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Stack.java
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69 lines (54 loc) · 1.08 KB
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package stack;
public class Stack {
private Node top;
private int height;
public class Node {
int value;
Node next;
Node (int value) {
this.value = value;
}
}
public Stack (int value) {
Node newNode = new Node(value);
top = newNode;
height++;
}
public void printStack() {
if (top == null) {
System.out.println("Stack is empty");
return;
}
Node temp = top;
while (temp != null) {
System.out.println(temp.value + " -> ");
temp = temp.next;
}
}
public void getTop() {
System.out.println("Top = " + top.value);
}
public void getHeight() {
System.out.println("Height of the stack = " + height);
}
public void push(int value) {
Node newNode = new Node(value);
if (top == null) {
top = newNode;
}else {
newNode.next = top;
top = newNode;
}
height++;
}
public void pop() {
if (top == null) return;
if (height == 1) top = null;
else {
Node temp = top;
top = top.next;
temp.next = null;
}
height--;
}
}