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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 static void main (String[] args) throws java.lang.Exception
	{
		 LinkedList<Integer> list = new LinkedList<Integer>();
 
   // populate the list  
   list.add(0);  
   list.add(-1);  
   list.add(3);  
   list.add(100);
   list.add(-70);
   list.add(-50);
 
 
   // comparing using natural ordering
    Collections.sort(Math.abs(list));
   System.out.println("Max val: " + list);  
 
   int size = list.size();
   System.out.println((list.get(size-1)));
   System.out.println((list.get(size-2)));
   System.out.println((list.get(size-3)));
 
 
   System.out.println(size);
	}
}

Main.java:24: error: no suitable method found for abs(LinkedList<Integer>)
    Collections.sort(Math.abs(list));
                         ^
    method Math.abs(int) is not applicable
      (argument mismatch; LinkedList<Integer> cannot be converted to int)
    method Math.abs(long) is not applicable
      (argument mismatch; LinkedList<Integer> cannot be converted to long)
    method Math.abs(float) is not applicable
      (argument mismatch; LinkedList<Integer> cannot be converted to float)
    method Math.abs(double) is not applicable
      (argument mismatch; LinkedList<Integer> cannot be converted to double)
1 error

Standard output is empty