Pjoshi : Jitendra Zaa is absolutly correct, although the m4 object not been added in the map, but m4 is the exact copy of m2 and m2 is getting used here as a KEY, so it will return m2 object value.
Please correct me if i am wrong.

So true. m4 is not added to map

In Object class .equals() method is used for reference comparison. In String class and all Wrapper classes, .equals() method is overridden for content comparison. in this example program m1 and m2 are two movie objects with different references though we are setting same values. if we don’t override .equals() method, then HashMap is comparing their references and treating them as unique keys.

You must note that object m2,m3 and m4 will have same hashcode (as implemented in example).
so when you are doing map.get(m4) internally it gets hashcode and based on hashcode it will get index of bucket .
and once he will have bucket based on .equals method it will fetch the value “Duplicate Tasvir” .

Hope you will get it.

line 50-68, all objects are inserted in map. Now to get value, we just need to create an object and that will act as key, so need to insert in map again.

Sorry but Can i know if you are not putting m4 object in map, How you are able to retrieve it.

for (Movie mm : map.keySet()) {

System.out.println(map.get(mm).toString());

}

Movie m4 = new Movie();

m4.setActor(“Akshay”);

m4.setName(“Taskvir”);

m4.setReleaseYr(2010);

if (map.get(m4) == null) {

System.out.println(“—————-“);

System.out.println(“Object not found”);

System.out.println(“—————-“);
} else {

System.out.println(“—————-“);

System.out.println(map.get(m4).toString());

System.out.println(“—————-“);

}

}

Output:

Khiladi

Duplicate Tasvir

ThankYou

—————-

Duplicate Tasvir // M4 object

—————-