Check The folder saying Lab 1 that where you will find the questions. Rest are help
Write a program that inputs (use JOptionPane.showInputDialog method) four numbers and graphs them as a pie chart. Use class Arc2D.Double and method fill of class Graphics2D to perform the drawing. Draw each piece of the pie in a separate color.
Given program (Lab_1_2_start_Up) is an application that allows the user to select a shape from a JComboBox and draws it 20 times with random locations and dimensions in method paintComponent. The first item in the JComboBox should be the default shape that is displayed the first time paintComponent is called. (Screenshot 1 & 2)
Lab_1_1_Help/Shapes.java
Lab_1_1_Help/Shapes.java
// Lab 1 Question 1 help
import
javax
.
swing
.
*
;
public
class
Shapes
{
// execute application
public
static
void
main
(
String
[]
args
)
{
int
length
;
int
width
;
// create frame for ShapesJPanel
JFrame
frame
=
new
JFrame
(
"Drawing 2D shapes"
);
frame
.
setDefaultCloseOperation
(
JFrame
.
EXIT_ON_CLOSE
);
// input the length and width
length
=
Integer
.
parseInt
(
JOptionPane
.
showInputDialog
(
frame
,
"Please enter the length:"
));
width
=
Integer
.
parseInt
(
JOptionPane
.
showInputDialog
(
frame
,
"Please enter the width:"
));
// create ShapesJPanel
ShapesJPanel
shapesJPanel
=
new
ShapesJPanel
(
length
,
width
);
frame
.
add
(
shapesJPanel
);
frame
.
setSize
(
425
,
200
);
frame
.
setVisible
(
true
);
}
}
// end class Shapes
Lab_1_1_Help/ShapesJPanel.java
Lab_1_1_Help/ShapesJPanel.java
// Lab 1 Question 1 help
import
java
.
awt
.
*
;
import
java
.
awt
.
event
.
ActionEvent
;
import
java
.
awt
.
event
.
ActionListener
;
import
java
.
awt
.
geom
.
Rectangle2D
;
import
javax
.
swing
.
*
;
public
class
ShapesJPanel
extends
JPanel
{
private
int
length
;
private
int
width
;
private
JButton
exitJButton
;
//constructor to receive inputs
public
ShapesJPanel
(
int
length
,
int
width
){
this
.
length
=
length
;
this
.
width
=
width
;
exitJButton
=
new
JButton
(
"Exit"
);
exitJButton
.
addActionListener
(
new
ActionListener
()
{
@
Override
public
void
actionPerformed
(
ActionEvent
e
)
{
int
result
=
JOptionPane
.
showConfirmDialog
(
null
,
"Are you Sure?"
);
System
.
out
.
println
(
result
);
if
(
result
==
0
){
JOptionPane
.
showMessageDialog
(
null
,
"Thank you for using this program"
,
"Bye!"
,
JOptionPane
.
PLAIN_MESSAGE
);
//dispose();
System
.
exit
(
0
);}
}
}
);
this
.
setLayout
(
new
BorderLayout
());
this
.
add
(
exitJButton
,
BorderLayout
.
SOUTH
);
}
// draw shapes with Java 2D API
@
Override
public
void
paintComponent
(
Graphics
g
)
{
super
.
paintComponent
(
g
);
Graphics2D
g2d
=
(
Graphics2D
)
g
;
// cast g to Graphics2D
// draw 2D rectangle in red
g2d
.
setPaint
(
Color
.
RED
);
g2d
.
setStroke
(
new
BasicStroke
(
10.0f
));
g2d
.
draw
(
new
Rectangle2D
.
Double
(
80
,
30
,
width
,
length
));
}
}
// end class ShapesJPanel
