SumLine.java Source code

Introduction

Here is the source code for SumLine.java

Source

import java.io.FileReader;
import java.io.IOException;
import java.io.LineNumberReader;
import java.io.StreamTokenizer;

public class SumLine {

    public static void main(String[] a) throws IOException {
        sumLines("file.txt");
    }

    static void sumLines(String filename) throws IOException {
        LineNumberReader lnr = new LineNumberReader(new FileReader(filename));
        lnr.setLineNumber(1);
        StreamTokenizer stok = new StreamTokenizer(lnr);
        stok.parseNumbers();
        stok.eolIsSignificant(true);
        stok.nextToken();
        while (stok.ttype != StreamTokenizer.TT_EOF) {
            int lineno = lnr.getLineNumber();
            double sum = 0;
            while (stok.ttype != StreamTokenizer.TT_EOL) {
                if (stok.ttype == StreamTokenizer.TT_NUMBER)
                    sum += stok.nval;
                stok.nextToken();
            }
            System.out.println("Sum of line " + lineno + " is " + sum);
            stok.nextToken();
        }
    }
}