Stack.java

Question 1

list all of the methods/ attributes of this class

Answer 1

*attributes list:
-private Object[] elements;
- private int size = 0;
-private static final int INICIAL_CAPACITY = 3
*public int getSize()
*public void push(Object e)
*public Object pop()
*public Boolean isEmpty()
*private void checkCapacity()
*public String toString($

Question 2

attributes list

Answer 2

-public Object[] elements;
-public int size = 0;
-public static final int INICIAL_CAPACITY = 3;

Question 3

constructor

Answer 3

Public StackA() {
elements =
new Object[INICIAL_CAPACITY];
}

Question 4

public int getSize()

Answer 4

return size;

Question 5

public void push(Object e)

Answer 5

checkCapacity();
elements[size++] = e;

Question 6

public Object pop()

Answer 6

if (size == 0) {
throw new EmptyStackException();
}
Object result = elements[- -size];
elements[size] = null;
return result;

Question 7

public Boolean isEmpty()

Answer 7

if(size == 0) {
return true;
}
else {
return false;
}

Question 8

public void checkCapacity()

Answer 8

if(elements.length == size) {
elements = Arrays.copyOf(elements, 2*size +1)
}

Question 9

public String toString()

Answer 9

String result = “ “;
for(int i = 0; i<size; i++) {
result += elements[i] + “ “;
return result;