Class FibreModule

java.lang.Object
  FibreModule

 class FibreModule
extends java.lang.Object

The class FibreModule contains methods to perform various operations allowing access to all parameters of the fibre module, and it's associated fibres. It also provides methods to set parameters of the fibre module, and to methods to provide persistence of the data relating to the fibre module, through the use of disk files.

Field Summary

private double	bufferFactor Buffer factor around fibres applies a 10% buffer around all fibre dimensions
private int	ButtonLength
private int	ButtonWidth
private int	CircleRadius
private int	FIBRE_MAXIMUM_POSITION_ERROR The maximum allowable positioning error for any fibre.
private int	FIBRE_MINIMUM_POSITION_SEPARATION
private int	FibreLength
private java.lang.String	FibreModuleDataFileName
private java.lang.String	FibreModuleErrorDataFileName
private java.lang.String	FibreModuleName
private Fibre[]	Fibres The array of fibres in the fibre module
private double	FibreSize
private java.lang.String	LARGE_FIBRE_MODULE_CONFIGURATION_FILE
private java.lang.String	LARGE_FIBRE_MODULE_ERROR_FILE
private int	LoadRadius
private int	NoAcquisition
private double	NonRadialAngle
private int	NoPivots
private NoticeBoard	noticeBoard
private int	NoUnused
private int	ParkRadius
private int	PivotRadius
private double	scale0 0th order term of plate scale
private double	scale1 1st order term of plate scale
private double	scale2 2nd order term of plate scale
private java.lang.String	SMALL_FIBRE_MODULE_CONFIGURATION_FILE
private java.lang.String	SMALL_FIBRE_MODULE_ERROR_FILE
private int	TubeWidth
private java.lang.String	WHT_LARGE_FIBRE_MODULE_CONFIGURATION_FILE
private java.lang.String	WHT_LARGE_FIBRE_MODULE_ERROR_FILE
private java.lang.String	WHT_PRIME_DISTORTION_FILE
private java.lang.String	WHT_SMALL_FIBRE_MODULE_CONFIGURATION_FILE
private java.lang.String	WHT_SMALL_FIBRE_MODULE_ERROR_FILE
private java.lang.String	WhtFibreModuleDataFileName
private java.lang.String	WhtFibreModuleErrorDataFileName

