Java Language Add an element

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Example

  1. Addition
Map<Integer, String> map = new HashMap<>();
map.put(1, "First element."); 
System.out.println(map.get(1));

Output: First element.

  1. Override
Map<Integer, String> map = new HashMap<>();
map.put(1, "First element.");
map.put(1, "New element.");
System.out.println(map.get(1));

Output: New element.

HashMap is used as an example. Other implementations that implement the Map interface may be used as well.

Add multiple items