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This is the code for stack implementation on java without the use of collection class.

Author: sanyam63

stack.java

@@ -0,0 +1,68 @@
+public class stack 
+{
+	node head;
+	public static class node
+	{
+		int data;
+		node next;
+		node(int data)
+		{
+			this.data=data;
+			next=null;
+		}
+	}
+	public static stack push(stack st,int data)
+	{
+		node new_node=new node(data);
+		if(st.head==null)
+		{
+			st.head=new_node;
+			return st;
+		}
+		else
+		{
+			node temp=st.head;
+			while(temp.next!=null)
+				temp=temp.next;
+			temp.next=new_node;
+			return st;
+		}
+	}
+	public static stack pop(stack st)
+	{
+		stack str= new stack();
+		node temp=st.head;
+		while(temp.next!=null)
+		{
+			if(temp.next!=null)
+			str=push(str,temp.data);
+			temp=temp.next;
+		}
+		return str;
+	}
+	public static void display(stack st)
+	{
+		node temp=st.head;
+		while(temp!=null)
+		{
+			
+			System.out.print(temp.data+"\t");
+			temp=temp.next;
+		}
+	}
+	public static void main(String args[])
+	{
+		stack st=new stack();
+		st=push(st,1);
+		st=push(st,2);
+		st=push(st,3);
+		st=push(st,4);
+		st=pop(st);
+		st=pop(st);
+		st=pop(st);
+		st=push(st,5);
+		display(st);
+	}
+}
+	
+