Constructor Summary

FibreModule()
Constructor

Method Summary

private void	check() Check that all of the fibres in the fibre module are in valid positions
private void	closeFile(java.io.BufferedReader theFile)
private java.awt.Point	convert_xy(java.lang.String RA, java.lang.String Dec, java.lang.String Equinox, java.lang.String RA_centre, java.lang.String Dec_centre, java.lang.String LASidTime, java.lang.String SkyPA, java.lang.String UTDate, double scale0, double scale1, double scale2) Native method to RA and Dec coordinates to an AF2 XY cordinate
private void	copy(java.lang.String srcFilename, java.lang.String dstFilename) Copy a file
private double	extractDoubleFromInputLine(java.io.BufferedReader input)
private java.lang.String	extractFirstWordFromInputLine(java.io.BufferedReader input)
private int	extractIntFromInputLine(java.io.BufferedReader input)
private java.lang.String	extractStringFromInputLine(java.io.BufferedReader input)
private double	getBufferFactor() Get the buffer factor around the fibres
(package private) int	getButtonLength() Get the fibre button length
(package private) int	getButtonLengthBuffered() Get the fibre button length with a buffer applied
(package private) int	getButtonWidth() Get the fibre button width
(package private) int	getButtonWidthBuffered() Get the fibre button width with a buffer applied
private int	getCircleRadius() Get the circle radius of the fibre module
private void	getDistortionData(java.lang.String distortionDataFile) Get the field distortion data from the distortion file
(package private) Fibre	getFibre(int FibreNumber) Get a fibre by it's fibre number
(package private) java.awt.Point	getFibreCreepOffset(Fibre theFibre) Get the fibre creep error VC
(package private) double	getFibreDistance(Fibre fibre1, Fibre fibre2) Get the distance between 2 fibres
(package private) int	getFibreLength() Get the length of a fibre in the fibre module
private void	getFibreModuleData(java.lang.String fibreDataFile) Get the fibre data file and extract the current fibre information.
private void	getFibreModuleErrorData(java.lang.String fibreErrorDataFile) Get the learnt values of putdown offset error and creep error from the fibre module's error table
private java.awt.Point	getFibreOffset(Fibre theFibre) Get the learnt fibre putdown error offset VE
(package private) java.awt.Point	getFibrePutdownError(Fibre theFibre)
(package private) java.awt.Point	getFibrePutdownOffset(Fibre theFibre) Get the required putdown offset for a fibre.
(package private) java.awt.Point	getFixedFibreFinOffset(int FibreNumber) Get the fixed offset between the fibre and the fin
(package private) double	getGuideFibreRmsError() Get the RMS positioning error of the guide fibres
private int	getLoadRadius() Get the load radius of the fibre module
(package private) Fibre	getLostFibre() Get a lost fibre
(package private) java.lang.String	getName() Get the name of the fibre module
(package private) Fibre	getNearestFibre(Fibre theFibre) Get the nearest fibre to a fibre
(package private) Fibre	getNearestFibre(java.awt.Point thePosition) Get the nearest fibre to a position
private double	getNonRadialAngle() Get the maximum non radial angle allowed for each fibre
(package private) double	getNonRadialAngleInArcmins() Get the maximum non radial angle allowed for each fibre
(package private) int	getNumberOfDisabledFibres() Get the number of disabled fibres in the fibre module
(package private) int	getNumberOfFiducialFibres() Get the number of fiducial fibres in the fibre module
(package private) int	getNumberOfObjectFibres() Get the number of object fibres in the fibre module
(package private) int	getNumberOfPivots() Get the number of pivots in the fibre module
(package private) int	getNumberOfUnsusedFibres() Get the number of unused fibres in the fibre module
private int	getParkRadius() Get the park radius of the fibre module
private int	getPivotRadius() Get the pivot radius of the fibre module
private double	getScale0() Get the 0th order term of plate scale
private double	getScale1() Get the 1st order term of plate scale
private double	getScale2() Get the 2nd order term of plate scale
(package private) double	getScienceFibreRmsError() Get the RMS positioning error of the science fibres
(package private) int	getTubeWidth() Get the fibre tube width
(package private) int	getTubeWidthBuffered() Get the fibre tube width with a buffer applied
private boolean	hasFibre(int theFibreNumber) Check whether a fibre exists
(package private) boolean	isCloseToAnotherFibre(Fibre thisFibre) Ask whether a fibre is too close to another fibre
(package private) boolean	isFibreLost() Determine if a fibre is currently lost
(package private) boolean	isFibreMovementRequired(Fibre theFibre, Fibre theTarget, int tolerance) Check whether movement of a fibre is required
private boolean	isLengthOK(Fibre thisFibre) Check that the length of the fibre is OK
(package private) boolean	isNotColliding(Fibre thisFibre) Check that a fibre does not collide with any other fibres in the module
(package private) boolean	isPositionOK(Fibre thisFibre) Check that the position of a fibre is valid
private boolean	isRadial(Fibre thisFibre) Check that the fibre is within it's radial angle tolerance
(package private) boolean	isWithinField(Fibre thisFibre) Check that the fibre is within the observable field
private boolean	isWithinLoadRing(Fibre thisFibre) Check that the fibre is within the load ring
private java.io.BufferedReader	openFile(java.lang.String filename)
private java.lang.String	rightAlign(long number, int FieldSize) Right align a number
private void	saveFibreModuleErrorData()
private void	saveFibreState(Fibre theFibre)
(package private) void	saveModuleState()
(package private) void	setCirclePosition(Fibre thisFibre)
(package private) void	setFibreCreepOffset(Fibre theFibre, java.awt.Point gripperOpenPosition, java.awt.Point gripperClosedPosition) Set the fibre's creep offset vector
(package private) void	setFibreErrorOffset(Fibre theFibre, java.awt.Point gripperClosedPosition, java.awt.Point robotPosition) Set the fibre's error offset vector
(package private) void	setFibrePosition(Fibre thisFibre, java.awt.Point thisPosition) Set the fibre's new position
(package private) void	setFibrePosition(TargetFibre theTargetFibre, Configuration thisConfiguration) Set a target fibre's position for a configuration
(package private) void	setFibrePosition(TargetFibre theTargetFibre, java.awt.Point thisPosition) Set the target fibre's position
(package private) void	setFibrePutdownError(Fibre theFibre, java.awt.Point theFibrePosition, java.awt.Point theRobotPosition)
(package private) void	setLoadRingPosition() Set the position of all of the fibres in the fibre module to the position of the load ring
(package private) void	setLoadRingPosition(Fibre thisFibre) Set the position of a fibre to the position of the load ring
(package private) void	setParkPosition(Fibre thisFibre)
(package private) void	setPositionNoMove(Fibre thisFibre)
private void	synchroniseFiles(java.lang.String fileName1, java.lang.String fileName2) Synchronise two copies of a file Copy the newer file to the older file
java.lang.String	toString() Returns a string representation of the object
(package private) void	updateNoticeBoard() Update the parameter noticeboard with the fibre module details

