Interested to Buy Any Domain ? << Click Here >> for more details...
Why ArrayList class is not a synchronized class and why it
is not a thread safe class? explain
- 1 Answers
- 5065 Views
- I also Faced
- E-Mail Answers
Answer / atre sachin
If multiple threads access an ArrayList instance concurrently, and at least one of the threads modifies the list structurally, it must be synchronized externally. (A structural modification is any operation that adds or deletes one or more elements, or explicitly resizes the backing array; merely setting the value of an element is not a structural modification.)
| Is This Answer Correct ? | 2 Yes | 0 No |
What is string pool in java?
If I will write String s=new String("XYZ"); String s1=new String("XYZ"); if(s.equals(s1)){ sop("True"); } else{ sop("False"); } This program will give me "True". But When I am creating my own class suppose class Employee{ public Employee(String name); } Employee e= new Employee("XYZ"); Employee e1 = neew Employee("XYZ"); if(e.equals(e1)){ sop("True"); } else{ sop("False"); } Then it will give the output as "False". Can I know what is happening internally?
What is method reference in java?
Why can't we override private static methods?
Which of the classes will have more memory allocated?
What are the different types of inner classes?
When we should use serialization?
What is passing value java?
Does any tag exists in HTML to upload and download files ?
Is array passed by reference in java?
we r taking <load-on-startup>0</load-on-startup> <load-on-startup>1</load-on-startup> in deployment descripter for loading servlets like serv1 N serv2? so 'll it take serv1 or serv2
What is Major and importance difference between for and foreach loop ?
Core Java 
