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stack_using_linklist.java

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class stack_using_linklist

{

private Node top;

private class Node {

int data;

Node next;

Node(int data) {

this.data = data;

}

}

public void push(int data) {

Node newNode = new Node(data);

newNode.next = top;

top = newNode;

}

public int pop() {

if (top == null) {

System.out.println("Stack is empty");

return -1;

}

int value = top.data;

top = top.next;

return value;

}

public int peek() {

if (top == null) {

return -1;

}

return top.data;

}

public boolean isEmpty() {

return top == null;

}

public static void main(String[] args) {

stack_using_linklist stack = new stack_using_linklist();

stack.push(50);

stack.push(100);

System.out.println("Popped: " + stack.pop());

System.out.println("Top element: " + stack.peek());

}

}