Category: Java

This post will discuss how to check if a value exists in a Map in Java. A value value exists in the map if it contains at least one mapping to a value v for which Objects.equals(value, v) holds.

This post will discuss how to add values to a Map in Java.

This post will discuss how to calculate the sum of all values in a Map in Java.

This post will discuss how to build a Map from a List of keys and values in Java.

This post will discuss how to iterate over a Map in sorted order in Java.

This post will discuss how to remove a key from a Map in Java.

This post will discuss how to remove a key from a Map while iterating over it in Java.

This post will discuss how to convert a Map to a String in Java.

This post will discuss how to invert the mapping of a Map in Java. In order words, create a reverse map in Java.

This post will discuss how to merge two maps of the same type in Java. The solution returns a new map, containing all mappings in both maps. The merge operation will handle common keys present in both maps.

This post will discuss how to find the key(s) having the maximum value in a Map in Java.

This post will discuss how to apply a function to each entry of a Map in Java.