RegexMinus.java

package com.oz.test;

import junit.framework.TestCase;
import org.junit.Test;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Created with IntelliJ IDEA.
 * User: asanchez
 * Date: 30/01/14
 * Time: 09:57 AM
 *
 * @author <a href="jaehoo@gmail.com">Alberto Sánchez</a>
 *         Contact me by:
 *         <ul><li>Twitter: @jaehoox</li><ul>
 */
public class DummyTest extends TestCase{

    @Test
    public void testRemoveMinusSign() throws Exception {

        String [] values= {"1000-", "200,00 -","30 00 - "," 500.00 -   ","300     -","000- x        -"};

        for(String v :values){
            System.out.println(removeMinus(v));
        }

    }

    /**
     * Replace minus sign and put at the begin of the String
     * @param strValue
     * @return move minus sign at the begin of the String, if not match return original String value
     */
    public String removeMinus(String strValue){

        String pattern="\\-\\s*$";

        Pattern p= Pattern.compile(pattern);
        Matcher m= p.matcher(strValue);

        if(m.find()){
            return "-"+m.replaceFirst(" ");
        }else{
            return strValue;
        }

    }

}