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 vote179 views4 answers
Boolean
Java
0 vote246 views1 answer
A Java-8 stream of batches,
Java
0 vote202 views1 answer
1 2 1 3 2 1 4 3 2 1 3 2 1 2 1 1 java
Java
2 votes169 views1 answer
Set password visible in android
Java
0 vote251 views2 answers
Running Sum of 1d Array Java
Java
1 vote228 views1 answer
Spring boot id auto generated
Java
43 votes185 views5 answers
Convert string to char array in java
Java
2 votes227 views2 answers
Check if jcheckbox is checked java
Java
0 vote214 views3 answers
Maven compiler plugin for java 13
Java
0 vote169 views1 answer
Transformer une chaine de caractère en nombre java
Java