Java 8 Map compute methods with code samples
In this article, I will be covering the Java 8 Map compute methods.Java 8 has introduced the Map.compute, Map.computeIfPresent example, and Map.computeIfAbsent methods. Edit compute The compute method computes a new value for a particular key and updates the Map with the new value. Even if the specified key is not present in the map, it computes the value for the key and adds the key-value mapping to the Map . The following code demonstrates this: Map <Integer,String> students = new HashMap<Integer,String>();students.put(100, "Swati Shashtri");students.put(101, "Gina George");students.put(102, "Puja Khanna"); students.compute(100, (key,value) -> value+",Pune");System.out.println(students.get(100));students.compute(101, (key,value) -> value+",Bangalore");System.out.println(students.get(101)); Here, there is a Map that has a student id as the key and student name as the value. There are 3 entries in the Map...