When typing text. My IPad keeps inserting full stops followed by a Cap letter. Also Back arrow, when tapped once, goes back quickly. And deletes everything that I have. Just typed.Would appreciate your help..
SUddenly, when typing text on my IPad, full stops followed by a capital letter. Keep occurring. Also when I tap the back erase. Arrow, everything that I have previously. Typed gets erased. Would love some help with this, have looked in settings but none the wiser. Thanks.
Do yo have the "." shortcut set to On? (Settings>General>Keyboard). If you do, it may be that you are hitting the space bar twice without realizing it. This will insert a period.
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This week is my 8thweek of learning java and I am finding it tougher and tougher as the weeks go by. I have been working on this StudentSystem program for about a week now. I have done all I could but I am left with one part which I am finding it tough to handle.
I would appreciate if a good samaritan could add this code for me. I am at my wits end.
The program I am trying to write is supposed to add students with their personal information and then display them in a GUI.
I should be able to select a student and add a grade for that student.
Finally I should be able to get the average for all the grades added for this student and display the average grade.
My challenge is how to obtain all the added scores and show the students average in a new model.
I was thinking of adding a "Get Average" button , which will pop up a new window(Average) displaying the average of all the scores for the Student.
I just can't figure how to link this average display window to the Get Average button.
A student can have any number of grades.
Your help will be very much appreciated
Thanks in advance
Little Delmarie.
THIS IS WHAT I HAVE DONE SO FAR . IT COMPILES nicely in DOS and Visual age
// CODE GradeSystem
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.event.*;
import java.awt.*;
* UsingJLists.java
* This is a sample program for the use of JLists. You can add a student by entering their
* information a clicking on add. You can remove a student by entering their information and
* clicking on remove. They must be in the list to be removed. You can modify a student by
* entering their information and clicking add. You will be asked for the new student
* information when using modify. The add and remove buttons will disappear when modifying
* is underway and the new information is being collected for updating.
* @author Delmarie
public class GradeSystem extends JDialog {
Vector studentGrades = new Vector();
JButton add, modify, remove;
JList theJList;
JPanel buttonPanel, textPanel, labelPanel, masterPanel, jlistPanel, infoPanel;
JTextField score, possibleScore, gradeType;
JLabel label1, label2, label3;
public class ModifyHandler implements ActionListener {
public void actionPerformed(java.awt.event.ActionEvent actionEvent) {
// get the student info from the text boxes
double dScore = 0;
double dPossibleScore = 0;
try {
String str1 = score.getText();
if (str1 != null) dScore = Double.parseDouble(str1);
String str2 = possibleScore.getText();
if (str2 != null) dPossibleScore = Double.parseDouble(str2);
catch(NumberFormatException e) {}
String sGradeType = gradeType.getText();
Grade grade = (Grade)theJList.getSelectedValue();
if (grade == null) {
score.setText("");
possibleScore.setText("");
gradeType.setText("");
return;
grade.setScore(dScore);
grade.setPossibleScore(dPossibleScore);
grade.setGradeType(sGradeType);
theJList.repaint();
public class RemoveHandler implements ActionListener {
public void actionPerformed(java.awt.event.ActionEvent actionEvent) {
int removeIndex = theJList.getSelectedIndex();
if (removeIndex == -1) {
score.setText("");
possibleScore.setText("");
gradeType.setText("");
return;
DefaultListModel model = (DefaultListModel) theJList.getModel();
model.removeElementAt(removeIndex);
studentGrades.removeElementAt(removeIndex);
// clear the textboxes
score.setText("");
possibleScore.setText("");
gradeType.setText("");
public class AddHandler implements ActionListener {
public void actionPerformed(ActionEvent actionEvent) {
// get the student info from the text boxes
double dScore = 0;
double dPossibleScore = 0;
try {
