Java Summary - Building Java Programs: A Back to Basics Approach - page 1114

Useful Methods of File Objects

Method Description

Deletes the given file

delete()

Indicates whether this file exists on the system

exists()

Returns the full path specifying the location of this file

getAbsolutePath()

Returns the name of this file as a String , without any path attached

getName()

Indicates whether this file represents a directory/folder on the system

isDirectory()

Indicates whether this file represents a file (nonfolder) on the system

isFile()

Returns the number of characters in this file

length()

Creates the directory represented by this file, if it does not exist

mkdirs()

Changes this file's name to be the given file's name

renameTo(file)

Useful Methods of Graphics Objects

Method Description

Draws a line between the points ( x1, y1 ) and
( x2, y2 )

drawLine(x1, y1, x2, y2)

Draws the outline of the largest oval that fits within
the specified rectangle

drawOval(x, y, width, height)

Draws the outline of the specified rectangle

drawRect(x, y, width, height)

Draws the given text with its lower-left corner at
( x, y )

drawString(message, x, y)

Fills the largest oval that fits within the specified
rectangle using the current color

fillOval(x, y, width, height)

Fills the specified rectangle using the current color

fillRect(x, y, width, height)

Sets this graphics context's current color to the
specified color (all subsequent graphics operations
using this graphics context use this specified color)

setColor(color)

Sets this graphics context's current font to the
specified font (all subsequent strings drawn using
this graphics context use this specified font)

setFont(font)