Explain listiterator and methods in listiterator?

0 Answers  

---

what is the difference between future and callable interface in java?

0 Answers  

---

What is threaded programming and when is it used? : Java thread

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,

---

Without creating a new object, How you can retrieve a String or other object?

1 Answers  

---

what is difference between equals and ==?

0 Answers  

---

When should I use singleton?

0 Answers  

---

What is a methodologist?

0 Answers  

---

What is a copy constructor in java?

0 Answers   Amazon,

---

How do you sort a set in java?

0 Answers  

---

why java does not support multiple inheritance

41 Answers   Diamond, Euclid, Evergent, KLKJ, Mind Tree, NIIT, SSI Small Scale Industries, Wipro,

---

Can inner class final?

0 Answers  

---