net.sf.drawj2d.cmd

Class ExprCmd

java.lang.Object

net.sf.drawj2d.cmd.ExprCmd

All Implemented Interfaces:

Command

public class ExprCmd
extends java.lang.Object
implements Command

ExprCmd implements the "expr" command, which evaluates a mathematical expression.

Constructor Summary

Constructors

Constructor and Description
ExprCmd(API api)

Method Summary

Modifier and Type	Method and Description
Thing	cmdCode(Interp interp, Thing[] argv) The cmdCode method takes an interpreter and an array of Things, performs some calculations, and returns a Thing representing the computed value, or null.
static void	main(java.lang.String[] args) Test the expr command.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ExprCmd

public ExprCmd(API api)

Method Detail

cmdCode

public Thing cmdCode(Interp interp,
                     Thing[] argv)
              throws HeclException

Description copied from interface: Command

The cmdCode method takes an interpreter and an array of Things, performs some calculations, and returns a Thing representing the computed value, or null.

Specified by:

cmdCode in interface Command

Parameters:

interp - an Interp value

argv - a Thing[] value

Returns:

A Thing representing the computed value, or null.

Throws:

HeclException - if an error occurs

main

public static void main(java.lang.String[] args)

Test the expr command.

Parameters:

args -