Can I learn java in 3 months?

0 Answers  

---

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's the purpose of static methods and static variables?

0 Answers  

---

What is the purpose of the strictfp keyword?

0 Answers  

---

Explain the difference between call by refrence and call by value?

0 Answers  

---

---

explain multi-threading in java?

0 Answers  

---

What happens if we don’t override run method ?

0 Answers  

---

When should a function throw an exception?

0 Answers   Thomson Reuters, Virtusa,

---

Explain different ways of passing arguments to sub-routine?

1 Answers  

---

C and C++ has constructors and distructors, why does Java does not have distructors?

1 Answers   T3 Softwares,

---

How does arraylist work in java?

0 Answers  

---

I have multiple constructors defined in a class. Is it possible to call a constructor from another constructor’s body?

0 Answers  

---