Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

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

public class Main {
    public static boolean isNumber(String str) {
        if (isLong(str)) {
            return true;
        }
        Pattern pattern = Pattern.compile("(-)?(\\d*)\\.{0,1}(\\d*)");
        Matcher isNum = pattern.matcher(str);
        if (!isNum.matches()) {
            return false;
        }
        return true;
    }

    public static boolean isLong(String str) {
        if ("0".equals(str.trim())) {
            return true;
        }
        Pattern pattern = Pattern.compile("^[^0]\\d*");
        Matcher isNum = pattern.matcher(str);
        if (!isNum.matches()) {
            return false;
        }
        return true;
    }

    public static String trim(String input) {
        if (input == null)
            return "";
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < input.length(); i++) {
            if (input.charAt(i) == ' ') {
                continue;
            } else {
                sb.append(input.charAt(i));
            }
        }
        return sb.toString();
    }
}