Stack Using Java


package sub.datastructure;

public class Stack {

private Node head;
private Node tail;
private int length;

public Stack() {
head = new Node();
tail = head;
length = 0;
}

public void push(Object data) {
Node node = new Node(data);
node.setNext(head);
head = node;
length++;
}

public Node pop() {
if(length == 0) return null;
Node node = head;
head = node.getNext();
node.getNext().setNext(null);
length--;
System.gc();
return node;
}

public void print() {
Node node = head;
while(node.getNext() != null) {
System.out.println(node.getData());
node = node.getNext();
}
}
}


Create Node


package sub.datastructure;

public class Node {

private Object data;
private Node next;

public Node() {
}

public Node(Object data) {
this.data = data;
}

public void setData(Object data) {
this.data = data;
}

public void setNext(Node next) {
this.next = next;
}

public Object getData() {
return data;
}

public Node getNext() {
return next;
}
}


Hello World, The First Programme

Hello World in C

#include <stdio.h>

int main() {
printf("Hello World");
return 0;
}

Hello World in C++

#include <iostream>

using namespace std;
int main() {
cout<< "Hello World";
return 0;
}

Hello World in C#

public class HelloWorld {
public static void Main(string[] args) {
System.Console.Writeline("Hello World");
}
}

Hello World in Java

public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello World");
}
}