source code finalize method

package funds;

public class FinalizeDemo {
    public static void main(String arg[])
    {
        String s=new String("java");
        s=null;
        System.gc();   //here string class finalize called
        FinalizeDemo fd=new FinalizeDemo();
        fd=null;
        System.gc();  // this class finalize called
    }
    public void finalize()
    {
        System.out.println("finalize called");
    }
}

output:
finalize called