The following snippet reads your file containing values and converts it into props and from that property obj generate two arrays objs 

create a prop obj 
create a file input stream 
load the file 
and then use 
properties.load(filepath) method 

this converts the vals in file into props 
from props u can get two arrays as u require 


Properties p = new Properties(); 
FileInputStream fi = null; 
File f = new File(filepath); 
String canonicalpath = f.getCanonicalPath(); 
String fring = path; 
File file = new File(fring); 
fis=new FileInputStream(file); 
p.load(fis); 

properties.load(file) 

 More Detailed description 

import java.io.*; 
class FileRead 
{ 
public static void main(String args[]) 
{ 
try{ 
// Open the file that is the first 
// command line parameter 
FileInputStream fstream = new FileInputStream("textfile.txt"); 
// Get the object of DataInputStream 
DataInputStream in = new DataInputStream(fstream); 
BufferedReader br = new BufferedReader(new InputStreamReader(in)); 
String strLine; 
String temp[] = new String[2]; 
String array1[] = new String[6000]; 
String array2[] = new String[6000]; 
//Read File Line By Line 
int i=0; 
while ((strLine = br.readLine()) != null) { 
// Print the content on the console 
// System.out.println (strLine); 
//Split and assign in the arrays 
temp = strLine.split("\t"); 
array1[i] = temp[0]; 
array2[i] = temp[1]; 
System.out.println (array1[i] + " " + array2[i]); 
i++; 
} 
//Close the input stream 
in.close(); 
}catch (Exception e){//Catch exception if any 
System.err.println("Error: " + e.getMessage()); 
} 
} 
} 
Thanks & Regards, 
Rathish 
On Wed, Sep 24, 2008 at 8:28 PM, singi1 via java-l < 
java-l@groups.ittoolbox.com> wrote: 
> 
> 
> 
> 
> hi .. 
> I have a file in the below format 
> 
> 1 0.9 
> 2 0.7 
> 3 2.3 
> .. 
> . 
> . 
> . 
> .. 
> 6000 0.4 
> 
> here 1 and 0.9 in the first line is seperated by tab... 
> now i must read this file and store them in 2 arrays.. 
> (file stored in pc) 
> i.e., 1,2,3,4.....6000 in one array say array1[](all column-1 values in one 
> array) 
> 0.9,0.7,............0.4 in another array say array2[](column-2 values in 
> another array) 
> 
> so that it becomes easy for me to draw a jfreechart for above values.. 
> i.e., I must draw chart with values in array1[] on x-axis and array2[] 
> values in y-axis.