Methods inherited from class java.lang.Object

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

Field Detail

SMALL_FIBRE_MODULE_CONFIGURATION_FILE

private final java.lang.String SMALL_FIBRE_MODULE_CONFIGURATION_FILE

SMALL_FIBRE_MODULE_ERROR_FILE

private final java.lang.String SMALL_FIBRE_MODULE_ERROR_FILE

LARGE_FIBRE_MODULE_CONFIGURATION_FILE

private final java.lang.String LARGE_FIBRE_MODULE_CONFIGURATION_FILE

LARGE_FIBRE_MODULE_ERROR_FILE

private final java.lang.String LARGE_FIBRE_MODULE_ERROR_FILE

WHT_SMALL_FIBRE_MODULE_CONFIGURATION_FILE

private final java.lang.String WHT_SMALL_FIBRE_MODULE_CONFIGURATION_FILE

See Also:

Constant Field Values

WHT_SMALL_FIBRE_MODULE_ERROR_FILE

private final java.lang.String WHT_SMALL_FIBRE_MODULE_ERROR_FILE

See Also:

Constant Field Values

WHT_LARGE_FIBRE_MODULE_CONFIGURATION_FILE

private final java.lang.String WHT_LARGE_FIBRE_MODULE_CONFIGURATION_FILE

See Also:

Constant Field Values

WHT_LARGE_FIBRE_MODULE_ERROR_FILE

private final java.lang.String WHT_LARGE_FIBRE_MODULE_ERROR_FILE

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Constant Field Values

WHT_PRIME_DISTORTION_FILE

private final java.lang.String WHT_PRIME_DISTORTION_FILE

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Constant Field Values

FIBRE_MAXIMUM_POSITION_ERROR

private final int FIBRE_MAXIMUM_POSITION_ERROR

The maximum allowable positioning error for any fibre.

See Also:

Constant Field Values

FIBRE_MINIMUM_POSITION_SEPARATION

private final int FIBRE_MINIMUM_POSITION_SEPARATION

See Also:

Constant Field Values

bufferFactor

private final double bufferFactor

Buffer factor around fibres applies a 10% buffer around all fibre dimensions

See Also:

Constant Field Values

FibreModuleName

private java.lang.String FibreModuleName

FibreModuleDataFileName

private java.lang.String FibreModuleDataFileName

FibreModuleErrorDataFileName

private java.lang.String FibreModuleErrorDataFileName

WhtFibreModuleDataFileName

private java.lang.String WhtFibreModuleDataFileName

WhtFibreModuleErrorDataFileName

private java.lang.String WhtFibreModuleErrorDataFileName

NoPivots

private int NoPivots

NoAcquisition

private int NoAcquisition

NoUnused

private int NoUnused

NonRadialAngle

private double NonRadialAngle

FibreLength

private int FibreLength

TubeWidth

private int TubeWidth

ButtonWidth

private int ButtonWidth

ButtonLength

private int ButtonLength

FibreSize

private double FibreSize

PivotRadius

private int PivotRadius

ParkRadius

private int ParkRadius

LoadRadius

private int LoadRadius

CircleRadius

private final int CircleRadius

See Also:

Constant Field Values

scale0

private double scale0

0th order term of plate scale

scale1

private double scale1

1st order term of plate scale

scale2

private double scale2

2nd order term of plate scale

noticeBoard

private NoticeBoard noticeBoard

Fibres

private Fibre[] Fibres

The array of fibres in the fibre module

Constructor Detail

FibreModule

FibreModule()

