first commit

hrmsEjb/org/nfunk/jep/function/ArcTangent2.java

@@ -0,0 +1,19 @@
+package org.nfunk.jep.function;
+
+import java.util.Stack;
+import org.nfunk.jep.ParseException;
+
+public class ArcTangent2 extends PostfixMathCommand {
+  public void run(Stack paramStack) throws ParseException {
+    checkStack(paramStack);
+    Number number1 = (Number)paramStack.pop();
+    Number number2 = (Number)paramStack.pop();
+    if (number2 instanceof Number && number1 instanceof Number) {
+      double d1 = ((Number)number2).doubleValue();
+      double d2 = ((Number)number1).doubleValue();
+      paramStack.push(new Double(Math.atan2(d1, d2)));
+    } else {
+      throw new ParseException("Invalid parameter type");
+    } 
+  }
+}