CS计算机代考程序代写 public class LinkedStack implements Stack {

public class LinkedStack implements Stack {

private static class Elem {
private T value;
private Elem next;

private Elem(T value, Elem next) {
this.value = value;
this.next = next;
}
}

private Elem top;

public boolean isEmpty() {
return top == null;
}

public void push(E value) {
top = new Elem(value, top);
}

public E peek() {
return top.value;
}

public E pop() {
E saved = top.value;
top = top.next;
return saved;
}
}