Java Regex Double Validate parseDoubleList(String list)

Description

Scans an input string for double values.

License

Open Source License

Declaration

public synchronized static double[] parseDoubleList(String list) 

Method Source Code

//package com.java2s;

import java.util.*;
import java.util.regex.*;

public class Main {
    static final Matcher fpMatch = Pattern
            .compile("([-+]?((\\d*\\.\\d+)|(\\d+))([eE][+-]?\\d+)?)(\\%|in|cm|mm|pt|pc|px|em|ex)?").matcher("");

    /**/*from   ww w.  j  ava 2s .c o m*/
     * Scans an input string for double values.  For each value found, places
     * in a list.  This method regards any characters not part of a floating
     * point value to be seperators.  Thus this will parse whitespace seperated,
     * comma seperated, and many other separation schemes correctly.
     */
    public synchronized static double[] parseDoubleList(String list) {
        if (list == null)
            return null;

        fpMatch.reset(list);

        LinkedList doubList = new LinkedList();
        while (fpMatch.find()) {
            String val = fpMatch.group(1);
            doubList.add(Double.valueOf(val));
        }

        double[] retArr = new double[doubList.size()];
        Iterator it = doubList.iterator();
        int idx = 0;
        while (it.hasNext()) {
            retArr[idx++] = ((Double) it.next()).doubleValue();
        }

        return retArr;
    }
}

Related

1. parseDouble(Object object)
2. parseDouble(Object value, Double replace)
3. parseDouble(String myString)
4. parseDouble(String s)
5. parseDouble(String str)