Passing values through to text fields
Hi there,
I am little rusty with java and I am trying to program a filechooser application that:
1)Opens and reads in a text file of integers
2)Stores these integers in an array
2)Performs various operations on the array (average, highest number etc)
3)Displays the results in text boxes in the gui.
I haven't done much java in a year or so. Could someone give me some pointers.
Here is the code I have so far. It can display the number of integers in a file but I can't pass the avg value to the text boxes.
Thanks.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.util.*;
import java.lang.Integer;
publicclass GroupProjectextends JFrame{
JFileChooser _fileChooser =new JFileChooser();
JTextField_fileNameTF =new JTextField(10);
JTextField_hiNum =new JTextField(3);
JTextField_freq1 =new JTextField(2);
JTextField_secondhiNum =new JTextField(3);
JTextField_freq2 =new JTextField(2);
JTextField_loNum =new JTextField(3);
JTextField_freq3 =new JTextField(2);
JTextField_secondloNum =new JTextField(3);
JTextField_freq4 =new JTextField(2);
JTextField_avgNum =new JTextField(3);
JTextField_numCount =new JTextField(2);
JTextField_sortDisp =new JTextField(2);
GroupProject(){
_fileNameTF.setEditable(false);
_numCount.setEditable(false);
JPanel content =new JPanel();
content.setLayout(new GridLayout(6,2));
content.add(new JLabel("File:"));
content.add(_fileNameTF);
content.add(new JLabel("Number of Integers"));
content.add(_numCount);
content.add(new JLabel("Highest Value Integer"));
content.add(_hiNum);
content.add(new JLabel("Frequency"));
content.add(_freq1);
content.add(new JLabel("Second Highest Value Integer"));
content.add(_secondhiNum);
content.add(new JLabel("Frequency"));
content.add(_freq2);
content.add(new JLabel("Lowest Value Integer"));
content.add(_loNum);
content.add(new JLabel("Frequency"));
content.add(_freq3);
content.add(new JLabel("Second Lowest Value Integer"));
content.add(_secondloNum);
content.add(new JLabel("Frequency"));
content.add(_freq4);
content.add(new JLabel("Average of Integers"));
content.add(_avgNum);
content.add(new JLabel("Display Sorted Integers"));
content.add(_sortDisp);
JMenuBar menubar =new JMenuBar();
JMenufileMenu =new JMenu("File");
JMenuItem openItem =new JMenuItem("Open");
openItem.addActionListener(new OpenAction());
menubar.add(fileMenu);
fileMenu.add(openItem);
this.setJMenuBar(menubar);
this.setContentPane(content);
this.setTitle("Practice Group Project");
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.pack();
this.setLocationRelativeTo(null);
}
publicvoid fillOutForm(ArrayList ints){
Collections.sort(ints);
// int[] a = (int[])ints.toArray(typeof(int));
//ArrayList = Integer.parseInt(ints.get(0).toString());
//int [] a = (int[])ints.toArray(typeof(int));
Integer a[] = (Integer[]) ints.toArray(new Integer[0]);
_numCount.setText("" + ints.size());
_avgNum.setText("" +"not working");
//int max = Integer.parseInt(ints.get(ints.size()-1));
//_hiNum.setText("" + max);
}
// getFrequency takes in an array and a number and searches the array for that number.
// Each time this happens increment a variable then return the variable.
publicvoid getFrequency(){
}
// sortArray sorts the array, reads the last number (highest), and calls getFrequency with this number. Fills out text boxes
// then read the array from the end, inwards, until it gets a different number. calls getFreq on this number, and
// fills out the boxes then reads the first number (lowest) in the array, and calls getFreq on this number. fill out the boxes.
// then read the array one cell at a time, going forwards until it gets a different number. call getFreq on this number and
// then fill out text boxes.
publicvoid sortArray(){
}
// avgArray adds up all the numbers in the array and divides by array size
publicstaticint avgArray(int [] ints)
{
int avg = 0;
for (int i = 0; i < ints.length; ++i)
{
avg += ints[i];
}
return avg;
}
class OpenActionimplements ActionListener{
publicvoid actionPerformed(ActionEvent ae){
int retval = _fileChooser.showOpenDialog(GroupProject.this);
if (retval == JFileChooser.APPROVE_OPTION){
File file = _fileChooser.getSelectedFile();
ArrayList ints = getIntArray(file.getAbsolutePath());
_fileNameTF.setText(file.getName());
fillOutForm(ints);
}
}
//Reads through a given file and fills out an ArrayList with the integers found in that file/
public ArrayList getIntArray(String filename){
ArrayList ints =new ArrayList();
try{
BufferedReader reader =new BufferedReader(new FileReader(filename));
String line = reader.readLine();
while(line !=null){
ints.add(Integer.parseInt(line));
line = reader.readLine();
}
}
catch (Exception e){ System.out.println("Error");}
{
return ints;
}
}
}
publicstaticvoid main(String[] args){
JFrame window =new GroupProject();
window.setVisible(true);
}
}
Message was edited by:
Duckula85
Message was edited by:
Duckula85
