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 vote152 views1 answer
Edittext hint color
Java
0 vote172 views2 answers
Instance of
Java
0 vote135 views3 answers
How to set image dynamically in android
Java
0 vote156 views1 answer
How to get internet speed in android programmatically
Java
0 vote161 views1 answer
Spring boot jackson infinite recursion
Java Spring
6 votes169 views2 answers
Check type of variable java
Java
0 vote136 views1 answer
Swapping techniques using java
Java
1 vote166 views2 answers
Arraylist input from user java
Java
0 vote152 views1 answer
Recyclerview scramble after scrolling
Java
1 vote143 views1 answer
File to multipartfile in java
Java