validation specifications for sorting date,integer,string...

[vasantkr kr]

Input File:
sss.java 88
sss.java 89.5
sss.html 99.5
sss.java 11/13/2005
sss.html 02/22/2005
sss.html 02/23/2005
sss.java 89
.
.
.
// n inputs

Output File:
1.Sorted List for sss.java:
88
89
2.Sorted Decimal List for sss.java
89.5
3.Sorted Date list for sss.java
13-Nov-2005
23-feb-2005

1.Sorted List for sss.html:
88
89
2.Sorted Decimal List for sss.html
99.5
3.Sorted Date list for sss.html
22-feb-2005


The requirement is to read the data line by line as given in the input file for 'n' entries and then present the output by sorting.Output should be similar to the one shown in 'output file'.
Here is what i have done so far.......

 
import java.io.*;
import java.util.*;
 
class sharp1  {
static PrintWriter out;
static String str;
static String str1;
static BufferedReader br;
static BufferedReader br1;
    static int ch;
    static FileInputStream fin;
    static StringBuffer sBuff;    
    static String result1[];
    
    public static void main(String args[]) {
try {
sBuff=new StringBuffer();
br=new BufferedReader(new InputStreamReader(System.in));
out=new PrintWriter(new FileOutputStream("input.txt"));
System.out.println("Till here its fine");
System.out.println("Press Enter");
str=br.readLine();

while(!str.contentEquals("x")) {
System.out.println("Enter data:");
sBuff.append(str+"\r"+"\n");
str=br.readLine();

}
out.println(sBuff+"\r"+"\n");
out.close();

getData();
 }
 
catch(Exception ex) {
System.out.println("Error:"+ex);
}
}
    
    public static void getData() throws Exception
{  
    try {
       fin=new FileInputStream("input.txt");
       br1=new BufferedReader(new InputStreamReader(fin));   
       
       str1=br1.readLine();
         
       while(str1!=null) 
       {       
       str1=br1.readLine();
       str1.trim();
       String result1[]=str1.split(" \\s*");
       //System.out.println(str1);
   System.out.println("\t"+result1[1]);   
       }       
    br1.close();  
  }
    catch(Exception ex) {
    System.out.println(".......I/O exception ");
    }    
}  
}//end of class

   

//After this i need help to sort the values so that i can present them in the format specified in the output file.
[ January 25, 2006: Message edited by: vasantkr kr ]

[Hilton Meyer]

do you need a sorting algorithm or the whole program??

[David O'Meara]

Sounds like homework, can we see what you have so far, and maybe indicate specific parts you need help with?

thanks,
Dave.

[Jesper de Jong]

Here are some links.

To learn how to read a file in Java, see the I/O tutorial. You can use java.io.BufferedReader to read a file line by line, or java.util.Scanner if you are using Java version 1.5.

You will need to store the data that the program reads in a list or array. See the Collections tutorial to learn how to use the Java Collections API.

You can sort a List in Java by using the one of the sort(...) methods in class java.util.Collections. See the API documentation.

[Jesper de Jong]

vasantkr kr,

Why did you respond to my post with a private message instead of just posting your question here?

I have finished reading the file and split the contents(i.e the string and the number).
From here i have to sort the contents.
The problem comes when am trying to read the date and to print it in the format specified in the output file.

Please explain exactly what "the problem" is. Did you write some code? Does it compile or not? Do you get an error message? If yes, copy & paste the error message here.

You can parse and format dates using java.text.SimpleDateFormat (see the API documentation).

[vasantkr kr]

sorry about posting a personal message.Thanks for the help.