String str1 = score.getText();
if (str1 != null) dScore = Double.parseDouble(str1);
String str2 = possibleScore.getText();
if (str2 != null) dPossibleScore = Double.parseDouble(str2);
catch(NumberFormatException e) {}
String sGradeType = gradeType.getText();
// get the model and add the student to the model
Grade g = new Grade();
g.setScore(dScore);
g.setPossibleScore(dPossibleScore);
g.setGradeType(sGradeType);
studentGrades.add(g);
DefaultListModel model = (DefaultListModel) theJList.getModel();
model.addElement(g);
// display the added element
theJList.setSelectedValue(g, true);
public class WindowHandler extends WindowAdapter {
public void windowClosing(WindowEvent e) {
setVisible(false);
/** Creates a new instance of UsingJLists */
public GradeSystem(JFrame owner, boolean modal) {
super(owner, modal);
// create all of the components, put them in panels, and put the panels in JFrame
add = new JButton("Add");
modify = new JButton("Modify");
remove = new JButton("Remove");
score = new JTextField("");
score.setColumns(10);
possibleScore = new JTextField("");
gradeType = new JTextField("");
label1 = new JLabel("score");
label2 = new JLabel("possibleScore");
label3 = new JLabel("gradeType");
FlowLayout flow = new FlowLayout();
FlowLayout flow1 = new FlowLayout();
FlowLayout flow2 = new FlowLayout();
GridLayout grid1 = new GridLayout(7,1);
GridLayout grid2 = new GridLayout(7,1);
BorderLayout border3 = new BorderLayout();
buttonPanel = new JPanel(flow);
buttonPanel.add(add);
buttonPanel.add(modify);
buttonPanel.add(remove);
labelPanel = new JPanel(grid1);
//labelPanel.setBorder(BorderFactory.createLineBorder(Color.black));
labelPanel.add(Box.createVerticalStrut(20));
labelPanel.add(label1);
labelPanel.add(Box.createVerticalStrut(20));
labelPanel.add(label2);
labelPanel.add(Box.createVerticalStrut(20));
labelPanel.add(label3);
labelPanel.add(Box.createVerticalStrut(20));
textPanel = new JPanel(grid2);
//textPanel.setBorder(BorderFactory.createLineBorder(Color.black));
textPanel.add(Box.createVerticalStrut(20));
textPanel.add(score);
textPanel.add(Box.createVerticalStrut(20));
textPanel.add(possibleScore);
textPanel.add(Box.createVerticalStrut(20));
textPanel.add(gradeType);
textPanel.add(Box.createVerticalStrut(20));
infoPanel = new JPanel(new FlowLayout());
infoPanel.setBorder(BorderFactory.createTitledBorder("Grade Information"));
infoPanel.add(Box.createHorizontalStrut(10));
infoPanel.add(textPanel);
infoPanel.add(Box.createHorizontalStrut(10));
infoPanel.add(labelPanel);
infoPanel.add(Box.createHorizontalStrut(10));
theJList = new JList(new DefaultListModel());
theJList.addListSelectionListener(new javax.swing.event.ListSelectionListener(){
public void valueChanged(ListSelectionEvent evt) {
Grade grade = (Grade)theJList.getSelectedValue();
if (grade == null) {
score.setText("");
possibleScore.setText("");
gradeType.setText("");
return;
score.setText(Double.toString(grade.getScore()));
possibleScore.setText(Double.toString(grade.getPossibleScore()));
gradeType.setText(grade.getGradeType());
//JLabel theLabel = new JLabel("Students");
jlistPanel = new JPanel(border3);
jlistPanel.setBorder(BorderFactory.createTitledBorder("List of Scores"));
jlistPanel.add(new JScrollPane(theJList));//, BorderLayout.SOUTH);
masterPanel = new JPanel(new GridLayout(1, 2));
masterPanel.setBorder(BorderFactory.createLineBorder(Color.black));
// masterPanel.add(Box.createHorizontalStrut(10));
masterPanel.add(infoPanel);
// masterPanel.add(Box.createHorizontalStrut(10));
masterPanel.add(jlistPanel);
// masterPanel.add(Box.createHorizontalStrut(10));
BorderLayout border = new BorderLayout();
this.getContentPane().setLayout(border);
Container theContainer = this.getContentPane();
theContainer.add(buttonPanel,BorderLayout.SOUTH);
theContainer.add(masterPanel, BorderLayout.CENTER);
// now add the event handlers for the buttons
AddHandler handleAdd = new AddHandler();
ModifyHandler handleModify = new ModifyHandler();
RemoveHandler handleRemove = new RemoveHandler();
add.addActionListener(handleAdd);
modify.addActionListener(handleModify);
remove.addActionListener(handleRemove);
// add the event handler for the window events
WindowHandler handleWindow = new WindowHandler();
this.addWindowListener(handleWindow);
setSize(600,300);
* Insert the method's description here.
