Graphics

Method or Constructor Purpose
void drawArc(int x, int y, int width, int height, int startAngle, int arcAngle) Draws the outline of a circular or elliptical arc covering the specified rectangle.
void drawLine(int x1, int y1, int x2, int y2) Draws a line, using the current color, between the points (x1, y1) and (x2, y2) in this graphics.
void drawOval(int x, int y, int width, int height) Draws the outline of an oval.
void drawString(String str, int x, int y) Draws the text given by the specified string, using this graphics context's current font and color.
void fillArc(int x, int y, int width, int height, int startAngle, int arcAngle) Fills a circular or elliptical arc covering the specified rectangle.
void fillOval(int x, int y, int width, int height) Fills an oval bounded by the specified rectangle with the current color.
void fillRect(int x, int y, int width, int height) Fills the specified rectangle.
Color getColor(), void setColor(Color) Gets and sets this graphics context's current color.
Font, getFont(),void setFont(Font font) Sets this graphics context's font to the specified font.

Color

Method or Constructor Purpose
Color(float r, float g, float b) , Color(int r, int g, int b) Specific the red, green, blue component.
Color brighter(), Color darker() Creates a new Color that is a brighter (or darker) version of this Color.

Font

Method or Constructor Purpose
Font(String name, int style, int size) Creates a new Font from the specified name, style and point size.
name - the font name. This can be a logical font name or a font face name.
style - the style constant for the Font The style argument is an integer bitmask that may be PLAIN, or a bitwise union of BOLD and/or ITALIC (for example, ITALIC or BOLD|ITALIC).
size - the point size of the Font.

Componenet

Color getForeground(), void setForeground(Color c), Color getBackground(), void setBackground(Color c) Gets and sets the background/foreground color of this component.
void setSize(int width, int height) Resizes this component so that it has width width and height.

Buttons

Setting or Getting the Button's Contents
Method or Constructor Purpose
JButton(String, Icon)
JButton(String)
JButton(Icon)
JButton() 		Create a JButton instance, initializing it to have the specified text/image.
void setText(String)
String getText() 		Set or get the text displayed by the button.
void setIcon(Icon)
Icon getIcon() 		Set or get the image displayed by the button when the button isn't selected or pressed.
void setDisabledIcon(Icon)
Icon getDisabledIcon() 		Set or get the image displayed by the button when it's disabled. If you don't specify a disabled image, then the look and feel creates one by manipulating the default image.
void setPressedIcon(Icon)
Icon getPressedIcon() 		Set or get the image displayed by the button when it's being pressed.
void setSelectedIcon(Icon)
Icon getSelectedIcon()
void setDisabledSelectedIcon(Icon)
Icon getDisabledSelectedIcon() 		Set or get the image displayed by the button when it's selected. If you don't specify a disabled selected image, then the look and feel creates one by manipulating the selected image.
setRolloverEnabled(boolean)
boolean getRolloverEnabled()
void setRolloverIcon(Icon)
Icon getRolloverIcon()
void setRolloverSelectedIcon(Icon)
Icon getRolloverSelectedIcon() 		Use setRolloverEnabled(true) and setRolloverIcon(someIcon) to make the button display the specified icon when the cursor passes over it.

Fine Tuning the Button's Appearance
Method or Constructor Purpose
void setHorizontalAlignment(int)
void setVerticalAlignment(int)
int getHorizontalAlignment()
int getVerticalAlignment() 		Set or get where in the button its contents should be placed. The AbstractButton class allows any one of the following values for horizontal alignment: LEFT, CENTER (the default), and RIGHT. For vertical alignment: TOP, CENTER (the default), and BOTTOM.
void setHorizontalTextPosition(int)
void setVerticalTextPosition(int)
int getHorizontalTextPosition()
int getVerticalTextPosition() 		Set or get where the button's text should be placed, relative to the button's image. The AbstractButton class allows any one of the following values for horizontal position: LEFT, CENTER, and RIGHT (the default). For vertical position: TOP, CENTER (the default), and BOTTOM.

Setting or Getting the Label's Contents
Method or Constructor Purpose
JLabel(Icon)
JLabel(Icon, int)
JLabel(String)
JLabel(String, Icon, int)
JLabel(String, int)
JLabel() 		Create a JLabel instance, initializing it to have the specified text/image/alignment. The int argument specifies the horizontal alignment of the label's contents within its drawing area. The horizontal alignment must be one of the following constants defined in the SwingConstants(in the API reference documentation) interface (which JLabel implements): LEFT, CENTER, RIGHT, LEADING, or TRAILING.
void setText(String)
String getText() 		Set or get the text displayed by the label.
void setIcon(Icon)
Icon getIcon() 		Set or get the image displayed by the label.

Fine Tuning the Label's Appearance
Method Purpose
void setHorizontalAlignment(int)
void setVerticalAlignment(int)
int getHorizontalAlignment()
int getVerticalAlignment() 		Set or get where in the label its contents should be placed. The SwingConstants(in the API reference documentation) interface defines five possible values for horizontal alignment: LEFT (the default for text-only labels), CENTER (the default for image-only labels), RIGHT, LEADING, and TRAILING. For vertical alignment: TOP, CENTER (the default), and BOTTOM.
void setHorizontalTextPosition(int)
void setVerticalTextPosition(int)
int getHorizontalTextPosition()
int getVerticalTextPosition() 		Set or get where the button's text should be placed, relative to the button's image. The SwingConstants(in the API reference documentation) interface defines three possible values for horizontal position: LEFT, CENTER, and RIGHT (the default). For vertical position: TOP, CENTER (the default), and BOTTOM.

FlowLayout

Method or Constructor Purpose
public FlowLayout(), public FlowLayout(int alignment), public FlowLayout(int alignment, int horizontalGap, int verticalGap) The alignment argument must have the value FlowLayout.LEFT, FlowLayout.CENTER, or FlowLayout.RIGHT. The horizontalGap and verticalGap arguments specify the number of pixels to put between components. If you don't specify a gap value, FlowLayout uses 5 for the default gap value.

BorderLayout

Method or Constructor Purpose
BorderLayout(), BorderLayout(int horizontalGap, int verticalGap) Constructs a border layout with the specified gaps between components. The default is 0.

GridLayout

Method or Constructor Purpose
public GridLayout(int rows, int columns) public GridLayout(int rows, int columns, int horizontalGap, int verticalGap) At least one of the rows and columns arguments must be nonzero. The horizontalGap and verticalGap arguments to the second constructor allow you to specify the number of pixels between cells. If you don't specify gaps, their values default to zero.

String

Methods for changing strings

 
String concat(String str)
String replace(char oldChar, char newChar)
String toLowerCase()
 
String toUpperCase()
String trim()

Methods for searching

 
int indexOf(int ch)
int indexOf(int ch, int fromIndex)
int lastIndexOf(int ch)
int lastIndexOf(int ch, int fromIndex)
 
int indexOf(String str)
int indexOf(String str, int fromIndex)
int lastIndexOf(String str)
int lastIndexOf(String str,int fromIndex)




Methods for testing

 
boolean startsWith(String prefix, int toffset)
boolean startsWith(String prefix)
 
boolean endsWith(String suffix)
boolean equalsIgnoreCase(String anotherString)

Methods for accessing

 
String substring(int beginIndex)
String substring(int beginIndex, int endIndex)
 
char charAt(int index)
public char[] toCharArray()