Answer Posted / raju kumar (bca)

ex:-class System
{
static printstream out= new printstream();
static Inputstream in= new Inputstream();
}
conclusion:=>
"system" is a class&packege(java.lang).
"out" is a static object of printstream class (java.io).
and "println()"is a method of out calss.

What are the different collection views provided by maps?

573

---

Explain static nested classes ?

599

---

How use .contains in java?

626

---

Explain all java features with real time examples

1212

---

What is the main use of generics in java?

512

---

---

Why static functions are used?

573

---

How to optimize the javac output?

602

---

Can we force the garbage collection to run?

540

---

What are aggregate functions explain with examples?

528

---

Is string a datatype?

558

---

Why does java does not support multiple inheritance? Explain

552

---

Is string serializable in java?

549

---

What are wrapped classes in java programming?

591

---

Explain try and catch keywords in java?

625

---

Why wait(),notify(),notifyAll() methods defined in Object class althought we are using in only threads.

2377

---