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JEP is a Java library for parsing and evaluating mathematical expressions.
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/*****************************************************************************
JEP 2.4.1, Extensions 1.1.1
April 30 2007
(c) Copyright 2007, Nathan Funk and Richard Morris
See LICENSE-*.txt for license information.
*****************************************************************************/
package org.nfunk.jep.function;
import java.lang.Math;
import java.util.*;
import org.nfunk.jep.*;
import org.nfunk.jep.type.*;
public class ArcSine extends PostfixMathCommand
{
public ArcSine()
{
numberOfParameters = 1;
}
public void run(Stack inStack)
throws ParseException
{
checkStack(inStack);// check the stack
Object param = inStack.pop();
inStack.push(asin(param));//push the result on the inStack
return;
}
public Object asin(Object param)
throws ParseException
{
if (param instanceof Complex)
{
return ((Complex)param).asin();
}
else if (param instanceof Number)
{
return new Double(Math.asin(((Number)param).doubleValue()));
}
throw new ParseException("Invalid parameter type");
}
}