* Creation date: (2/24/03 4:20:07 PM)
* @param v com.sun.java.util.collections.Vector
public void setStudentGrades(Vector v) {
studentGrades = v;
DefaultListModel model = (DefaultListModel) theJList.getModel();
model.removeAllElements();
int size = v.size();
for (int i = 0; i < size; i++) {
model.addElement(v.get(i));
score.setText("");
possibleScore.setText("");
gradeType.setText("");
setVisible(true);
// CODE2 StudentSystem
import javax.swing.*;
import javax.swing.event.*;
import java.awt.event.*;
import java.awt.*;
* UsingJLists.java
* This is a sample program for the use of JLists. You can add a student by entering their
* information a clicking on add. You can remove a student by entering their information and
* clicking on remove. They must be in the list to be removed. You can modify a student by
* entering their information and clicking add. You will be asked for the new student
* information when using modify. The add and remove buttons will disappear when modifying
* is underway and the new information is being collected for updating.
* @author Delmarie
public class StudentSystem extends JFrame {
StudentGradeBook studentGradeBook = new StudentGradeBook();
GradeSystem gradeSystem = new GradeSystem(this, true);
JButton add, modify, remove, bGrade;
JList theJList;
JPanel buttonPanel, textPanel, labelPanel, masterPanel, jlistPanel, infoPanel;
JTextField name, address, email, phone, courseName, courseDescription;
JLabel label1, label2, label3;
StudentSystem tempObjectRef; // used to hold a class level reference to object for dispose
boolean getStudentInfo = false;
int saveIndexInObject;
public class ModifyHandler implements ActionListener {
public void actionPerformed(java.awt.event.ActionEvent actionEvent) {
// get the information for the student to modify
String studentName = name.getText();
String studentAddress = address.getText();
String studentEmail = email.getText();
if (!getStudentInfo) { // set up to get student info
// find the correct element of the model to remove and save in class variable
int removeIndex = -1;
DefaultListModel model = (DefaultListModel) theJList.getModel();
for (int i = 0; i < model.size(); i++) {
String temp = (String) model.elementAt(i);
if (temp.equals(name.getText())) {
removeIndex = i;
break;
saveIndexInObject = removeIndex;
if (removeIndex == -1) return;
// change the text on the border of the info box
infoPanel.setBorder(BorderFactory.createTitledBorder("Enter new Student Info"));
// set up to get the modified info and remove some of the buttons
getStudentInfo = true;
buttonPanel.removeAll();
buttonPanel.add(modify);
buttonPanel.add(bGrade);
buttonPanel.repaint();
else {
// reset the border and change the element at the provided index (from if above)
getStudentInfo = false;
infoPanel.setBorder(BorderFactory.createTitledBorder("Student Information"));
DefaultListModel model = (DefaultListModel) theJList.getModel();
model.setElementAt(name.getText(), saveIndexInObject);
Student student = studentGradeBook.findStudent(saveIndexInObject);
student.setName(name.getText());
student.setAddress(address.getText());
student.setEmail(email.getText());
student.setPhone(phone.getText());
student.setCourseName(courseName.getText());
student.setCourseDescription(courseDescription.getText());
// clear the textboxes
name.setText("");
address.setText("");
email.setText("");
phone.setText("");
courseName.setText("");
courseDescription.setText("");
// restore all of the buttons
buttonPanel.removeAll();
buttonPanel.add(add);
buttonPanel.add(modify);
buttonPanel.add(remove);
buttonPanel.add(bGrade);
buttonPanel.repaint();
public class RemoveHandler implements ActionListener {
public void actionPerformed(java.awt.event.ActionEvent actionEvent) {
// get the student info from the text boxes
String studentName = name.getText();
String studentAddress = address.getText();
String studentEmail = email.getText();
// find the element to remove by name (you could use email address etc also)
int removeIndex = -1; // = theJList.getSelectedIndex();
DefaultListModel model = (DefaultListModel) theJList.getModel();
for (int i = 0; i < model.size(); i++) {
String temp = (String) model.elementAt(i);
if (temp.equals(name.getText())) {
removeIndex = i;
break;
if (removeIndex == -1) return;
// remove the element at the index from the for loop
model.removeElementAt(removeIndex);
