Java 8 Lambda Map
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Java 8 Lambda Map
Function is a functional interface with a single method apply() which takes a single argument and returns a value. We have passed character and runnable arguments to map object and pass a lambda expression as the second argument in the put () method of map class. Founder of mkyong.com, love java.
Super v,k> keyfunction) returns a map with the given values, indexed by keys derived from those values. Foreach method takes biconsumer as argument and calls it's accept () method. In this blog, i am going to explain you about how to loop over a list and a map with the new java 8 features foreach and lambda expression.
We need to pass mapping function for key and value.
Java 8 stream map function can be used to perform some operation on all of it’s elements. The first one is replace (key, value), which replaces the existing value with the new one, blindly. We need to pass mapping function for key and value. In the below example, we can populate a map using a lambda expression.
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