package com.nd.util;
/**
 * 字符串帮助类
 * @author wzl
 */
public class StringUtils {

	public static boolean isEmpty(String str){
		if("".equals(str) || str == null){
			return true;
		}
		
		return false;
	}
	
	public static void main(String args[]){
//		double countsize = 155.05;
//		double zhi=(double) (countsize/50.00);
//		int ye = (int) Math.ceil(zhi)-1;
//		System.out.print(ye);
		
		System.out.println(3.0+4.0);
	}
	
}