Student student = studentGradeBook.findStudent(removeIndex);
studentGradeBook.removeStudent(student);
// clear the textboxes
name.setText("");
address.setText("");
email.setText("");
phone.setText("");
courseName.setText("");
courseDescription.setText("");
public class AddHandler implements ActionListener {
public void actionPerformed(java.awt.event.ActionEvent actionEvent) {
// get the student info from the text boxes
String studentName = name.getText();
String studentAddress = address.getText();
String studentEmail = email.getText();
String studentPhone = phone.getText();
String studentCourseName = courseName.getText();
String studentCourseDescription = courseDescription.getText();
// get the model and add the student to the model
studentGradeBook.addStudent(studentName, studentAddress, studentEmail, studentPhone,
studentCourseName, studentCourseDescription);
DefaultListModel model = (DefaultListModel) theJList.getModel();
model.addElement(studentName);
// reset the text boxes
name.setText("");
address.setText("");
email.setText("");
phone.setText("");
courseName.setText("");
courseDescription.setText("");
public class WindowHandler extends WindowAdapter {
public void windowClosing(WindowEvent e) {
gradeSystem.dispose();
tempObjectRef.dispose();
System.exit(0);
/** Creates a new instance of UsingJLists */
public StudentSystem() {
// create all of the components, put them in panels, and put the panels in JFrame
add = new JButton("Add");
modify = new JButton("Modify");
remove = new JButton("Remove");
bGrade = new JButton("Grades");
name = new JTextField("");
name.setColumns(10);
address = new JTextField("");
email = new JTextField("");
phone = new JTextField("");
courseName = new JTextField("");
courseDescription = new JTextField("");
label1 = new JLabel("name");
label2 = new JLabel("address");
label3 = new JLabel("email");
JLabel label4 = new JLabel("phone");
JLabel label5 = new JLabel("courseName");
JLabel label6 = new JLabel("courseDescription");
FlowLayout flow = new FlowLayout();
FlowLayout flow1 = new FlowLayout();
FlowLayout flow2 = new FlowLayout();
GridLayout grid1 = new GridLayout(13,1);
GridLayout grid2 = new GridLayout(13,1);
BorderLayout border3 = new BorderLayout();
buttonPanel = new JPanel(flow);
buttonPanel.add(add);
buttonPanel.add(modify);
buttonPanel.add(remove);
buttonPanel.add(bGrade);
bGrade.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
int index = theJList.getSelectedIndex();
if (index == -1) return;
Student student = studentGradeBook.findStudent(index);
gradeSystem.setStudentGrades(student.getStudentGrades());
labelPanel = new JPanel(grid1);
//labelPanel.setBorder(BorderFactory.createLineBorder(Color.black));
labelPanel.add(Box.createVerticalStrut(20));
labelPanel.add(label1);
labelPanel.add(Box.createVerticalStrut(20));
labelPanel.add(label2);
labelPanel.add(Box.createVerticalStrut(20));
labelPanel.add(label3);
labelPanel.add(Box.createVerticalStrut(20));
labelPanel.add(label4);
labelPanel.add(Box.createVerticalStrut(20));
labelPanel.add(label5);
labelPanel.add(Box.createVerticalStrut(20));
labelPanel.add(label6);
labelPanel.add(Box.createVerticalStrut(20));
textPanel = new JPanel(grid2);
//textPanel.setBorder(BorderFactory.createLineBorder(Color.black));
textPanel.add(Box.createVerticalStrut(20));
textPanel.add(name);
textPanel.add(Box.createVerticalStrut(20));
textPanel.add(address);
textPanel.add(Box.createVerticalStrut(20));
textPanel.add(email);
textPanel.add(Box.createVerticalStrut(20));
textPanel.add(phone);
textPanel.add(Box.createVerticalStrut(20));
textPanel.add(courseName);
textPanel.add(Box.createVerticalStrut(20));
textPanel.add(courseDescription);
textPanel.add(Box.createVerticalStrut(20));
infoPanel = new JPanel(new FlowLayout());
infoPanel.setBorder(BorderFactory.createTitledBorder("Student Information"));
infoPanel.add(Box.createHorizontalStrut(10));
infoPanel.add(textPanel);
infoPanel.add(Box.createHorizontalStrut(10));
infoPanel.add(labelPanel);
infoPanel.add(Box.createHorizontalStrut(10));
theJList = new JList(new DefaultListModel());
theJList.addListSelectionListener(new javax.swing.event.ListSelectionListener(){
public void valueChanged(ListSelectionEvent evt) {
int index = theJList.getSelectedIndex();
if (index == -1) return;
Student student = studentGradeBook.findStudent(index);
name.setText(student.getName());
address.setText(student.getAddress());
email.setText(student.getEmail());
