Character.isDigit(char a);
Determines if the specified character is a digit.
A character is a digit if its general category type, provided by Character.getType(ch), is DECIMAL_DIGIT_NUMBER. Some Unicode character ranges that contain digits: '\u0030' through '\u0039', ISO-LATIN-1 digits ('0' through '9')
'\u0660' through '\u0669', Arabic-Indic digits
'\u06F0' through '\u06F9', Extended Arabic-Indic digits
'\u0966' through '\u096F', Devanagari digits
'\uFF10' through '\uFF19', Fullwidth digits
Many other character ranges contain digits as well.
Determines if the specified character is a digit.
A character is a digit if its general category type, provided by Character.getType(ch), is DECIMAL_DIGIT_NUMBER. Some Unicode character ranges that contain digits: '\u0030' through '\u0039', ISO-LATIN-1 digits ('0' through '9')
'\u0660' through '\u0669', Arabic-Indic digits
'\u06F0' through '\u06F9', Extended Arabic-Indic digits
'\u0966' through '\u096F', Devanagari digits
'\uFF10' through '\uFF19', Fullwidth digits
Many other character ranges contain digits as well.
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- 排序
if(str.charAt(i)<0 || str.charAt(i)>9){
break;
}
}
for(int i=0;i<str.length();i++)
{
if(Character.isDigit(str.charAt(i)))
{
break;
}
}
这样可以判断字符串是否是16进制
{
var strInString=InString;
var strStardString=StardString;
var TempChar;
for (Count=0; Count < strInString.length; Count++)
{
TempChar= strInString.substring (Count, Count+1);
if (strStardString.indexOf (TempChar,0)==-1)
return false;
}
return true;
}這是寫在javascript裡面的
isInvail("12365","1234567890")) return true;
isInvail("123ew65","1234567890")) return false;給你參考一下
{
if(Character.isDigit(StarNum.charAt(i)))
{
long SNum = Long.parseLong(StarNum);
long ENum = Long.parseLong(EndNum);
}
else{
long SNum = Long.toHexString(StarNum);
long ENum = Long.toHexString(EndNum);
}
}
我这段代码错在哪?