Package commandManagers.commands

Class SumOfMetersAboveSeaLevel

java.lang.Object

commandManagers.Command

commandManagers.commands.SumOfMetersAboveSeaLevel

All Implemented Interfaces:

CommandInterface

public class SumOfMetersAboveSeaLevel
extends Command

Command class for computing the sum of meters above sea level of all cities in the collection.

Constructor Summary

Constructors

Constructor	Description
SumOfMetersAboveSeaLevel()

Method Summary

Modifier and Type	Method	Description
boolean	checkArgument(Object inputArgument)	Checks if the input argument is null, and returns true if it is, or false and prints an error message otherwise.
void	execute()	Computes the sum of meters above sea level of all cities in the collection and prints it to the console.
String	getDescr()	Base method for show command description.
String	getName()	Base method for show command name

Methods inherited from class commandManagers.Command

getArgument, isHasArgument, setArgument

Methods inherited from class java.lang.Object

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

Constructor Details

SumOfMetersAboveSeaLevel

public SumOfMetersAboveSeaLevel()

Method Details

getName

public String getName()

Description copied from class: Command

Base method for show command name

Specified by:

getName in interface CommandInterface

Specified by:

getName in class Command

Returns:

command name

getDescr

public String getDescr()

Description copied from class: Command

Base method for show command description.

Specified by:

getDescr in interface CommandInterface

Specified by:

getDescr in class Command

Returns:

command description

execute

public void execute()

Computes the sum of meters above sea level of all cities in the collection and prints it to the console.

Specified by:

execute in interface CommandInterface

Specified by:

execute in class Command

checkArgument

public boolean checkArgument(Object inputArgument)

Checks if the input argument is null, and returns true if it is, or false and prints an error message otherwise.

Specified by:

checkArgument in interface CommandInterface

Specified by:

checkArgument in class Command

Parameters:

inputArgument - the argument to check

Returns:

true if the input argument is null, false otherwise