phone.setText(student.getPhone());
courseName.setText(student.getCourseName());
courseDescription.setText(student.getCourseDescription());
//JLabel theLabel = new JLabel("Students");
jlistPanel = new JPanel(border3);
jlistPanel.setBorder(BorderFactory.createTitledBorder("List of Students"));
jlistPanel.add(new JScrollPane(theJList), BorderLayout.SOUTH);
masterPanel = new JPanel(flow1);
masterPanel.setBorder(BorderFactory.createLineBorder(Color.black));
masterPanel.add(Box.createHorizontalStrut(10));
masterPanel.add(infoPanel);
masterPanel.add(Box.createHorizontalStrut(10));
masterPanel.add(jlistPanel);
masterPanel.add(Box.createHorizontalStrut(10));
BorderLayout border = new BorderLayout();
this.getContentPane().setLayout(border);
Container theContainer = this.getContentPane();
theContainer.add(buttonPanel,BorderLayout.SOUTH);
theContainer.add(masterPanel, BorderLayout.NORTH);
// now add the event handlers for the buttons
AddHandler handleAdd = new AddHandler();
ModifyHandler handleModify = new ModifyHandler();
RemoveHandler handleRemove = new RemoveHandler();
add.addActionListener(handleAdd);
modify.addActionListener(handleModify);
remove.addActionListener(handleRemove);
// add the event handler for the window events
WindowHandler handleWindow = new WindowHandler();
this.addWindowListener(handleWindow);
// make the frame visible and set its size and show it.
this.setVisible(true);
this.pack();//setSize(600,300);
this.show();
public static void main (String [] args) {
StudentSystem mainObject = new StudentSystem();
mainObject.setTempObjectRef(mainObject);
public void setTempObjectRef(StudentSystem obj) {
// set up a reference to this object for use in closing the window method dispose
tempObjectRef = obj;
// CODE 3 Student
import java.util.*;
* Insert the type's description here.
* Creation date: (2/24/03 11:23:58 AM)
* @author: Delmarie
public class Student {
private String name, address, phone, email, courseName, courseDescription;
private Vector studentGrades;
* Student constructor comment.
public Student() {
studentGrades = new Vector();
* Insert the method's description here.
* Creation date: (2/24/03 11:39:56 AM)
* @param score double
* @param possibleScore double
* @param gradeType java.lang.String
public void addGrade(double score, double possibleScore, String gradeType) {
Grade g = new Grade();
g.setScore(score);
g.setPossibleScore(possibleScore);
g.setGradeType(gradeType);
studentGrades.add(g);
* Insert the method's description here.
* Creation date: (2/24/03 11:47:01 AM)
* @return Grade
* @param index int
public Grade findGrade(int index) {
return (Grade)studentGrades.get(index);
* Insert the method's description here.
* Creation date: (2/24/03 11:28:57 AM)
* @return java.lang.String
public java.lang.String getAddress() {
return address;
* Insert the method's description here.
* Creation date: (2/24/03 11:28:57 AM)
* @return java.lang.String
public java.lang.String getCourseDescription() {
return courseDescription;
* Insert the method's description here.
* Creation date: (2/24/03 11:28:57 AM)
* @return java.lang.String
public java.lang.String getCourseName() {
return courseName;
* Insert the method's description here.
* Creation date: (2/24/03 11:28:57 AM)
* @return java.lang.String
public java.lang.String getEmail() {
return email;
* Insert the method's description here.
* Creation date: (2/24/03 11:48:03 AM)
* @return java.util.Iterator
public Iterator getGradeIterator() {
return studentGrades.iterator();
* Insert the method's description here.
* Creation date: (2/24/03 11:28:57 AM)
* @return java.lang.String
public java.lang.String getName() {
return name;
* Insert the method's description here.
* Creation date: (2/24/03 11:28:57 AM)
* @return java.lang.String
public java.lang.String getPhone() {
return phone;
* Insert the method's description here.
* Creation date: (2/25/03 10:56:13 AM)
* @return java.util.Vector
public java.util.Vector getStudentGrades() {
return studentGrades;
* Insert the method's description here.
* Creation date: (2/24/03 11:41:52 AM)
* @param grade Grade
public void removeGrade(Grade grade) {
studentGrades.remove(grade);
* Insert the method's description here.
* Creation date: (2/24/03 11:28:57 AM)
* @param newAddress java.lang.String
public void setAddress(java.lang.String newAddress) {
address = newAddress;
* Insert the method's description here.
