CODEWITHSUNDEEP
javagenericsstack
natep
natep

Reputation: 126

How can I make these stacks generic?

I have the following simple method:

public static Stack transfer(Stack s) {  
    Stack t = new Stack();
    return t;
}

I intend to fill in more functionality, but I'd like to make this applicable to generic stacks:

Stack<E>

Where E is the generic type of the elements in the stack. I tried several ways to add the element to the Stack, but I seem to keep getting errors no matter how I have them set up. I know this is a basic question, but I've never really used stacks before and I just need pointed in the right direction.

The code is in Java, using Eclipse. Stacks are found in java.util.Stack

Upvotes: 0

Views: 63

Answers (2)

ifloop
ifloop

Reputation: 8386

You simply have to provide a type as type parameter to the already generic class Stack<T>

Stack<String> stringStack = new Stack<>();

Upvotes: 0

Konstantin Yovkov
Konstantin Yovkov

Reputation: 62884

The Stack class is already generic, but in order make the transfer method generic, you have to do:

public static <E> Stack<E> transfer(Stack<E> s) {  
    Stack<E> t = new Stack<E>();
    return t;
}

Upvotes: 3

Related Questions