Pomelo Lee workspace

package com.liyz.num.test;
 
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
public class TestNum {
	public static void main(String[] args) {
 
		boolean num=isNumeric("gg");
		System.out.println(num);
		boolean num2=isNum("25p");
		System.out.println(num2);
 
	}
 
	//jdk method java类库自带的方法
	public static boolean  isNum(String msg){
		char[] msgchar=msg.toCharArray();
		for(char mc:msgchar){
			if(!Character.isDigit(mc)){
				return false;
			}
		}
		return true;
		}
	// base on pattern 用正则表达式
	public static boolean isNumeric(String str)
	{
	Pattern pattern = Pattern.compile("[0-9]*");
	Matcher isNum = pattern.matcher(str);
	if( !isNum.matches() )
	{
	return false;
	}
	return true;
	}
}

<--script type="text/javascript">
    //系统函数的调用，感觉最简单
    if(isNaN("25")){
      alert("请输入数字");
    }
    //基于正则表达式的自己写的函数
    function isdigit(s)
   {
     var r,re;
           re = /\d*/;
           r = s.match(re);
           return (r==s)?true:false;
    }
     var s1 = "123";
     var s2 = "45a";
     var s3 = "bcd";
     var s4 = "e6"
   alert("s1="+isdigit(s1)+"s2="+isdigit(s2)+"s3="+isdigit(s3)+"s4="+isdigit(s4));
 
    <--/script>