Question

For the final project, complete an independent application that includes all requirements listed in the rubric. You can use applications from the book as models but do not copy exactly. Compile on ideone or an IDE and screenshot the results with a timestamp showing. I really need help creating a code that meets all requirements

Application written in Java	20
Application includes constant	5
App incudes 4 or more variables	5
App includes an array of 5 or more items	10
App includes one or more strings	5
App includes a loop	10
App produces output with explanatory text	10
App includes one or more event handlers	10
Paragraph or more on experience creating app	5
Screenshot submitted of code in compiler with a timestamp	10
Document submitted with explanations of code	10
Override grade: Screenshot w/timestamp OR explanatory document not submitted

Answer 1

JAVA CODE:

import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
*
* @author shubhamtunwal
*/
public class NewJFrame extends javax.swing.JFrame {

/**
* Creates new form NewJFrame
*/
public static final double pi = 3.14;

public NewJFrame() {
initComponents();
}

@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {

jScrollPane1 = new javax.swing.JScrollPane();
jTree1 = new javax.swing.JTree();
jb = new javax.swing.JButton();
jScrollPane2 = new javax.swing.JScrollPane();
jta = new javax.swing.JTextArea();

jScrollPane1.setViewportView(jTree1);

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

jb.setText("Calculate Area");
jb.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbActionPerformed(evt);
}
});

jta.setColumns(20);
jta.setRows(5);
jScrollPane2.setViewportView(jta);

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jScrollPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 613, Short.MAX_VALUE)
.addContainerGap())
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jb, javax.swing.GroupLayout.PREFERRED_SIZE, 160, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(20, 20, 20)
.addComponent(jb)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jScrollPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 195, Short.MAX_VALUE)
.addGap(24, 24, 24))
);

pack();
}// </editor-fold>

private void jbActionPerformed(java.awt.event.ActionEvent evt) {   

// This code is inside the event handler which is a button
  
  
  
// 5 variables
int area_circle1;
int area_circle2;
int area_circle3;
int area_circle4;
int area_circle5;

//array containing radius of 5 circle as its items
int radii[] = new int[]{4, 9, 8, 7, 3};

// Using the for loop to calculate the area of each circle using the radius from array and with help of constant pi
for (int i = 0; i < radii.length; i++) {
//Explanatory text

double area = pi * radii[i] * radii[i];

int item_no = i + 1;

  
jta.append("We used for loop for " + i + "th iteration and using the " + item_no + "th item of radii array to calculate the area with the help of constant\n");
jta.append("The area of the circle with radius " + radii[i] + " is " + area + "\n\n");

}
}

/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>

/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(true);
}
});
}

// Variables declaration - do not modify   
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JTree jTree1;
private javax.swing.JButton jb;
private javax.swing.JTextArea jta;
// End of variables declaration   
}

Output:

Explanation:

• We have used JFrame in this problem.
• Button is created in JFrame and its used as an Event Handler with variable name as jb
• Text Area with variable name jta is used as text area for output
• We have declared 5 variables where the areas of circle is stored
• We used for loop to calculate the area of each circle using the radius from radii array and with help of constant pi
• In each iteration we stored the area into areas array
• Finally using the value from areas array we stored the values into each of 5 variables

Screenshots of Code: