Validate if a given string is numeric.
Some examples:
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| "0" => true
" 0.1 " => true
"abc" => false
"1 a" => false
"2e10" => true
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| public class ValidNumber {
public boolean isNumber(String s) {
if(s.trim().isEmpty()){
return false;
}
String regex = "[-+]?(\\d+\\.?|\\.\\d+)\\d*(e[-+]?\\d+)?";
if(s.trim().matches(regex)){
return true;
}else{
return false;
}
}
}
|