sorting - ArrayList sort issue -

i having issue code trying compare not working getting no suitable method found sort(int) first class caru class contains method , second method in class

import java.io.*;  public class caru extends car implements serializable  {     private string number;     private int price;     private string phone;          public caru()     {         number = "";         price = 0;         phone = "";     }          public caru(string n1,int p,string pp,string ma,string mo,string br,int yo,string en)     {         super(ma,mo,br,yo,en);         number = n1;         price = p;         phone = pp;     }           public void setnum(string n1)      {          number = n1;      }           public string getnum()      {         return number;      }              public void setprice(int p)      {          price = p;      }           public int getprice()      {         return price;      }              public void setphone(string pp)      {          phone = pp;      }           public string getphone()      {         return phone;      }             public string tostring()      {          return  "\n car manufacturer: "+getmake()+                  "\n phone: "+getphone()+ " price: €"+getprice()+                  "\n car number: "+getnum()+                  "\n car model: "+getmodel()+                  "\n car type: "+gettype()+                  "\n year of make: "+getyom()+                  "\n car engine: "+geteng();              }            }

public void lis() throws ioexception, classnotfoundexception{              file infile = new file("carus");              fileinputstream infilestream = new fileinputstream(infile);              objectinputstream inobjectstream = new objectinputstream(infilestream);                list carlist;              carlist = new arraylist();                try              {                  carlist = (list)inobjectstream.readobject();              }              catch (exception z){                  system.out.println("no cars available");              }              finally{                    inobjectstream.close();                                    (int i=0;i<carlist.size();i++)                  {                      caru temp = (caru)carlist.get(i);                      collections.sort(temp.getprice());                      system.out.println((caru)carlist.get(i));                      system.out.println("============================");                                                      }          }      }

you need create custom comparator below.

  package com.expertwebindia;      public class pricecomparator extends comparator<caru> {             public int compare(caru  c1, caru  c2) {                 return c1.getprice()-c2.getprice();             }         } 

pass in collections.sort() method below.

  collections.sort(carlist,new pricecomparator());