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Java Java Data Structures Organizing Data Interfaces

nazim khan
nazim khan
1,409 Points

had Some small doubt in the code

Hi This is Nazim the code shown in video

package com.teamtreehouse;
import java.util.Date;

public class Treet implements Comparable{
private String mAuthor;
private String mDiscription;
private Date mCreationDate;

  public Treet(String author,String discription,Date creationDate){
   mAuthor= author;

public String toString(){
return "Tweet :  "+mDiscription  +"-@"+mAuthor; 

  //Interface Example(
 Pulic int compareTo(Object obj){
 Treet other=(Treet)obj;

   if(equals(other)){        //got doubt in this line
     return 0;
   int dateCmp=mCreationDate.compareTo(other.mCreationDate)

   return mDiscription.compareTo(other.mDiscription)
   return dateCmp;

public String getAuthor(){
return mAuthor;
public String getDiscription(){
return mDiscription;
public Date getCreationDate(){
return mCreationDate;
  public String[] getWords(){
  return mDiscription.toLowerCase().split("[^\\w@#]+");


in Interface example block in the if Statement what we are comparing with (other)Object

1 Answer


if(equals(other)){        //got doubt in this line
     return 0;

this is comparing if 'this' object  the 'other' object.   'this' is implicit here.  try 

if(this.equals(other) .....