Java/Numeric: Difference between revisions
From charlesreid1
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==Check if a string is numeric== | |||
To check if a String in Java is numeric, build a simple utility function: | To check if a String in Java is numeric, build a simple utility function: | ||
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public static boolean isNumeric(String str) | public static boolean isNumeric(String str) | ||
{ | { | ||
try | |||
{ | |||
double d = Double.parseDouble(str); | |||
} | |||
catch(NumberFormatException nfe) | |||
{ | |||
return false; | |||
} | |||
return true; | |||
} | } | ||
</pre> | </pre> | ||
Revision as of 20:32, 18 June 2017
Check if a string is numeric
To check if a String in Java is numeric, build a simple utility function:
public static boolean isNumeric(String str)
{
try
{
double d = Double.parseDouble(str);
}
catch(NumberFormatException nfe)
{
return false;
}
return true;
}
Flags
 |
Computer Science notes on computer science topics on the wiki, for educational and learning purposes
Part of the 2017 CS Study Plan.
Python/Exceptions · Python/Assertions · Python/Decorators Python/Os (os module) · Python/Strings Python/Splat · Python/Iterators · Python/Generators Python/Comparators · Python/Lambdas
Builtin features of Java: Java/Exceptions · Java/Assertions · Java/Memory · Java/Interfaces Java/Generics · Java/Decorators · Java/Diamond Notation Java/Iterators · Java/Iterable · Iterators vs Iterable Java/Comparators · Java/Comparable · Comparators vs Comparable Java/Numeric · Java/TypeChecking · Java/Testing · Java/Timing · Java/Profiling Documentation: Javadocs · Java/Documentation Tools and functionality: Java/URLs · Java/CSV External libraries: Guava · Fastutil · Eclipse Collections OOP: OOP Checklist · Java/Abstract Class · Java/Encapsulation · Java/Generics
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See also: