| Tags | generics array-manipulation |
| Hard Prerequisites | |
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Generic Java method takes a parameter and returns some value after performing a task. It is exactly like a normal function, however, a generic method has type parameters which are reproduced by actual type. This allows the generic method to be used in a more general way. The compiler takes care of the type of safety which enables programmers to code easily since they do not have to perform long, individual type castings.
Example
public static <T> int getPets(T[] list, T item) {}
Fun Time!!
You have two arrays, First array is of type Integers
12
324
6
7900
Second array is of type String
Please write a single function called:
printArrayContent(array);
This function should accept one parameter and be able to accept an integer array or string array and print out the contents of that array.
Notes: If you use method overload the answer wont be accepted
A generic class is implemented exactly like a non-generic class. The only difference is that it contains a type parameter section. There can be more than one type of parameter, separated by a comma. The classes, which accept one or more parameters, are known as parametrized classes or parameterized types.
Create a class called GenericClass that is able to set and get a private single variable which can either be String or Integer
stringInstance = new GenericClass<?>();
stringInstance.set("Test");
stringInstance.get() // print out Test
integerInstance = new GenericClass<?>();
integerInstance.set(1000);
integerInstance.get() // print out 1000