How can we create an object. How can we Create Test class object?
Ans :- Test obj =new Test();
Category: Core Java
Difference between Vector and Arraylist in Java
In Java ArrayList and Vector classes both are implements List Interface, and both are using resizable and growable Array for internal data structure. Differences with respect to : Methods: Thread Safety: Performance: Legacy: Increment Size:
How to check Java Version By Using Command
Answer: Type cmd in Your Search Bar Then Press Enter and write this command. java hyphen version => java -version First write java hyphen version(java -version) then press enter. Now You can see which version you have installed Note: If …
ExecutorService in Java
The Java ExecutorService is an interface which is present inside java.util.concurrent package. The ExecutorService interface is a subinterface of the Executor interface. It allows us to execute tasks asynchronously on threads. It allows us to submit tasks for execution. With …
Understanding the equals() Method in Java.
In Java, the equals method present inside Object class, and it is used to compare the equality of two objects. If our class doesn’t contain .equals() method then Object class .equals() method will be executed which is always meant for …
Why HashMap does not support order
You A hash map, also known as a hash table, is a data structure that uses a hash function to map keys to indexes, allowing for efficient data retrieval. One of the reasons hash maps typically don’t maintain order is …
Q. What is primitive data types in java?
Ans :- Primitive data types are byte, short, int , long, float, double, character , Boolean