first commit

hrmsEjb/org/nfunk/jep/function/TanH.java

@@ -0,0 +1,23 @@
+package org.nfunk.jep.function;
+
+import java.util.Stack;
+import org.nfunk.jep.ParseException;
+import org.nfunk.jep.type.Complex;
+
+public class TanH extends PostfixMathCommand {
+  public void run(Stack paramStack) throws ParseException {
+    checkStack(paramStack);
+    Object object = paramStack.pop();
+    paramStack.push(tanh(object));
+  }
+  
+  public Object tanh(Object paramObject) throws ParseException {
+    if (paramObject instanceof Complex)
+      return ((Complex)paramObject).tanh(); 
+    if (paramObject instanceof Number) {
+      double d = ((Number)paramObject).doubleValue();
+      return new Double((Math.exp(d) - Math.exp(-d)) / (Math.pow(Math.E, d) + Math.pow(Math.E, -d)));
+    } 
+    throw new ParseException("Invalid parameter type");
+  }
+}