How to find the number of objects in the heap

Question

How can I find the number of live objects on the heap in Java program?

Answer 1

class Test1
{
    static int count=0;

    public Test1()
    {
        count++;
        System.out.println("Total Objects"+" "+count);
    }
}

public class CountTotalNumberOfObjects 
{

    public static void main(String[] args) 
    {
        Test1 t = new Test1();
        Test1 t1 = new Test1();
        Test1 t3 = new Test1();
        Test1 t11 = new Test1();
        Test1 t111 = new Test1();
        Test1 t13 = new Test1();

    }

}