Exception in thread "main" java.lang.NumberFormatException
Hi,
thanks to your helps i have developed a java application that receive an input file dato2.txt with this format
string double double double......
read the file and create an object with the key and the value.
When i compile i have no error but at runtime i have this exception
Caricamento dell'array di double in corso.....
Il numero di colonne del file ?2
Exception in thread "main" java.lang.NumberFormatException: For input string: "2
527,515572"
at sun.misc.FloatingDecimal.readJavaFormatString(Unknown Source)
at java.lang.Double.parseDouble(Unknown Source)
at AddDb2.populateMap(AddDb2.java:73)
at AddDb2.<init>(AddDb2.java:21)
at AddDb2.main(AddDb2.java:12)
my code is
//package gbattine;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.Map;
import java.util.StringTokenizer;
import java.util.TreeMap;
public class AddDb2 {
private static String fileName = "Dato2.txt";
private Map <String, double[]>dataMap = null;
public static void main(String[] args) throws IOException {
new AddDb2();
}
public AddDb2() throws IOException {
/* Get a reference to the input file. */
FileReader file = new FileReader(fileName);
BufferedReader br = new BufferedReader(file);
/* Create the empty map. */
this.dataMap = new TreeMap<String, double[]>(); //mettere hash
/* Populate the map from the input file. */
populateMap(br);
/* Display the contents of the map. */
displayMap(this.dataMap);
/* Close the reader. */
br.close();
}
/**
* Populate a TreeMap from an input file.
*
*
This method accomodates an input file with any number of lines in
it. It also
* accomodates any number of doubles on the input line as long as the
first value on the
* line is a String. The number of doubles on each input line can also
vary.
*
* @param bufferedReader
* @return a Map that has one element for each line of the input file;
the key is the first column from the input file and the entry is the array
of doubles that follows the first column
* @throws IOException
*/
public Map populateMap(BufferedReader bufferedReader) throws IOException
{
System.out.println("Caricamento dell'array di double in corso.....");
/* Store each line of the input file as a separate key and entry in
the Map. */
String line = null;
while ((line = bufferedReader.readLine()) != null) {
/* Create a tokenizer for the line. */
StringTokenizer st = new StringTokenizer(line);
/*
* Assuming that the first column of every row is a String and
the remaining columns
* are numbers, count the number of numeric columns.
*/
int ColNumber=st.countTokens()-1;
//int numberOfNumericColumns = st.countTokens() - 1;
int numberOfNumericColumns=(ColNumber-1);
System.out.println("Il numero di colonne del file ?+ColNumber);
/*
* Get the first token from the line. It will be a String and
its value will be a
* unique key for the rest of the row.
*/
String key = st.nextToken().trim();
/* Create the array for the numbers which make up the rest of
the line. */
double[] array = new double[numberOfNumericColumns];
/* Populate the array by parsing the rest of the line. */
for (int column = 0; column < numberOfNumericColumns; column++)
{
array[column] = Double.parseDouble(st.nextToken().trim());
}
/* Store the first column as the key and the array as the entry.
*/
this.dataMap.put(key, array);
}
return this.dataMap;
}
public void displayMap(Map<String,double[]> myMap) {
/* Iterate through the values of the map, displaying each key and
its corresponding array. */
for (Map.Entry<String, double[]> entry : myMap.entrySet()) {
/* Get and display the key. */
System.out.print(entry.getKey() + " : "); //$NON-NLS-1$
/* Get the array. */
double[] myArray = entry.getValue();
/*
* Display each value in the array. Put a semicolon after each
value except the last.
* Keep all the values for a given key on a single line.
*/
for (int ix = 0; ix < myArray.length; ix++) {
if (ix < myArray.length - 1) { //the value is not the last one in the array
System.out.print(myArray[ix] + "; "); //$NON-NLS-1$
} else { //the value is the last one in the array
System.out.println(myArray[ix]);
}
}
}
}
}
Another question is:how can i return from this function the ColNumber value to import it in another function that i'm developing?
Thanks very much
