SophiaPretty

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About SophiaPretty

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Accounting,Algebra See all
Accounting,Algebra,Applied Sciences,Architecture and Design,Art & Design,Biology,Business & Finance,Calculus,Chemistry,Communications,Computer Science,Economics,Engineering,English,Environmental science,Essay writing Hide all
Teaching Since: Jul 2017
Last Sign in: 304 Weeks Ago, 4 Days Ago
Questions Answered: 15833
Tutorials Posted: 15827

Education

  • MBA,PHD, Juris Doctor
    Strayer,Devery,Harvard University
    Mar-1995 - Mar-2002

Experience

  • Manager Planning
    WalMart
    Mar-2001 - Feb-2009

Category > Computer Science Posted 14 Nov 2017 My Price 10.00

just need it reviewed to make sure it functions correctly.

Hello. I have code written, I just need it reviewed to make sure it functions correctly. I get a run error when I run it. I have attached all of the JAVA files needed to for the assignment.


  • import java.awt.GridLayout;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.util.HashMap;
    import java.util.Map;

    import javax.swing.JButton;
    import javax.swing.JComboBox;
    import javax.swing.JFrame;
    import javax.swing.JLabel;
    import javax.swing.JOptionPane;
    import javax.swing.JTextField;

    public class Project4 extends JFrame {

        public Project4(String title) {
        }

        public static void main(String[] args) {
            JLabel idLabel = new JLabel("   ID:");
            JLabel nameLabel = new JLabel("   Name:");
            JLabel gpaLabel = new JLabel("   Major:");
            JLabel selectionLabel = new JLabel("   Choose Selection:");
            JButton process = new JButton("   Process Request");
            final JTextField idTextField = new JTextField(50);
            final JTextField nameTextField = new JTextField(50);
            final JTextField majorTextField = new JTextField(50);
            final Map<String, Student> map = new HashMap<String, Student>();
            final JComboBox select = new JComboBox(new String[]{"Insert", "Delete", "Find", "Update"});
            JFrame frame = new JFrame();
            frame.setBounds(100, 100, 350, 250);
            frame.setLayout(new GridLayout(7, 2));
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setVisible(true);
            frame.add(idLabel);
            frame.add(idTextField);
            frame.add(nameLabel);
            frame.add(nameTextField);
            frame.add(gpaLabel);
            frame.add(majorTextField);
            frame.add(selectionLabel);
            frame.add(select);
            frame.add(new JLabel(""));
            frame.add(new JLabel(""));
            frame.add(process);
            frame.add(new JLabel(""));
            frame.add(new JLabel(""));
            frame.add(new JLabel(""));
            process.addActionListener(new ActionListener() {

                @Override
                public void actionPerformed(ActionEvent arg0) {
                    String action = select.getSelectedItem().toString();
                    try {
                        if (action.compareTo("Insert") == 0) {
                            String id = idTextField.getText();
                            String name = nameTextField.getText();
                            String major = majorTextField.getText();
                            map.put(id, new Student(name, major));
                            JOptionPane.showMessageDialog(null, "You have inserted new Student \n" + "id: " + id + "\n" + "name: " + name + "\n" + "major: " + major, "Message", JOptionPane.INFORMATION_MESSAGE);
                        } else {
                            if (action.compareTo("Find") == 0) {
                                String id = idTextField.getText();
                                Student student = map.get(id);
                                if (student != null) {
                                    nameTextField.setText(student.getName());
                                    majorTextField.setText(String.valueOf(student.getMajor()));
                                    JOptionPane.showMessageDialog(null, student.toString(), "Message", JOptionPane.INFORMATION_MESSAGE);
                                } else {
                                    JOptionPane.showMessageDialog(null, "Database does not contain id (" + id + ")", "Message", JOptionPane.INFORMATION_MESSAGE);
                                }
                            } else {
                                if (action.compareTo("Delete") == 0) {
                                    String id = idTextField.getText();
                                    if (map.remove(id) != null) {
                                        JOptionPane.showMessageDialog(null, "You have deleted Student with id: " + id, "Message", JOptionPane.INFORMATION_MESSAGE);
                                    } else {
                                        JOptionPane.showMessageDialog(null, "Database does not contain id (" + id + ")", "Message", JOptionPane.INFORMATION_MESSAGE);
                                    }

                                } else if (action.compareTo("Update") == 0) {
                                    String[] Grade = {"A", "B", "C", "D", "F"};
                                    String gradeS = (String) JOptionPane.showInputDialog(null,
                                            "Choose grade:",
                                            "",
                                            JOptionPane.QUESTION_MESSAGE,
                                            null,
                                            Grade,
                                            Grade[0]);
                                    double grade = 0;
                                    if (gradeS.equals("A")) {
                                        grade = 4;
                                    } else if (gradeS.equals("B")) {
                                        grade = 3;
                                    } else if (gradeS.equals("C")) {
                                        grade = 2;
                                    } else if (gradeS.equals("D")) {
                                        grade = 1;
                                    } else {
                                        grade = 0;
                                    }
                                    String[] Credits = {"2", "3", "4", "5", "6"};
                                    int credits = Integer.parseInt((String) JOptionPane.showInputDialog(null,
                                            "Choose credits:",
                                            "",
                                            JOptionPane.QUESTION_MESSAGE,
                                            null,
                                            Credits,
                                            Credits[0]));
                                    String id = idTextField.getText();
                                    if (map.containsKey(id)) {
                                        Student student = map.get(id);
                                        student.addCourse(grade, credits);
                                        map.put(id, student);
                                        student.addCourse(grade, credits);
                                        JOptionPane.showMessageDialog(null, student.toString(), "Message", JOptionPane.INFORMATION_MESSAGE);
                                    }
                                }
                            }
                        }
                    } catch (Exception ex) {
                        JOptionPane.showMessageDialog(null, "Error while " + action + " : " + ex.toString(), "Error", JOptionPane.ERROR_MESSAGE);
                        ex.printStackTrace();
                    }
                }
            });
        }

    }

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Answers

SophiaPretty
(5)
Status NEW Posted 14 Nov 2017 01:11 PM My Price 10.00

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