Handle to Java Frame in C

Question

I would like to obtain the handle to a Java window......
jawt gives only the handle to a canvas.....
Please help me out.....This is urgent.......

Answer 1

Obtaining the handle to the canvas is, as you have found out, of little use to you.
However you can pass the (J)Frame object to your native code as part of some initialisation process and cache a GlobalRef to that object at the native side.
Once you have that global reference you can call any of the Frame methods you like. Don't forget, to make any Java call from the native side you need to get a valid JNIEnv, so you should either use (*jvm)->GetEnv.. method or jint result= (*jvm)->AttachCurrentThread...
In order to have a reference to the virtual machine, you need to add the following code to your native..
global reference
JavaVM *jvm;
then
JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM vm, void reserved) {
jvm = vm;
return JNI_VERSION_1_2;
}