Constructor

Method Detail

convert_xy

private java.awt.Point convert_xy(java.lang.String RA,
                                  java.lang.String Dec,
                                  java.lang.String Equinox,
                                  java.lang.String RA_centre,
                                  java.lang.String Dec_centre,
                                  java.lang.String LASidTime,
                                  java.lang.String SkyPA,
                                  java.lang.String UTDate,
                                  double scale0,
                                  double scale1,
                                  double scale2)

Native method to RA and Dec coordinates to an AF2 XY cordinate

Parameters:

RA - The RA of the object

Dec - The Dec of the object

Equinox - The Equinox

RA_centre - The RA centre of the field

Dec_centre - The Dec centre of the field

LASidTime - The sidereal time

SkyPA - The Sky PA

UTDate - The UT date

scale0 - 0th order term of plate scale

scale1 - 1st order term of plate scale

scale2 - 2nd order term of plate scale

Returns:

The point representing the AF2 XY coordinates of the object

check

private void check()

Check that all of the fibres in the fibre module are in valid positions

getDistortionData

private void getDistortionData(java.lang.String distortionDataFile)

Get the field distortion data from the distortion file

Parameters:

distortionDataFile - The name of the distortion file

getFibreModuleData

private void getFibreModuleData(java.lang.String fibreDataFile)

Get the fibre data file and extract the current fibre information.

Parameters:

fibreDataFile - The name of the fibre module data file (xxxxx_fibres.dat)

getFibreModuleErrorData

private void getFibreModuleErrorData(java.lang.String fibreErrorDataFile)

Get the learnt values of putdown offset error and creep error from the fibre module's error table

Parameters:

fibreErrorDataFile - The path to the fibre module's error table file

getName

java.lang.String getName()

Get the name of the fibre module

Returns:

the name of the fibre module

getScale0

private double getScale0()

Get the 0th order term of plate scale

Returns:

the 0th order term of plate scale

getScale1

private double getScale1()

Get the 1st order term of plate scale

Returns:

the 1st order term of plate scale

getScale2

private double getScale2()

Get the 2nd order term of plate scale

Returns:

the 2nd order term of plate scale

getLoadRadius

private int getLoadRadius()

Get the load radius of the fibre module

Returns:

the load radius of the fibre module

getParkRadius

private int getParkRadius()

Get the park radius of the fibre module

Returns:

the park radius of the fibre module

getPivotRadius

private int getPivotRadius()

Get the pivot radius of the fibre module

Returns:

the pivot radius of the fibre module

getCircleRadius

private int getCircleRadius()

Get the circle radius of the fibre module

Returns:

the circle radius of the fibre module

getNonRadialAngle

private double getNonRadialAngle()

Get the maximum non radial angle allowed for each fibre

Returns:

The maximum non radial angle allowed for each fibre (in degrees)

getNonRadialAngleInArcmins

double getNonRadialAngleInArcmins()

Get the maximum non radial angle allowed for each fibre

Returns:

The maximum non radial angle allowed for each fibre (in arcmins)

getFibreLength

int getFibreLength()

Get the length of a fibre in the fibre module

Returns:

the length of a fibre in the fibre module

getBufferFactor

private double getBufferFactor()

Get the buffer factor around the fibres

Returns:

the buffer factor around the fibres

getButtonWidth

int getButtonWidth()

Get the fibre button width

Returns:

the fibre button width

getButtonLength

int getButtonLength()

Get the fibre button length

Returns:

the fibre button length

getTubeWidth

int getTubeWidth()

Get the fibre tube width

Returns:

the fibre tube width

getButtonWidthBuffered

int getButtonWidthBuffered()

Get the fibre button width with a buffer applied

Returns:

the fibre button width with a buffer applied

getButtonLengthBuffered

int getButtonLengthBuffered()

Get the fibre button length with a buffer applied

Returns:

the fibre button length with a buffer applied

getTubeWidthBuffered

int getTubeWidthBuffered()

Get the fibre tube width with a buffer applied

Returns:

the fibre tube width with a buffer applied

getNumberOfPivots

int getNumberOfPivots()

Get the number of pivots in the fibre module

Returns:

the number of pivots in the fibre module

getNumberOfUnsusedFibres

int getNumberOfUnsusedFibres()

Get the number of unused fibres in the fibre module

Returns:

the number of unused fibres in the fibre module

getNumberOfFiducialFibres

int getNumberOfFiducialFibres()

