Name: joT67522			Date: 11/18/97


In a C program, I am using the following code:

/* Create and load a JVM */
jint create_jvm (JavaVM **p_vm, JNIEnv **p_env, JDK1_1InitArgs *vm_args, char *class_path) {
  jint err;
  vm_args->classpath = class_path;
  err = JNI_CreateJavaVM (p_vm, p_env, vm_args);
  return (err);
}

/* Destroy a JVM */

jint destroy_jvm (JavaVM **jvm) {
	jint err;
	err = (**jvm)->DestroyJavaVM (*jvm);
	return (err);
}

The creation procedure work well. I can then create instances of classes and manipulate them.
But the destroy_jvm returns always -1.

If this can help, I am using JDK 1.1.4 on win 95.
Needless to add that it is quite urgent for me to fix this problem. So I would really appreciate a fast but complete answer.

Thank you for your answer

-------------------------------------Also from a duplicate entry------------------------

jint destroy_jvm (JavaVM **jvm) {
        jint err;
        err = (**jvm)->DestroyJavaVM (*jvm);
        return (err);
}

It always returns -1. Do I use the function 'DestroyJavaVM' in a bad way?
This procedure is called with a JavaVM created successfully before and with which I an able to create 
and manipulate instances of the following class.

class test_java {

	test_java () {
		System.out.println ("Constructor called");
		str_attr = "Hello from Java";
		int_attr = 43;
		me = this;
		static_byte = 1;
		attr_class = new attr_class_test ();
	}


	public test_java me;
	
	public attr_class_test attr_class;

	public String str_attr;

	public void set_str_attr (String str) {
		str_attr = str;
	}

    // static field

    public static byte static_byte;

	//  <type> routines

	public int int_routine () {
		System.out.println ("Called int_routine");
		return (42);
	}

	public short short_routine () {
		System.out.println ("Called short_routine");
		return (43);
	}
	
	public char char_routine () {
		System.out.println ("Called char_routine");
		return 'f';
	}

	public boolean boolean_routine () {
		System.out.println ("Called boolean_routine");
		return false;
	}

	public void void_routine () { 
		System.out.println ("Called void_routine baby");
	}

	public float float_routine () {
		float f = (float)42.01; 
		System.out.println ("Called float_routine");
		return f;
	}

	public double double_routine () {
		double d = 4.200001;
		System.out.println ("Called double routine =  " + d );
		return d;
	}

	public double double_pass_routine (double d) {
		System.out.println("Called passer =  " + d);
		return d;			
	}

	public static char multi_arg_routine (double d, int i, String s, short t, char c) {
		System.out.println("a double = " + d + "\nan int " + i + "\na String" + s +
			 "\na short " + t + "\na char " + c + "\n That was fun...");
		return '?';
	}

	public static void print_array (char[] c) {
		int finish = c.length;
		System.out.println("In pary");
		for (int i = 0; i < finish; i++)
			System.out.print(c[i] +", ");
		System.out.println (";");
	}

	// end of <temp> routine stuff

	public int int_attr;

	public void set_int_attr (int newint) {
		int_attr = newint;
	}

	public void one_arg (String s) {
		System.out.println ("Received argument: " + s);
	}
	
	public void junk () {
		String s = "andcedef";
		System.out.println ("junk: String is: " + s);
	}


	public static void root () {
		System.out.println ("root routine called");
		test_java t = new test_java ();
		t.junk ();
	}

	public static void main (String argv[]) {
		System.out.println ("Started from command line");
		root ();
	}
}

The sooner I receive your answer, the better!

Best Regards

Guillaume Wong-So
(Review ID: 20363)
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