About return statement

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Hi there, Solving this task I found that in the Object Method there's no return type declaration and that puzzles me. Is it or is not compulsory declare the returning type in a Method?

public static Object createArrayList() {
       //write your code here
       List<String> arrayList = new ArrayList<>();
       return arrayList;
   }

In this piece of code, the Method Object returns an ArrayList, however is not declared in the Method. I guess that my premises are wrong but, am I? thanks

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Thomas

Level 41 , Bayreuth, Germany

26 January 2022, 12:46

Object is the return type. The methods name is createArrayList. The method creates an ArrayList, saves the reference to that ArrayList object in a variable of type List (that's an interface ArrayList implements, that's why you can upcast). Then they return the List (which is also an Object as every class in Java extends implicit Object) reference and implicit upcast it to Object (the return type).