Get the number of fiducial fibres in the fibre module

Returns:

the number of fiducial fibres in the fibre module

getNumberOfObjectFibres

int getNumberOfObjectFibres()

Get the number of object fibres in the fibre module

Returns:

the number of object fibres in the fibre module

getNumberOfDisabledFibres

int getNumberOfDisabledFibres()

Get the number of disabled fibres in the fibre module

Returns:

the number of disabled fibres in the fibre module

getFibre

Fibre getFibre(int FibreNumber)

Get a fibre by it's fibre number

Parameters:

FibreNumber - The number of the fibre

Returns:

The fibre

getLostFibre

Fibre getLostFibre()

Get a lost fibre

Returns:

The lost fibre

getNearestFibre

Fibre getNearestFibre(java.awt.Point thePosition)

Get the nearest fibre to a position

Parameters:

thePosition - The position

Returns:

The nearest fibre to the position

getNearestFibre

Fibre getNearestFibre(Fibre theFibre)

Get the nearest fibre to a fibre

Parameters:

theFibre - The fibre

Returns:

The nearest fibre

getFixedFibreFinOffset

java.awt.Point getFixedFibreFinOffset(int FibreNumber)

Get the fixed offset between the fibre and the fin

Parameters:

FibreNumber - The number of the fibre

Returns:

The fixed offset between the fin and the fibre

getFibrePutdownOffset

java.awt.Point getFibrePutdownOffset(Fibre theFibre)

Get the required putdown offset for a fibre. This is the negative vector sum of the fibre error offset, and the creep offset

Parameters:

theFibre - The fibre

Returns:

The required putdown offset

getFibreOffset

private java.awt.Point getFibreOffset(Fibre theFibre)

Get the learnt fibre putdown error offset VE

Parameters:

theFibre - The fibre

Returns:

The learnt putdown error for the fibre

getFibreCreepOffset

java.awt.Point getFibreCreepOffset(Fibre theFibre)

Get the fibre creep error VC

Parameters:

theFibre - The fibre

Returns:

The fibre's creep error

setFibreCreepOffset

void setFibreCreepOffset(Fibre theFibre,
                         java.awt.Point gripperOpenPosition,
                         java.awt.Point gripperClosedPosition)

Set the fibre's creep offset vector

Parameters:

theFibre - The fibre

gripperOpenPosition - The position of the fibre with the gripper open

gripperClosedPosition - The position of the fibre with the gripper closed

setFibreErrorOffset

void setFibreErrorOffset(Fibre theFibre,
                         java.awt.Point gripperClosedPosition,
                         java.awt.Point robotPosition)

Set the fibre's error offset vector

Parameters:

theFibre - The fibre

gripperClosedPosition - The position of the fibre with the gripper closed

robotPosition - The position of the robot

setFibrePutdownError

void setFibrePutdownError(Fibre theFibre,
                          java.awt.Point theFibrePosition,
                          java.awt.Point theRobotPosition)

getFibrePutdownError

java.awt.Point getFibrePutdownError(Fibre theFibre)

getFibreDistance

double getFibreDistance(Fibre fibre1,
                        Fibre fibre2)

Get the distance between 2 fibres

Parameters:

fibre1 - Fibre 1

fibre2 - Fibre 2

Returns:

The distance between the fibres

getScienceFibreRmsError

double getScienceFibreRmsError()

Get the RMS positioning error of the science fibres

Returns:

The RMS positioning error of the science fibres

getGuideFibreRmsError

double getGuideFibreRmsError()

Get the RMS positioning error of the guide fibres

Returns:

The RMS positioning error of the guide fibres

isFibreMovementRequired

boolean isFibreMovementRequired(Fibre theFibre,
                                Fibre theTarget,
                                int tolerance)

Check whether movement of a fibre is required

Parameters:

theFibre - The fibre to be moved

theTarget - The target for the fibre

tolerance - The required tolerance in microns

Returns:

Whether a fibre movement is required

isPositionOK

boolean isPositionOK(Fibre thisFibre)

Check that the position of a fibre is valid

Parameters:

thisFibre - The fibre to be checked

Returns:

Whether the position of a fibre is valid

isNotColliding

boolean isNotColliding(Fibre thisFibre)

Check that a fibre does not collide with any other fibres in the module

Parameters:

thisFibre - The fibre to be checked

Returns:

