What is the Difference between Final Class && Abstract Class?

0 Answers   HCL,

---

Can a class have a static inner class?

0 Answers  

---

What is the difference between state-based unit testing and interaction-based unit testing?

0 Answers  

---

Is {a, n, d} a palindrome? If you are given a random string, is it a palindrome or not?

0 Answers   Amazon,

---

What is canonical name in java?

0 Answers  

---

How we create object in copy constructor?

0 Answers   HCL,

---

public class AboutStrings{ public static void main(String args[]){ String s1="hello"; String s2="hel"; String s3="lo"; String s4=s2+s3; //to know the hash codes of s1,s4. System.out.println(s1.hashCode()); System.out.println(s4.hashCode()); // these two s1 and s4 are having same hashcodes. if(s1==s4){ System.out.println("s1 and s4 are same."); }else System.out.println("s1 and s4 are not same."); } } Somebody told me that, == operator compares references of the objects. In the above example even though s1 and s4 are refering to same object(having same hash codes), it is printing s1 and s4 are not same. Can anybody explain in detail why it is behaving like this? Thanks in Advance RavuriVinod

4 Answers   TCS,

---

What do you mean by thread safe?

0 Answers  

---

Difference between serialization and deserialization in java?

0 Answers  

---

What are the types of sockets in java?

0 Answers  

---

What is the purpose of the wait(), notify(), and notifyall() methods in java programming?

0 Answers  

---

How many types of java are there?

0 Answers  

---