GIWS (software)

The following Java class does some simple computation.

package basic_example;

import java.lang.Math;

public class MyComplexClass{

public MyComplexClass(){

// the constructor

}

public long myVeryComplexComputation(double a, double b){

return Math.round(Math.cos(a)+Math.sin(b)*9);

}

}

GIWS gives the capability to call it from C++.

1. include
2. include "basic_example.hxx"
3. include

JavaVM* create_vm() {

JavaVM* jvm;

JNIEnv* env;

JavaVMInitArgs args;

JavaVMOption options[2];

args.version = JNI_VERSION_1_4;

args.nOptions = 2;

options[0].optionString = const_cast("-Djava.class.path=.");

options[1].optionString = const_cast("-Xcheck:jni");

args.options = options;

args.ignoreUnrecognized = JNI_FALSE;

JNI_CreateJavaVM(&jvm, (void **)&env, &args);

return jvm;

}

using namespace basic_example;

using namespace std;

int main(){

JavaVM* jvm = create_vm();

MyComplexClass *testOfMyClass = new MyComplexClass(jvm);

cout << "My Computation: " << testOfMyClass->myVeryComplexComputation(1.2,80) << endl;

return 0;

}

To generate the binding, GIWS uses a XML declaration. GIWS will generate the JNI code to call the Java object.

• SWIG allows one to call C or C++ from higher level languages

{{reflist}}

• {{Official website|https://github.com/opencollab/giws/}}

Category:Programming tools

Category:Cross-platform software

Category:Free computer programming tools

Category:Java platform

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