Ans:- the predefined classes from java.lang package which are used to make primitive data types available in the form of objects are known WrapperClasses. The following are the list of WrapperClasses:- Data Type WrapperClass Byte Byte(byte),Byte(String) Short Short(short),Short(String) Integer Integer(int),Integer(String) …
Ans :- the main difference between Collection and Collections :- 1.Collection<E> 2.Collections 1.Collection<E> => Collection <E> is an interface from java.util package and which is the root of Java Collection<E> Framework. 2.Collections : => “Collections” is a Class from java.util …
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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:
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 …