Constructor question.Help!

Question

Hi,
I need help!I've been trying to do this for several hours now.
My program takes in parameters a file cellSig.txt and a int in the main program and the int gives the number of for loops that need to be run.Now in the for loop,I have a constructor for class ranData.
for(int model = 0;model<= cross; model++){
ranData objData = new ranData(filename);
}//cross is the parameter int given by user
ranData basically takes the main file cellSig.txt and randomises and divides into 2 other files.It is vital that there should be different files for every 'for' loop.
However I compile and
./ranData.java:5: illegal start of type
try{
^
./ranData.java:40: <identifier> expected
^
keyInput.java:18: cannot resolve symbol
symbol : constructor ranData (java.lang.String)
location: class ranData
ranData objData = new ranData(filename);
I'm posting the ranData.java code below.Pls help..I'm not sure what is wrong.
import java.io.*;
import java.util.*;
public class ranData{
     ArrayList list = new ArrayList();
     try{
     BufferedReader in = new BufferedReader(new FileReader(filename));
     String FileToRead = in.readLine();
     while(FileToRead!= null){
          list.add(FileToRead);
          FileToRead = in.readLine();
     in.close();
     in = null;
     Collections.shuffle(list);
     List trainList = list.subList(0,2000);
     List testList = list.subList(2000,list.size());
     BufferedWriter  objBW =  new BufferedWriter(new FileWriter("cellSig.names"));
     BufferedWriter  objBWt =  new BufferedWriter(new FileWriter("cellSig.names"));
     Iterator x = trainList.iterator();
     Iterator y = testList.iterator();
     String tmp = "";
     String temp = "";
     while(x.hasNext()){
          tmp =(String) x.next() ;
          objBW.write(tmp);
          objBW.newLine();
     while(y.hasNext()){
          temp = (String)y.next() ;
          objBWt.write(temp);
          objBWt.newLine();
     objBW.close();
     objBWt.close();
     objBW = objBWt = null;
     x = y = null;
     }catch(IOException e){
     System.out.println(e);
[\code]                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

Answer 1

public RanData(String filename){     
     Filename = filename;
     try{
     BufferedReader in = new BufferedReader(new FileReader(Filename));
     String FileToRead = in.readLine();You are closing the constructor and start coding again without declaring the try catch within a method. Try this:
import java.io.*;
import java.util.*;
public class RanData{
     ArrayList list = new ArrayList();
     public String Filename;
     public RanData(String filename){     
     Filename = filename;
     try{
     BufferedReader in = new BufferedReader(new FileReader(Filename));
     String FileToRead = in.readLine();
     while(FileToRead!= null){
          list.add(FileToRead);
          FileToRead = in.readLine();
     in.close();
     in = null;
     Collections.shuffle(list);
     List trainList = list.subList(0,2000);
     List testList = list.subList(2000,list.size());
     BufferedWriter  objBW =  new BufferedWriter(new FileWriter("cellSig.names"));
     BufferedWriter  objBWt =  new BufferedWriter(new FileWriter("cellSig.names"));
     Iterator x = trainList.iterator();
     Iterator y = testList.iterator();
     String tmp = "";
     String temp = "";
     while(x.hasNext()){
          tmp =(String) x.next() ;
          objBW.write(tmp);
          objBW.newLine();
     while(y.hasNext()){
          temp = (String)y.next() ;
          objBWt.write(temp);
          objBWt.newLine();
     objBW.close();
     objBWt.close();
     objBW = objBWt = null;
     x = y = null;
     }catch(IOException e){
     System.out.println(e);
}I also reccomend you to read a good Java beginners books