code problem

[nitin ratra]

hello, everyone I have a doubt ?

import java.io.*;
public class Independence {
 
/**
 * @param args
 */
 String date;
 String var;
 

public Independence(String date,String var){
date=this.date;
var=this.var;
}
 Independence ind=new Independence(date,var);
  
public String Iday(String date){
if (date.equals("15")){
   var= "happy independence day India";
  }else if(date.equals("14")){
   var="happy Independence day pakistan";  
 } else{
 var="no independence day";
 }
 return var;
}



public static void main(String[] args)throws IOException {
 
 InputStreamReader inp=new InputStreamReader(System.in);
 BufferedReader br=new BufferedReader(inp);
 System.out.println("Enter the date");
  date=br.readLine();
nitin= ind.Iday;
 
  }
 
}

[HENRY: Added Code Tags]
[ August 15, 2008: Message edited by: Henry Wong ]

[nitin ratra]

What is wrong in this code ?
Actually I thinking I have done some errors in accessing the static method inside the main method. SO people how do I acess the non static method inside main method?

Actually I want to access the Iday

[Richard Bradford]

There are a few things wrong.

Firstly, you can't access the non static methods directly from main. Instead create your Independence instance within the main method (check the variable assignment in your constructor its the wrong way round) and call its Iday method.
[ August 15, 2008: Message edited by: Richard Bradford ]

[Campbell Ritchie]

I have already told you, please Use Code Tags and tell us in the subject line what the topic is about.

[Stephen Davies]

Hi Nitin,

I think what Richard mentioned, is that the first problem appears to lie with your constructor.

you have

public Independence(String date,String var){
date=this.date;
var=this.var;
}

when it should be:

public Independence(String date,String var){
this.date=date;
this.var=var;
}

Also I guess by your Class name, you are Indian? If so, may I wish you a very Happy Idependence day! Jai Hind!

[nitin ratra]

thanks friend for taking keen intrest in my problem and thanks for wishiing mee independence day , yes I am an Indian

[nitin ratra]

It must be a very simple question , but I want to ask it if you pepole can explain mee. I can provide a constructor to my class but actually I don't know what a constructor does?
I have read sun tutorial,but actually I can't get the real picture fo it .
Please if I can get something about constructor. I know it is a foolish type question but please if I get some knoledge of it.
regards
Nitin

[Satya Maheshwari]

I can provide a constructor to my class but actually I don't know what a constructor does?

One way of looking constructor is to consider it as a suitable place where you can write code which needs to be executed whenever an object of that class is intantiated. The code should usually be doing the initialization stuff for that object.

[Campbell Ritchie]

Originally posted by Satya Maheshwari:

I can provide a constructor to my class but actually I don't know what a constructor does?

One way of looking constructor is to consider it as a suitable place where you can write code which needs to be executed whenever an object of that class is intantiated. The code should usually be doing the initialization stuff for that object.

Be bold, Maheshwari!

The constructor is where you initialise the object. Not "should" or "usually." For the beginner, let's think of that as "always." [There are other ways to initialise objects, like factory methods, but let's look on them as more advanced than we need here.]

Every field has a default value when it is declared, but that is usually not suitable for real-life use, so you initialise them to "real" values in the constructor.

Nitin: who is teaching you programming? Have you got a course of any sort?

[Satya Maheshwari]

Be bold, Maheshwari!

With experts all around the ranch, one never knows when one has put himself in a spot.

[Arijit Daripa]

Nitin! your code should look like this

import java.io.*;
public class Independence {
     int day;
     int month;
     
     public Independence(int day,int month){
         this.day=day;
         this.month=month;
     }
 
     public String iDay(){
         String var;
         if (day==15 && month==8){
             var= "happy independence day India";
         }else if(day==14 && month==8){
             var="happy Independence day pakistan";  
         } else{
             var="no independence day";
         }
         return var;
     }
     
     public static void main(String[] args)throws IOException {
         InputStreamReader inp=new InputStreamReader(System.in);
         BufferedReader br=new BufferedReader(inp);
         System.out.println("Enter the day");
         int day = Integer.parseInt(br.readLine());
         System.out.println("Enter the month");        
         int month = Integer.parseInt(br.readLine());
         Independence ind = new Independence(day , month);
         String str = ind.iDay();
         System.out.println(str);
     }
}

[ August 15, 2008: Message edited by: ARIJIT DARIPA ]

[nitin ratra]

Thanks to all members .

[Campbell Ritchie]

You're welcome.

Please remember about titles for threads in future.