ngày tải lên: 21/07/2014, 23:36

... implementation, create interfaces Species, BodyCharacteristics, Diet, Reproduction, and Domestication Declare the following methods in these interfaces: Species a African b Asian BodyCharacteristics a Trunk ... use the concepts of abstract classes and develop a program which will help the core team of Blueprint Garments to the presentation and audit successfully Using the concepts of abstract classes ... yourself to be a computer science student and develop the front end with the given back end details for the above scenario Using the concepts of multiple interfaces with inheritance and their implementation,...

Ngày tải lên: 02/08/2014, 10:20

... best calculated from routine clinical practice, rather than the clinical trial scenario, since these are the conditions in which most patients are treated and where there is usually much lower compliance ... haplotypes are indicated in blue Screenshot taken from UCSC draft human genome [28] Table Demographic characteristics of chronic hepatitis C patients after therapy Demographic factorsa Gender Mean ... P-VALUE -4 ORB (95% CI) ATTGATCCTCTG rs8109886 43.2 48.4 39.6 4.00 × 10 GCCAGCTGTAGA rs8099917/rs7248668 23.8 16.5 30.4 9.51 × 10-11 2.20 (1.72-2.80) GCTAGCTCCATG ATTGATCCTATG rs10853727 10.3...

Ngày tải lên: 11/08/2014, 12:21

... modules:  a.o gcc c b .c  b.o gcc c a .c gcc –o hello a.o b.o  Using math library  gcc –o calc calc .c -lm Oct 23, 2014 Advanced 29 Error reporting in gcc  Multiple sources     preprocessor: ... executed by OS and hardware Oct 23, 2014 Advanced 25 Executing C programs x.pl results perl data x .java javac java args x .c, x.cc Oct 23, 2014 gcc, g++ Advanced a.out 26 The C compiler gcc  gcc ... -p insert profiling code -l library -E preprocessor output only Oct 23, 2014 Advanced 28 Using gcc  Two-stage compilation  pre-process & compile: gcc c hello .c  link: gcc –o hello hello.o...

Ngày tải lên: 23/10/2014, 13:56

... NoMoreWaterException; } public int registerCallback( CoolerCallback coolerCallback ) { callbacks.addItem(coolerCallback); } public void unregisterCallback( int callbackID ) { callbacks.removeItemAt(callbackID); ... getColdWater(); // public method for the callback long registerCallback (in CoolerCallback coolerCB); void unregisterCallback (in long callbackID); }; Notice how the registerCallback function contains ... x++) { // get the callback object CoolerCallback cb = (CoolerCallback) callbacks.itemAt(x); // invoke on the callback object cb.waterLevelChanged( hotWaterLevel, warmWaterLevel, coldWaterLevel);...

Ngày tải lên: 29/09/2013, 08:20

... to control JavaScript from Java code This control is accomplished primarily through the Java netscape.javascript.JSObject class, which represents a JavaScript object within a Java program The JavaScript-to -Java ... JavaObject Class The JavaObject class is a JavaScript data type that represents a Java object The JavaObject class is, in many ways, analogous to the JavaClass class As with JavaClass, a JavaObject ... the JavaPackage Packages .java contains the JavaPackage Packages .java. awt For convenience, every Window object also has java, sun, and netscape properties that are shortcuts to Packages .java, Packages.sun,...

Ngày tải lên: 05/10/2013, 13:20