* Creation date: (2/24/03 11:28:57 AM)
* @param newCourseDescription java.lang.String
public void setCourseDescription(java.lang.String newCourseDescription) {
courseDescription = newCourseDescription;
* Insert the method's description here.
* Creation date: (2/24/03 11:28:57 AM)
* @param newCourseName java.lang.String
public void setCourseName(java.lang.String newCourseName) {
courseName = newCourseName;
* Insert the method's description here.
* Creation date: (2/24/03 11:28:57 AM)
* @param newEmail java.lang.String
public void setEmail(java.lang.String newEmail) {
email = newEmail;
* Insert the method's description here.
* Creation date: (2/24/03 11:28:57 AM)
* @param newName java.lang.String
public void setName(java.lang.String newName) {
name = newName;
* Insert the method's description here.
* Creation date: (2/24/03 11:28:57 AM)
* @param newPhone java.lang.String
public void setPhone(java.lang.String newPhone) {
phone = newPhone;
* Insert the method's description here.
* Creation date: (2/25/03 10:56:13 AM)
* @param newStudentGrades java.util.Vector
public void setStudentGrades(Vector newStudentGrades) {
studentGrades = newStudentGrades;
//CODE 4 StudentGradeBook
import java.util.*;
* Insert the type's description here.
* Creation date: (2/24/03 11:50:35 AM)
* @author: delmarie
public class StudentGradeBook {
private Vector allStudents;
* StudentGradeBook constructor comment.
public StudentGradeBook() {
allStudents = new Vector();
* Insert the method's description here.
* Creation date: (2/24/03 11:54:01 AM)
* @param name java.lang.String
* @param address java.lang.String
* @param email java.lang.String
* @param phone java.lang.String
public void addStudent(String name, String address, String email, String phone) {
Student student = new Student();
student.setName(name);
student.setAddress(address);
student.setEmail(email);
student.setPhone(phone);
allStudents.add(student);
* Insert the method's description here.
* Creation date: (2/24/03 11:54:01 AM)
* @param name java.lang.String
* @param address java.lang.String
* @param email java.lang.String
* @param phone java.lang.String
public void addStudent(String name, String address, String email, String phone,
String courseName, String courseDescription) {
Student student = new Student();
student.setName(name);
student.setAddress(address);
student.setEmail(email);
student.setPhone(phone);
student.setCourseName(courseName);
student.setCourseDescription(courseDescription);
allStudents.add(student);
* Insert the method's description here.
* Creation date: (2/24/03 12:00:53 PM)
* @param index Student
public Student findStudent(int index) {
return (Student)allStudents.get(index);
* Insert the method's description here.
* Creation date: (2/24/03 12:02:43 PM)
* @return java.util.Iterator
public Iterator getStudentIterator() {
return allStudents.iterator();
* Insert the method's description here.
* Creation date: (2/24/03 11:59:41 AM)
* @paFirst of all, this is an extremely advanced project for someone only having 8 weeks of experience. I'm not sure what the "real story" (e.g., the professor teaching the course majored in Public Speaking, student told counselor that she could handle skipping the preliminary course, student transferring from college that used another language as the core language) is but I'll give you my 2 cents anyway.
Suggestions:
I personally would start over keeping the following in mind.
1.) Write a student class that encapsulates/holds the student's personal information, history of grades, computes average and whatever eles is needed from the student.
--the history of grades can be stored in any list structure, preferably some sort of array, since all you going to do with them is average them.
2.) Keep your window display as simple as possible. Basically from my understanding you'll need at a minimum:
JTextField First_Name, Last_Name, Street_Address, City, State, Zip, Average_Grade;
You can either have labels for these or fill them in with their respective labels if they are empty.
JButton New, Average, Add
I don't know the components name, but I'm sure Java has some sort of drop down list that you will need so you can add students' names to it as they are added.
The following is a scenario of how this will come together, initially assuming there are no students:
Your program starts with all the JTextFields containing their repsective labels and grayed out, it's an option or method in JTextField. The drop down list is empty. The teacher has to press the New button, at which time the grayed out text fields become editable. Teacher completes filling out the form and presses the Add button. At this point, your program gathers the information from the text fields (First_Name, Last_Name...) and instantiates or creates a new Student object from your Student class and adds the student name to the drop down list. Now that the new Student object has been created and constructed, you need to store it in you lists structure for later retrieval or writing to disk later.
