Answer Posted / rice

HashMap is a class that implements Map interface.

HashMap underlined data structure is Hash table.

If we want to describe the group of objects as key ,value
pairs then we go for HashMap class.

key are not duplicated but value can be any thing.

null insertion is possible.

insertion order is not preserved.

HashMap hm=new HashMap();
hm.put(1, "rice");
hm.put(3, "rice");
hm.put(2, "shine");
System.out.println(hm);

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