Tugas Kelompok ke 4 (Minggu 9 / Sesi 14) 1. Berikut ini adalah Program untuk menampilkan data dalam bentuk pie chart, lakukan modifikasi pada program tersebut dengan menambahkan nilai bilangan yang bersesuaian dengan luasan area pie chart import import import import
java.awt.Color; java.awt.Graphics; java.awt.Graphics2D; java.awt.Rectangle;
import javax.swing.JComponent; import javax.swing.JFrame; class Slice { double value; Color color; public Slice(double value, Color color) { this.value = value; this.color = color; } } class MyComponent extends JComponent { Slice[] slices = { new Slice(5, Color.black), new Slice(33, Color.green), new Slice(20, Color.yellow), new Slice(15, Color.red) }; MyComponent() {} public void paint(Graphics g) { drawPie((Graphics2D) g, getBounds(), slices); } void drawPie(Graphics2D g, Rectangle area, Slice[] slices) { double total = 0.0D; for (int i = 0; i < slices.length; i++) { total += slices[i].value; } double curValue = 0.0D; int startAngle = 0; for (int i = 0; i < slices.length; i++) { startAngle = (int) (curValue * 360 / total); int arcAngle = (int) (slices[i].value * 360 / total); g.setColor(slices[i].color); g.fillArc(area.x, area.y, area.width, area.height, startAngle, arcAngle); curValue += slices[i].value; } } } public class Main { public static void main(String[] argv) { JFrame frame = new JFrame(); frame.getContentPane().add(new frame.getContentPane(). add(new MyComponent());
ISYS6304 - BUSINESS APPLICATION DEVELOPMENT
frame.setSize(300, 200); frame.setVisible(true); } }
ANSWER import java.awt.*; import javax.swing.*; public class bagan { public static void main(String [] argv) { JFrame frame = new JFrame(); frame.getContentPane ().add(new MyComponent ()); frame.setSize (600, 600); frame.setVisible (true);
} } //Mendefinisikan variable pembentuk Pie Chart class Slice { double value ; Color color ; public Slice (double value, Color color ) { this.value = value; this.color = color;
} } //Class tempat variable pemnghintung pembagian Pie Chart class MyComponent extends JComponent { Slice [] slices = { new Slice(33, Color.green), new Slice(5, Color.blue), new Slice(20, Color.yellow ), new Slice(15, Color.red)
}; MyComponent () {} public void paint(Graphics g ) { drawPie((Graphics2D ) g, getBounds (), slices ); Graphics2D g2 = (Graphics2D )g; Font red = new Font("Serif", Font.PLAIN , 30); g2.drawString ("Green slice = 33" , 250, 200); g2.setColor (Color.green); Font yellow = new Font("Serif" , Font.PLAIN, 30); g2.drawString ("Blue slice = 5" , 100, 275); g2.setColor (Color.blue); Font green = new Font("Serif", Font.PLAIN , 30);
ISYS6304 - BUSINESS APPLICATION DEVELOPMENT
g2.drawString ("Yellow slice = 20" , 175, 375); g2.setColor (Color.yellow); Font blue = new Font("Serif" , Font.PLAIN, 30); g2.drawString ("Red slice = 15" , 420, 400); g2.setColor (Color.red);
} void drawPie (Graphics2D g , Rectangle area , Slice [] slices ) { double total = 0.0D ; for (int i = 0; i < slices .length; i++) { total += slices[i].value;
} double curValue = 0.0D; int startAngle = 0; for (int i = 0; i < slices .length; i++) { startAngle = (int) (curValue * 360 / total ); int arcAngle = (int) (slices[i].value * 360 / total ); g.setColor (slices[i].color); g.fillArc(area .x, area.y, area.width , area.height , startAngle , arcAngle ); curValue += slices [i].value;
} } }
Output :
ISYS6304 - BUSINESS APPLICATION DEVELOPMENT
ISYS6304 - BUSINESS APPLICATION DEVELOPMENT