Now there is a student in the database. So the teacher comes along and wants to average Davey's grades. The teacher goes to the dropdown list and selects Davey's name, which triggers an event in you program. You retrieve the name of the student from your window's drop down list, pull the Student record from your list structure, ask it for the average grade and populate the other text fields in your window with the records information (First_Name, Last_Name, Address...). The Average_Grade text field is made editable and the value of getAverage from the Student object is inserted. The chain of envents keep rolling much in the same manner.
If you made it this far and much of what I said is confusing, then I believe you are in over your head and I'm sorry. If much of what I said sounds similar to what you have or at least you understand a majority of what I said, then let me comment on where you started going awry.
Regarding this project, I believe you envisioned each chain of events spawning a new window, such as user clicks the New button so your program would spawn a new window titled "Enter new Student Information."
You can represent all the task and modes required in this project using a single window display by manipulating the components within the window. If you are looking at a window and suddenly a text box is grayed out, the program is sending a signal to you that its mode has changed.
I hope this helps and good luck. -
Would appreciate your help - my Contacts does not sync into Desktop, it freezes
Can anyone help me?
From my Zire31 I sync with a USB cable into Palm desktop.
The Contacts used to sync allright, but now it does not at all. Other things [memos etc.] do sync, but when the process gets to contacts, it freezes on "syncronizing contacts" on both Desktop and Zire, and stays like that for hours untill I reset!
I tried sevaral settings with the Hotsync manager but none help.
Would be thankfull fro your advice.
Zam
Post relates to: Zire 31Thank you, HardbeatZ. I did what you suggested and the software found 6 possibly corrupted files, all of them in the calender, none in the contacts.
Do you know how I should proceed?
Zam
Post relates to: Zire 31
Message Edited by zam on 07-29-2008 11:05 PM -
Would Appreciate Your Help - Tables Not Connecting/Pages Not Being Generated
Hi,
I have a recipes section in the site I'm building.
There are 7 categories from which a user can click on.
The first page of each category has a form on it for users to enter a new recipe. Once they've entered a new recipe, the title of it is shown above the form. Here's where the problem starts.
First category is desserts, and I entered two dummy titles as a trial run, Apple and Blueberry. No matter which title I click on, I am taken to the page for Apple. And the thing is, when I click on Blueberry, the url address shows Blueberry as the recipe ID. Which indicates to me that it's recognizing it, but not going to the recipe. What am I missing? Could someone please advise as to how I can have the necessary pages created?
There are two separate tables in my database, Recipes, and Categories. The second table was created after I made the SQL connection in Dreamweaver. Do I need to reestablish the connection, because of when the second table was created?
Thank you.
This is the SQL Join that I have on both the Main Desserts Page, and the one to which a recipe should appear on, Recipes Desserts:
$query = "SELECT title".
"FROM recipes, categories".
"WHERE recipes.cat_id = categories.cat_id";
"AND category = desserts";
Here's the code on the Main Desserts page:
<div id="background">
<div id="navbar2">
<ul>
<li><a href="desserts.php">Desserts</a></li>
<li><a href="drinks.php">Drinks</a></li>
<li><a href="fowl.php">Fowl</a></li>
<li><a href="meat.php">Meat</a></li>
<li><a href="pasta.php">Pasta</a></li>
<li><a href="seafood.php">Seafood</a></li>
<li><a class="last" href="vegetables.php">Vegetables</a></li>
</ul>
<p>
</div>
<div id="items">
<ol>
<?php do { ?>
<li><a href="recipesdesserts.php?recipeID=1<?php echo $row_GetRecipes['Title']; ?>"><strong><?php echo $row_GetRecipes['Title']; ?></strong></a></li>
<?php } while ($row_GetRecipes = mysql_fetch_assoc($GetRecipes)); ?>
</ol>
<p><a href="<?php printf("%s?pageNum_GetRecipes=%d%s", $currentPage, max(0, $pageNum_GetRecipes - 1), $queryString_GetRecipes); ?>">Previous</a> Showing<?php echo ($startRow_GetRecipes + 1) ?>...<?php echo min($startRow_GetRecipes + $maxRows_GetRecipes, $totalRows_GetRecipes) ?> out of <?php echo $totalRows_GetRecipes ?> <a href="<?php printf("%s?pageNum_GetRecipes=%d%s", $currentPage, min($totalPages_GetRecipes, $pageNum_GetRecipes + 1), $queryString_GetRecipes); ?>">Next</a></p>
</div>
</div>I'll try to paint a better picture.
I have two tables in the database.
