The Java Interview Handbook: 300+ Interview Questions/

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Raw Types

Raw Types

This lesson explains what raw types are.

We'll cover the following...
Technical Quiz
1.

Consider the Printer class below which is parametrized on type T.

public class Printer<T> {

    T item;

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

    public void consolePrinter() {
        System.out.println(item.toString());
    }

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

Will the following code snippet compile, if we don’t supply any type arguments? 

Printer printer = new Printer(5);
A.

Yes

B.

No

1 / 4

The snippet Printer printer = new Printer(5); will compile just fine. When the actual type parameter is omitted, a raw type is created. Raw types ...