| Messages of subject
Using comparison |
ameet
Location : Mozambique
Member since : Jul 21, 2005
Messages : 1
|
 Jul 21, 2005 at 6:17 PM
I want to calculate the result of simple expressions like this:
"45>30"
"2<=3"
How can I do it?
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Ameet
|
Bussard
Member since : Jan 30, 2012
Messages : 1
|
 Jan 30, 2012 at 4:13 PM
If anybody else needs this information it can be done this way:
public boolean calcBoolFormula( String formula ) throws CompilationException{
CalculatorParser parser = new CalculatorParser (new JavaSyntax());
Double result = parser.computeExpression(formula);
return result.equals(DoubleInterpreter.TRUE_DOUBLE);
}
Usage:
public static void main(String[] args) {
try {
System.out.println("1>2"+calcBoolFormula("1>2"));
System.out.println("1=1"+calcBoolFormula("1 == 1"));
System.out.println("1<2"+calcBoolFormula("1<2"));
} catch (CompilationException e) {
e.printStackTrace();
}
}
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