Re: ActionListener

Knute here's the whole things. Red, i'm not sure what you mean by top
posting.

Art

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.DecimalFormat;
import java.util.ArrayList; // to use array list
import java.util.Scanner; // Needed for the Scanner class
import java.io.*; // Needed for the File class

public class StudentTestPlusButtons extends JFrame

{

private JButton prev;// previous record button
private JButton save;// save button
private JButton next;// next record button
private JRadioButton numberGrade;
private JRadioButton letterGrade;
private JRadioButton average;
private JButton exit;
private JLabel test_1;
private JLabel test_2;
private JLabel test_3;
private JTextField test1; // test 1 label
private JTextField test2; // test 2 label
private JTextField test3; // test 3 label
private JLabel name;
private JTextField student;
private JButton read;
private final int WINDOW_HEIGHT = 300;
private final int WINDOW_WIDTH = 500;
private JPanel buildPanel;
private JPanel buildButtonPanel;
private StudentAddWindow studentAdd;
private CalcGrade calc;
private GreetingPanel greet;
private ButtonGroup bg;
public final char SELECT = 'A';
static int index=0;

/**
Constructor
*/

public StudentTestPlusButtons()
{

//Set the title
setTitle("Student grade calculator");

setLayout(new BorderLayout());
//Set size of window
//setSize(WINDOW_WIDTH, WINDOW_HEIGHT);

//Close button
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Create custom panels
studentAdd = new StudentAddWindow();
calc = new CalcGrade();
greet = new GreetingPanel();

//Build the panel and add it to the frame
buildPanel();
buildButtonPanel();

//Add components to the content pane
add(studentAdd, BorderLayout.EAST);
add(buildButtonPanel, BorderLayout.WEST);

add(calc, BorderLayout.CENTER);
add(buildPanel,BorderLayout.NORTH);
//PACK
pack();

//display the window
setVisible(true);
}

private void buildButtonPanel()
{
buildButtonPanel = new JPanel();

//buttons
prev = new JButton("Prev");
next = new JButton("Next");
save = new JButton("Save");
read = new JButton("Read record");
exit = new JButton("Exit");
//numer = new JRadioButton("Numeric grade");
//alpha = new JRadioButton("Letter grade");
//radio buttons
numberGrade = new JRadioButton();
letterGrade = new JRadioButton();
average = new JRadioButton();

//register action listeners
prev.addActionListener(new prevButtonListener());
next.addActionListener(new nextButtonListener());
save.addActionListener(new saveButtonListener());
read.addActionListener(new readButtonListener());
exit.addActionListener(new exitButtonListener());

//add buttons to panel
buildButtonPanel.add(prev);
buildButtonPanel.add(next);
buildButtonPanel.add(save);
buildButtonPanel.add(read);
buildButtonPanel.add(exit);

//add radio buttons
//group radio buttons
bg = new ButtonGroup();
bg.add(numberGrade);
bg.add(letterGrade);
bg.add(average);

/* bg = new ButtonGroup();
bg.add(numer);
bg.add(alpha);

buildButtonPanel.add(numer);
buildButtonPanel.add(alpha);*/

}

private void buildPanel()
{
buildPanel = new JPanel();

student = new JTextField(20);
name = new JLabel("Student name");

test_1 = new JLabel("Test 1");
test1 = new JTextField(10);
test_2 = new JLabel("Test 2");
test2 = new JTextField(10);
test_3 = new JLabel("Test 3");
test3 = new JTextField(10);

//clear data and set grades equal -1
test1.setText("");
test2.setText("");
test3.setText("");
student.setText("");

//add items to panel
buildPanel.add(name);
buildPanel.add(student);
buildPanel.add(test_1);
buildPanel.add(test1);
buildPanel.add(test_2);
buildPanel.add(test2);
buildPanel.add(test_3);
buildPanel.add(test3);

}

private class readButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
// Create a Scanner object for keyboard input.