First table is Recipes. The fields in this one are: Title, Ingredients, Prep, Serves.
Second table is Categories. The fields in this one are: Title, Desserts, Drinks, Fowl, Meat, Pasta, Seafood, Vegetables.
User 1 enters the following into the form:
Title: Apple Strudel
Ingredients: Apples, Flour, Water
Prep: Core and slice apples, etc.
Serves: 6
User 2 enters the following into the form:
Title: Blueberry Pie
Ingredients: Blueberries, Flour, Water
Prep: Wash blueberries, etc.
Serves: 6
Both titles now appear on the Main Desserts page, which is what I want. When a user clicks on the title, "Apple Strudel," they are taken to the page with that recipe on it. When a user clicks on the title, "Blueberry Pie," the ending of the URL address is recipesdesserts.php?recipeID=1Blueberry, but the page that's generated shows the recipe for the Strudel.
Does that help at all?
Thank you. -
I'm a new Apple convert. I synced my iPhone4 with iTunes library and not correctly, so ended up with each contact repeating from 4 to 8 times on my phone. I also lost some music from my iPhone's iPod due to this syncing. Would you please help guiding through the syncing process and what's the easiest way to delete these duplicates? Thank you.
To get rid of the dupliate contacts try this:
Set up your contacts on your computer as desired. Make sure that autosync is disabled in iTunes/Settings/Devices. Then connect your phone, click on it in the device list, choose the info pane on the right side, move down to the Advanced section and choose "replace all contact info on the phone" This will overwrite the contacts on your phone with the ones from your computer address book.
After that your contacts should be syncing fine.
Syncing is explained here: Overview of syncing iPhone or iPod touch with your computer
and here: iPhone and iPod touch: Syncing and merging data -
I have an iphone 5 and i would like to connect it to a radio or speakers to play music but i dont know which cable is used and where can i get it.
Depends on the home radio. You can connect a 3.5mm jack to the iPhone and, if your radio has a 3.5mm input, connect that to your radio. If your radio only has RCA style connectors, you can buy an adapter like the one pictured.
Regardless of which method you use, make sure to select the correct input on your radio. You'll also need to turn the volume on your iPhone all the way up.
I hope that makes sense. If not, what's the model of your radio? -
VMA fairly urgent, would appreciate your help VCAP is tomorrow.
Hi All,
I Would be eternally grateful if anyone had any advice on this problem. I have installed and configured a new instance of the vMA, added it on the domain, added target servers however I don't seem to be able to run anything against hosts resxtop for example. It doesn't seem to matter if I run it with local credentials or AD nada! the prompt just bounces back at me. I know the credentials are correct for everything I have tried, I have confirmed system time, tried both American keyboard/UK, rebooted the box I know DNS is ok and have tried IP's regardless. Its a long shot but if anyone could take a look at the attached screenshot and let me know if I am doing something silly I would be grateful. I really want to nail this as its in my VCAP tomorrow, I feel like I know the relevant commands but want to actually test it.Well that fixed it!!! What the fluffing hell was that all about, hope I don't have to contend with that sort of rubbish in the actual exam? How did that sort it mate? What was wrong is it a known issue/bug or am I a muppet?
-
i wanted to backup my phone to icloud cause me and my brother will switch phones and i dont want to lose all my stuff. but now it seems that my icloud has some problems, cause even after deleting many photos and videos, and turn it off sync for apps and music, my available storage capacity didnt changed at all!! i dont know whats wrong, somebody can help me please?
thank you so much!!ok, for example for my photos it say 1.9gb on the phone (before it was like 4 or more) but in backup still 4. should i just turn off camera roll in backup options?
-
Greeting
I am not being able since last week to download PDF document from email to ibooks. Once the PDF document in the email open it is shown as image document and cannot be downloaded to ibooks. This recent problem is also experienced in my ipad mini. Currently, i have to download the PDF document to my ibooks via the itunes only
Appreciate your helpGreeting
I am not being able since last week to download PDF document from email to ibooks. Once the PDF document in the email open it is shown as image document and cannot be downloaded to ibooks. This recent problem is also experienced in my ipad mini. Currently, i have to download the PDF document to my ibooks via the itunes only
Appreciate your help -
I have a MacBook Pro , Model Identifier MacBook Pro8,2 , MAC OX S 10.7.4.
Question 1: Does this model have a PCI Express slot?
Question 2: Can I upgrade my USB2 port in this laptop to a USB3 port?
Appreciate your help & advice..No & no.
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