Java / Collections / Generics - https://www.minte9.com/java/collections-generics-1197

generics.java

/**
 * This code will throw an Exception Error
 * Correct the error line
 */
class App {

    public static void main(String[] args) {
        
        /**
         * SOLUTION
         */
        Box<Integer> box = new Box<Integer>();
        
        box.set(10);
        System.out.println(box.get()); // 10
    }

    static class Box<T> {

        private T t;
        public void set(T t) { this.t = t; }
        public T get() { return t; }
    }
}