How to read CSV File using Java StringTokenizer

Reading CSV file is required often in java projects. Instead of using parsing it manually via array or something like that. This sample shows how to parse comma separated file using Java StringTokenizer or read csv file using Java StringTokenize.

Parse CSV File using StringTokenizer

package com.javabycode.csv;

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.StringTokenizer;

public class ReadCSVFileSample {
	public static void main(String[] args) {
        
        try
        {
               
            //csv file containing data
            String filePath = "C:/javabycode/filedata.csv";
           
            //read csv data into buffer
            BufferedReader buf = new BufferedReader( new FileReader(filePath));
            String strLine = "";
            StringTokenizer strToken = null;
            int lineNumber = 0, tokenNumber = 0;
           
            //parse comma separated line by line
            while( (strLine = buf.readLine()) != null)
            {
                lineNumber++;                       
                //break comma separated line using ","
                strToken = new StringTokenizer(strLine, ",");                       
                while(strToken.hasMoreTokens())
                {
                    tokenNumber++;
                    System.out.println("Line number: " + lineNumber + ", Token number: " + tokenNumber + ", Token : "+ strToken.nextToken());
                }                       
                //reset token number
                tokenNumber = 0;                       
            }
               
        }
        catch(Exception e)
        {
                System.err.println("Exception while reading csv file: " + e);                  
        }
	}
}

package com.javabycode.csv;

import java.io.BufferedReader;

import java.io.FileReader;

import java.util.StringTokenizer;

public class ReadCSVFileSample {

public static void main(String[] args) {

try

{

//csv file containing data

String filePath = "C:/javabycode/filedata.csv";

//read csv data into buffer

BufferedReader buf = new BufferedReader( new FileReader(filePath));

String strLine = "";

StringTokenizer strToken = null;

int lineNumber = 0, tokenNumber = 0;

//parse comma separated line by line

while( (strLine = buf.readLine()) != null)

{

lineNumber++;

//break comma separated line using ","

strToken = new StringTokenizer(strLine, ",");

while(strToken.hasMoreTokens())

{

tokenNumber++;

System.out.println("Line number: " + lineNumber + ", Token number: " + tokenNumber + ", Token : "+ strToken.nextToken());

}

//reset token number

tokenNumber = 0;

}

catch(Exception e)

{

System.err.println("Exception while reading csv file: " + e);

}

Input data
"Banana","Apple","Orange","Kiwi" "Mango","Lemon","Cherry","Grape","Tomato","Strawberry"

Output
Line number: 1, Token number: 1, Token : "Banana" Line number: 1, Token number: 2, Token : "Apple" Line number: 1, Token number: 3, Token : "Orange" Line number: 1, Token number: 4, Token : "Kiwi" Line number: 2, Token number: 1, Token : "Mango" Line number: 2, Token number: 2, Token : "Lemon" Line number: 2, Token number: 3, Token : "Cherry" Line number: 2, Token number: 4, Token : "Grape" Line number: 2, Token number: 5, Token : "Tomato" Line number: 2, Token number: 6, Token : "Strawberry"

That’s all on how to read csv file using java StringTokenize. Welcome any comment if you have other way to do this thing.

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