//Scanner keyboard = new Scanner(System.in);
int count =0;
String name="";
ArrayList list = new ArrayList();

try
{

// Get the filename.
//System.out.print("Enter the filename: ");
//String filename = keyboard.nextLine();

// Open the file.
File file = new File("c:\\students.txt");

Scanner inputFile = new Scanner(file);

// Read lines from the file until no more are left.
while (inputFile.hasNext())
{
// Read the next name.
String StudentName = inputFile.nextLine();
list.add(StudentName);
count ++;
// Display the last name read.

}
System.out.println(count);
// Close the file.
name = list.get(0).toString();
student.setText(name);
inputFile.close();
}
catch(IOException x)
{
//System.out.println("Unable to add student - " + x.getMessage());
JOptionPane.showMessageDialog(null, "Unable to write record");
//JOptionPane.ERROR_MESSAGE);
System.exit(1);
}
}
}

private class saveButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{

}
}

private class nextButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
int hold=0;

String name="",hold1="",hold2="",hold3="";
ArrayList names = new ArrayList();
double[][] grades;
names = getNames();

//get and show name
name = names.get(index).toString();

grades = getScores();
System.out.println("the index is "+index);

//get and show grades
test1.setText(hold1 = Double.toString(grades[index][0]));
test2.setText(hold2 = Double.toString(grades[index][1]));;
test3.setText(hold3 = Double.toString(grades[index][2]));

index = index++;

//test1 = grades[index][1].toString();
}

}

private class exitButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
System.exit(0);
}
}

private class prevButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
}
}

public char getGradeType()
{
char gType = 'A';

if (numberGrade.isSelected())
gType = 'N';
else if (letterGrade.isSelected())
gType = 'L';
else
gType = 'A';
return gType;
}

public double[][] getScores()
{
// Create a Scanner object for keyboard input.
final int ROW = 3, COL=3;
int row=0;
double [][] gradeArray;
gradeArray = new double[ROW][COL];

try
{
// Open the file.
File file = new File("c:\\grades.txt");
Scanner inputFile = new Scanner(file);
while (inputFile.hasNext())
{
String line = inputFile.nextLine();
row ++;
}

inputFile.close();

//File file = new File(filename);
// Scanner inputFile = new Scanner(file);
file = new File("c:\\grades.txt");
inputFile = new Scanner(file);

/* while (inputFile.hasNext())
{*/
for (int i=0; i < row ; i++)

{
String line = inputFile.nextLine();
String hold, line2="", linenew;
System.out.println("the row amount " + row);
double hold2,hold3=0;
int lineLength = 0;
int comma=0;
int beg=0;

for (int x=0; x < COL; x++)
{
System.out.println("you got here");
lineLength = line.length();
comma = line.indexOf(',');
linenew = line.substring(beg,comma);
hold3 = Double.parseDouble(linenew);
gradeArray[i][x] = hold3;
line = line.substring(beg+(comma+1),lineLength);
System.out.println(hold3);
//line = line.substring(comma,lineLength - comma);
}//end inner for

}// end outer for
// Close the file.

inputFile.close();
System.out.println("this is the outer loop");
//

}catch(IOException x)
{
//System.out.println("Unable to add student - " + x.getMessage());
JOptionPane.showMessageDialog(null, "Unable to read record");
//JOptionPane.ERROR_MESSAGE);
System.exit(1);
}

return gradeArray;

}

public ArrayList getNames()
{
int count =0;
String name="";
ArrayList list = new ArrayList();

try
{

// Get the filename.
//System.out.print("Enter the filename: ");
//String filename = keyboard.nextLine();

// Open the file.
File file = new File("c:\\students.txt");

Scanner inputFile = new Scanner(file);

// Read lines from the file until no more are left.
while (inputFile.hasNext())
{
// Read the next name.
String StudentName = inputFile.nextLine();
list.add(StudentName);
count ++;
// Display the last name

}
System.out.println(count);
// Close the file.
name = list.get(0).toString();
student.setText(name);
inputFile.close();
}
catch(IOException x)
{
//System.out.println("Unable to add student - " + x.getMessage());
JOptionPane.showMessageDialog(null, "Unable to write record");
//JOptionPane.ERROR_MESSAGE);
System.exit(1);
}

return list;
}

}

"RedGrittyBrick" <RedGrittyBrick@SpamWeary.foo> wrote in message
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