slogo.instruction

Class Clean

java.lang.Object

slogo.GrammarElement

slogo.instruction.Instruction

slogo.instruction.Clean

public class Clean
extends Instruction

A Clean instruction has zero components: when called, it will clear the screen. To evaluate a Clean instruction the lines are cleared.

The value returned by evaluating a Clean instruction is just the name of the instruction itself.

Field Summary

Fields inherited from class slogo.GrammarElement

gelementsToValue

Constructor Summary

Constructors

Constructor and Description
Clean()

Method Summary

Modifier and Type	Method and Description
java.lang.Object	evaluate(Context c) Evaluate this instruction in a Context.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Clean

public Clean()

Method Detail

evaluate

public java.lang.Object evaluate(Context c)

Evaluate this instruction in a Context.

Specified by:

evaluate in class Instruction

Parameters:

c - the Context for the evaluation

Returns:

null

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

Returns:

a String representing this instruction as Clean