is Scientific number by Regex - Java java.util.regex

Java examples for java.util.regex:Match Number

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Description

is Scientific number by Regex

Demo Code


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

public class Main{
    /*from  w w  w. j av a  2  s  . c  o m*/
    public final static String SCIENTIFIC_A = "^[-+]?(\\d+(\\.\\d*)?|\\.\\d+)([eE]([-+]?([012]?\\d{1,2}|30[0-7])|-3([01]?[4-9]|[012]?[0-3])))$";
    
    public static boolean isScientific(String str) {
        if (StrisNull(str))
            return false;
        return Regular(str, RegexHelper.SCIENTIFIC_A);
    }
    
    public static synchronized boolean StrisNull(String str) {
        return null == str || str.trim().length() <= 0 ? true : false;
    }
    
    private static boolean Regular(String str, String pattern) {
        if (null == str || str.trim().length() <= 0)
            return false;
        Pattern p = Pattern.compile(pattern);
        Matcher m = p.matcher(str);
        return m.matches();
    }
}

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