[leetcode]Valid Number
2014-10-28 18:41
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问题描述:
Validate if a given string is numeric.
Some examples:
Note: It is intended for the problem statement to be ambiguous. You should gather all requirements up front before implementing one.
考虑：93.3f, 23.43D ， 2341234L等数字均为无效数字，数字中包含的字母只能是e
代码：
Validate if a given string is numeric.
Some examples:
"0"=>
true
" 0.1 "=>
true
"abc"=>
false
"1 a"=>
false
"2e10"=>
true
Note: It is intended for the problem statement to be ambiguous. You should gather all requirements up front before implementing one.
考虑：93.3f, 23.43D ， 2341234L等数字均为无效数字，数字中包含的字母只能是e
代码：
public class Valid_Number { //java
public boolean isNumber(String s) {
if(s == null || s.trim().isEmpty())
return false;
s = s.trim().toLowerCase();
char ch = s.charAt(s.length()-1);
if(ch =='f' || ch =='l' || ch =='d')
return false;
try{
Double.valueOf(s);
return true;
}catch(Exception e){
return false;
}
}
}
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