public T peek() {
if (topNode != null) {
return topNode.getValue();
}
return null;
}
void printStack() {
StackNode current;
current = start;
while (current != null) {
System.out.println("->" + current.getValue());
current = current.getNext();
}
}
public T findMax() {
StackNode<T> currentNode = topNode;
T max = topNode.getValue();
while (currentNode != null) {
T currentValue = currentNode.getValue();
if (currentValue > max) {
max = currentValue;
}
currentNode = currentNode.getLastNode();
}
return max;
}
public void print() {
StackNode<T> currentNode = topNode;
while (currentNode != null) {
System.out.println(currentNode.getValue());
currentNode = currentNode.getLastNode();
}
}
public T pop() {
if (topNode != null) {
StackNode newTopNode = topNode.getLastNode();
T topNodeValue = topNode.getValue();
newTopNode.setNextNode(null);
topNode.setLastNode(null);
topNode = newTopNode;
return topNodeValue;
}
return null;
}
public T findMin(T currentMin, T max) {
StackNode<T> currentNode = topNode;
T min = max;
while (currentNode != null) {
T currentValue = currentNode.getValue();
if (currentMin == null) {
if (currentValue < min) {
min = currentValue;
}
} else {
if (currentValue < min && currentValue > currentMin) {
min = currentValue;
}
}
currentNode = currentNode.getLastNode();
}
return min;
}
char peep() {
return start.getValue();
}