Which of the following is not an implicit object in JSP?

What does 'JPA' stand for?

What is the output of the following Java code?

System.out.print(Math.floor(-12.2));

LinkedList() method is used to 

class A 

{

public static void main(String args[])

{

int a = 42;

int b = ~a;

System.out.print(a + " " + b);  

} 

}

class test {

public static void main (String[] args) {

  double a=25.645;

  double b=25.0;

  a=a%10;

  b=b%10;

  System.out.println((int)a+" "+b);

}

}

public class Main

{  

public static void main(String[] args) {

float a = 90.0f;

String temp = Integer.toString(a);

System.out.println(temp);

}

}

class test{

public static void main (String[] args) {

   int a=10,b=20;

   for(int i=0;a==b;i++)

   {

       System.out.println("Hello");

   }

   System.out.println("World");

}

}

Number of threads in below java program is

public class ThreadExtended extends Thread {

public void run() {
System.out.println("\nThread is running now\n");
}

public static void main(String[] args) {

ThreadExtended threadE = new ThreadExtended();

threadE.start();
}
}

import java.util.*;

    class result 

    {

        public static void main(String args[]) 

        {

            Hashtable obj = new Hashtable();

            obj.put("A", new Integer(3));

            obj.put("A", new Integer(3));

            obj.put("B", new Integer(2));

            obj.put("B", new Integer(2));

            obj.put("C", new Integer(8));

            obj.put("C", new Integer(8));

            obj.put("D", new Integer(9));

            obj.put("D", new Integer(9));

            obj.put("E", new Integer(4));

            obj.put("E", new Integer(4));

            obj.put("F", new Integer(6));

            obj.put("F", new Integer(6));

            System.out.print(obj.contains(new Integer(6)));

        }

    }