Problem Statement: Write a program to print consecutive occurrences of each character in a given string.
Test case 1:
Input : affffssdaaag
Test case 2:
Test case 3:
Output: a3 Read the rest of this entry »
Anonymous inner classes are used by java programmer as “ad hoc” functionality i.e where and when they are needed. Since Java 8, we can use lambda expressions instead of anonymous inner classes. It might seems that both inner classes and lambda expressions are similar as they both are used to implement ad hoc functionality. However there are some differences between lambda expression and inner classes which are as follow. Read the rest of this entry »
ConcurrentHashMap was introduce with JDK1.5 release to replace legacy class Hashtable. In multithreaded environment ConcurrentHashMap performs better as compared to Hashtable and Synchronized Map as well. All methods of Hashtable are synchronized which makes them quite slow due to contention if a number of thread increases. While ConcurrentHashMap is specially designed for concurrent uses which by default allows 16 threads to simultaneously read and write from map without any external synchronization. Read the rest of this entry »