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package java8.algorithemic; import java.util.HashMap; import java.util.Map; public class RomanToInteger { private static Map<Cha...

The most common and frequent exception which many Java developers encounter is NullPointerException.  Though this is very common exception a...

Java Function<T, R> is functional interface which accepts one type of argument and return a result. We can leverage java Function to w...

Let's consider the following POJO class. public class Dish { private String name; private Boolean vegitarian; private Integer calor...

Java lambda expression can be used to replace legacy anonymous class. For example, let's consider the following POJO class. public cla...