Java stack using linked list

class StackUsingLinkedlist {
              private class Node {
                int data;
                Node next;
              }
            
              Node top;
            
              StackUsingLinkedlist() {
                this.top = null;
              }

            public void push(int data) {
              Node newNode = new Node();
              newNode.data = data;
              newNode.next = top;
              top = newNode;
            }
            
            public boolean isEmpty() {
              return top == null;
            }
            
            public int peek() {
              if (!isEmpty()) {
                return top.data;
              } else {
                System.out.println("Stack is empty");
                return -1;
              }
            }
            
            public void pop() {
              if (top == null) {
                System.out.print("\nStack empty");
                return;
              }
              top = top.next;
            }
            
            public void display() {
              if (top == null) {
                System.out.print("\nStack empty");
                exit(1);
              } else {
                Node node = top;
                while (node != null) {
                  System.out.printf("%d->", node.data);
                  node = node.next;
                }
              }
            }

Similar codes

1 vote368 views1 answer
Jdk path ubuntu
Java
0 vote303 views1 answer
Java filter list based on unique value
Java
12 votes359 views1 answer
Android manifest cleartext traffic permitted
Java
0 vote290 views1 answer
Convert hashset to arraylist
Java
1 vote364 views1 answer
How to check java path in mac
Java
0 vote364 views1 answer
"https://unpkg.com/[email protected]/dist/ThaanaKeyboard.min.js
Java
0 vote336 views1 answer
Sprint jpa properties for application.yml
Java
1 vote304 views1 answer
Combinations
Java
3 votes371 views1 answer
Android list length
Java
9 votes369 views3 answers
Array minimum element
Java