JS判断for (var i = 0; i <(str+"").length; i++)
{
var oneChar = str.charAt(i)
if (oneChar < "0" || oneChar > "9")
{
alert("身高请输入数字.")
return;
}
}
{
var oneChar = str.charAt(i)
if (oneChar < "0" || oneChar > "9")
{
alert("身高请输入数字.")
return;
}
}
或者:
for(int i=0;i<s.length();i++)
{char ch=s.charAt(i);
bool b=false;
for(int j=0;j<=9;j++)
if(Ingerger.parseInt(ch)==j) {b=true;break;}
if(b==true) System.out.println("是0~9之间的数字");
}
char[] c = s.toCharArray();
for (int i=0;i<c.length;i++){
bool b=false;
for(int j=0;j<=9;j++)
if(Ingerger.parseInt(c[i])==j) {b=true;break;}
if(b==true) System.out.println("是0~9之间的数字");
}