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Need Help Reading files

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Chris

Posts: 3
Nickname: topagae
Registered: Feb, 2003

Need Help Reading files

Posted: Feb 6, 2003 8:52 AM

Making a applet that supposed to give a survey and store the results each time, but I am having trouble for it to read the file using "readInt", also problems writing to the data file.

code

import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;

public class SurveyTest extends Applet implements ActionListener
{
DataInputStream input;
DataOutputStream output;
Label surveyNameLabel = new Label ("NHS Parental Survey");
Label getToWorkLabel = new Label ("Please Ansewer the Questions to the Best of Your Ability");

Checkbox q1 = new Checkbox("q1");
int q1Total=0;
Checkbox q2 = new Checkbox("q2");
int q2Total=0;
Checkbox q3 = new Checkbox("q3");
int q3Total=0;
Checkbox q4 = new Checkbox("q4");
int q4Total=0;
Checkbox q5 = new Checkbox("q5");
int q5Total=0;
Checkbox q6 = new Checkbox("q6");
int q6Total=0;
Checkbox q7 = new Checkbox("q7");
int q7Total=0;
Checkbox q8 = new Checkbox("q8");
int q8Total=0;
Checkbox q9 = new Checkbox("q9");
int q9Total=0;
Checkbox q10 = new Checkbox("q10");
int q10Total=0;
Button submitButton = new Button("Submit Results");
int counter=0;

public void init()
{
setBackground(Color.cyan);
add(surveyNameLabel);
add(getToWorkLabel);

setLayout(new GridLayout(11,1));
Panel panels[]=new Panel[11];
for(int i=0;i<panels.length;++i)
{
panels=new Panel();
panels.setLayout(new FlowLayout(FlowLayout.LEFT));
}
panels[0].add(q1);
panels[1].add(q2);
panels[2].add(q3);
panels[3].add(q4);
panels[4].add(q5);
panels[5].add(q6);
panels[6].add(q7);
panels[7].add(q8);
panels[8].add(q9);
panels[9].add(q10);
panels[10].add(submitButton);
submitButton.addActionListener(this);
for(int i=0;i<panels.length;i++)
{
add(panels);
}
//Open File to read data
try
{
input = new DataInputStream(new FileInputStream("Survey.dat"));
}
catch(IOException ex)
{
System.exit(1);
}
//read data
try
{
input.readInt(q1Total);
input.readInt(q2Total);
input.readInt(q3Total);
input.readInt(q4Total);
input.readInt(q5Total);
input.readInt(q6Total);
input.readInt(q7Total);
input.readInt(q8Total);
input.readInt(q9Total);
input.readInt(q10Total);
input.readInt(counter);
}
catch(IOException c)
{
System.exit(1);
}
}
//Do stuff at button's click
public void actionPerformed(ActionEvent e)
{
String arg = e.getActionCommand();
try
{
output = new DataOutputStream(new FileOutputStream("Survey.dat"));
}
catch(IOException op)
{
System.exit(1);
}
try
{
q1Total+=toDigit(q1);
q2Total+=toDigit(q2);
q3Total+=toDigit(q3);
q4Total+=toDigit(q4);
q5Total+=toDigit(q5);
q6Total+=toDigit(q6);
q7Total+=toDigit(q7);
q8Total+=toDigit(q8);
q9Total+=toDigit(q9);
q10Total+=toDigit(q10);
counter++;
}
catch(Exception cng)
{
System.exit(1);
}
//write data to files
try
{
output.writeInt(q1Total);
output.writeInt(q2Total);
output.writeInt(q3Total);
output.writeInt(q4Total);
output.writeInt(q5Total);
output.writeInt(q6Total);
output.writeInt(q7Total);
output.writeInt(q8Total);
output.writeInt(q9Total);
output.writeInt(q10Total);
output.writeInt(counter);
}
catch(IOException wt)
{
System.exit(1);
}
}
//change checkboxes to int
int toDigit(Checkbox ch)
{
boolean state = ch.getState();
if(state) return (1);
else return (0);
}
}

/code

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