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/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{public void insert (T val) {
	Node<T> tmp;
     if (empty()){//If list is empty
     	current = head = new Node<T> (val);
     }
     else {
	   tmp = current.next;
	   current.next = new Node<T> (val);
	   current = current.next;
	   current.next = tmp;}
 }
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
	}
}

Main.java:9: error: cannot find symbol
{public void insert (T val) {
                     ^
  symbol:   class T
  location: class Ideone
Main.java:10: error: cannot find symbol
	Node<T> tmp;
	^
  symbol:   class Node
  location: class Ideone
Main.java:10: error: cannot find symbol
	Node<T> tmp;
	     ^
  symbol:   class T
  location: class Ideone
Main.java:11: error: cannot find symbol
     if (empty()){//If list is empty
         ^
  symbol:   method empty()
  location: class Ideone
Main.java:12: error: cannot find symbol
     	current = head = new Node<T> (val);
     	^
  symbol:   variable current
  location: class Ideone
Main.java:12: error: cannot find symbol
     	current = head = new Node<T> (val);
     	          ^
  symbol:   variable head
  location: class Ideone
Main.java:12: error: cannot find symbol
     	current = head = new Node<T> (val);
     	                     ^
  symbol:   class Node
  location: class Ideone
Main.java:12: error: cannot find symbol
     	current = head = new Node<T> (val);
     	                          ^
  symbol:   class T
  location: class Ideone
Main.java:15: error: cannot find symbol
	   tmp = current.next;
	         ^
  symbol:   variable current
  location: class Ideone
Main.java:16: error: cannot find symbol
	   current.next = new Node<T> (val);
	   ^
  symbol:   variable current
  location: class Ideone
Main.java:16: error: cannot find symbol
	   current.next = new Node<T> (val);
	                      ^
  symbol:   class Node
  location: class Ideone
Main.java:16: error: cannot find symbol
	   current.next = new Node<T> (val);
	                           ^
  symbol:   class T
  location: class Ideone
Main.java:17: error: cannot find symbol
	   current = current.next;
	   ^
  symbol:   variable current
  location: class Ideone
Main.java:17: error: cannot find symbol
	   current = current.next;
	             ^
  symbol:   variable current
  location: class Ideone
Main.java:18: error: cannot find symbol
	   current.next = tmp;}
	   ^
  symbol:   variable current
  location: class Ideone
15 errors

Standard output is empty