Result of fibre collision check

isCloseToAnotherFibre

boolean isCloseToAnotherFibre(Fibre thisFibre)

Ask whether a fibre is too close to another fibre

Parameters:

thisFibre - The fibre

Returns:

Boolean to indicate whether the fibre is too close to another fibre

isRadial

private boolean isRadial(Fibre thisFibre)

Check that the fibre is within it's radial angle tolerance

Parameters:

thisFibre - The fibre to be checked

Returns:

Value to indicate whether the fibre is within it's radial angle tolerance

isFibreLost

boolean isFibreLost()

Determine if a fibre is currently lost

Returns:

Boolean to indicate whether a fibre is lost

hasFibre

private boolean hasFibre(int theFibreNumber)

Check whether a fibre exists

Parameters:

theFibreNumber - The number of the fibre

Returns:

Whether the fibre exists

isLengthOK

private boolean isLengthOK(Fibre thisFibre)

Check that the length of the fibre is OK

Parameters:

thisFibre - The fibre to be checked

Returns:

Value to indicate whether the length of the fibre is OK

isWithinLoadRing

private boolean isWithinLoadRing(Fibre thisFibre)

Check that the fibre is within the load ring

Parameters:

thisFibre - The fibre to be checked

Returns:

Value to indicate whether the fibre is within the load ring

isWithinField

boolean isWithinField(Fibre thisFibre)

Check that the fibre is within the observable field

Parameters:

thisFibre - The fibre to be checked

Returns:

Value to indicate whether the fibre is within the observable field

setFibrePosition

void setFibrePosition(Fibre thisFibre,
                      java.awt.Point thisPosition)

Set the fibre's new position

Parameters:

thisFibre - The fibre

thisPosition - The fibre's position

setFibrePosition

void setFibrePosition(TargetFibre theTargetFibre,
                      java.awt.Point thisPosition)

Set the target fibre's position

Parameters:

theTargetFibre - The target fibre

thisPosition - The target fibre's position

setFibrePosition

void setFibrePosition(TargetFibre theTargetFibre,
                      Configuration thisConfiguration)

Set a target fibre's position for a configuration

Parameters:

theTargetFibre - The target fibre

thisConfiguration - The configuration

setLoadRingPosition

void setLoadRingPosition(Fibre thisFibre)

Set the position of a fibre to the position of the load ring

Parameters:

thisFibre - The fibre to be marked as positioned in the load ring

setLoadRingPosition

void setLoadRingPosition()

Set the position of all of the fibres in the fibre module to the position of the load ring

setParkPosition

void setParkPosition(Fibre thisFibre)

setCirclePosition

void setCirclePosition(Fibre thisFibre)

setPositionNoMove

void setPositionNoMove(Fibre thisFibre)

extractDoubleFromInputLine

private double extractDoubleFromInputLine(java.io.BufferedReader input)

extractIntFromInputLine

private int extractIntFromInputLine(java.io.BufferedReader input)

extractFirstWordFromInputLine

private java.lang.String extractFirstWordFromInputLine(java.io.BufferedReader input)

extractStringFromInputLine

private java.lang.String extractStringFromInputLine(java.io.BufferedReader input)

openFile

private java.io.BufferedReader openFile(java.lang.String filename)

closeFile

private void closeFile(java.io.BufferedReader theFile)

saveModuleState

void saveModuleState()

updateNoticeBoard

void updateNoticeBoard()

Update the parameter noticeboard with the fibre module details

saveFibreState

private void saveFibreState(Fibre theFibre)

saveFibreModuleErrorData

private void saveFibreModuleErrorData()

rightAlign

private java.lang.String rightAlign(long number,
                                    int FieldSize)

Right align a number

Parameters:

number - The number to be right aligned

FieldSize - The size of the string field

Returns:

The right aligned number

copy

private void copy(java.lang.String srcFilename,
                  java.lang.String dstFilename)

Copy a file

Parameters:

srcFilename - The src file name

dstFilename - The destination file name

synchroniseFiles

private void synchroniseFiles(java.lang.String fileName1,
                              java.lang.String fileName2)

Synchronise two copies of a file Copy the newer file to the older file

Parameters:

fileName1 - Name of file1

fileName2 - Name of file2

toString

public java.lang.String toString()

Returns a string representation of the object

Overrides:

toString in class java.lang.Object

Returns:

The string representation of the object