Practice›Java Fundamentals›Module 9. Generics›9.1 Generic classes

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9.1 Generic classes — copy between boxes

Total: 0 / 3 pts

Practice mode — check each part and get hints as you go.

Task

Fill in the generic method copy so that it copies the item held in from into to. Both boxes hold the same type T.

The program prints src.

Your solution

class Box<T> {
    private T item;

    public Box(T item) {
        this.item = item;
    }

    public T get() {
        return item;
    }

    public void set(T item) {
        this.item = item;
    }
}

public class Main {

    public static <T> void copy(Box<T> from, Box<T> to) {
        // read from one box and store into the other

    }

    public static void main(String[] args) {
        Box<String> from = new Box<String>("src");
        Box<String> to = new Box<String>("dst");
        copy(from, to);
        System.out.println(to.get());
    }
}

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