Applet help get text and use it as a double

[m1c1]

Hello to all
I am sure this is easy to others that are more experience with java applets.

I need an example of when the user enters a double type number into a text field, then change it from text to a workable double for calculation them display results.

I can get this to work in an application but not in a applet.
So far using the getText() I can display text but when I try to convert text to a workable double using

String typHoursIn = HoursField.getText();
double hours;
hours = Double.parseDouble( typHoursIn );
I get error: cannot resolve symbol on Total, hours, and rate.
example code below
-----------------------------------------------------------
public void changeToNum(double hours,double rate)
{
String typHoursIn = HoursField.getText();
hours = Double.parseDouble( typHoursIn );

String typRateIn = RateField.getText();
rate = Double.parseDouble( typRateIn );
}
public double calcu(double Total)
{
double hrs= changeToNum(hours);
double r= changeToNum(rate);
double sum=0;
double Otime = 0;
if(hrs <= 40){
Total = r * hrs;

}else{
sum = r * 40;
Otime = (hrs - 40)*(r * 1.50);
Total = sum + Otime;
}
return Total;
}

public void paint(Graphics g)
{
// get the text out the TextField
g.setColor(Color.blue);
g.drawString("Name: " + NameField.getText(),140,150);
g.drawString("Hours worked: "+ HoursField.getText(),140,170);
g.drawString("Pay Rate: " + RateField.getText(),140,190);
g.drawString("Gross Pay is: " + calcu(Total),140,220);
}

I look forward to any help
Mike

[Phaelax]

JTextField t = new JTextField();

double d = Double.parseDouble(t.getText());

[m1c1]

Thanks Phaelax
I still can not get it to work like I said before I get error: cannot resolve symbol on Total, hours, and rate I am posting the the whole code.
-----------------------------------------------------------------------

import java.io.*;
import java.awt.*;
import java.applet.*;
// import an extra class for the ActionListener
import java.awt.event.*;


public class wageCalApplet extends Applet implements ActionListener
{

// A Button to click
Button OkButton;
// 3 textFieldS to get text input
TextField NameField;
TextField HoursField;
TextField RateField;
// labelS to A fix staionary text
Label Label1;
Label Label2;
Label Label3;

public void init()
{
setLayout(new FlowLayout());
// Tell the applet not to use a layout manager.
setLayout(null);
// initialze the button and give it text value.
OkButton = new Button("NEXT");

// text and length of the field
NameField = new JTextField(" ",50);
HoursField = new JTextField(" ",50);
RateField = new JTextField(" ",50);
Label1 = new Label("Enter Name");
Label2 = new Label("Enter Hours Worked");
Label3 = new Label("Enter Pay Rate");


// now we will specify the positions of the GUI components.
// this is done by specifying the x and y coordinate and
//the width and height.

Label1.setBounds(20,20,140,20);
NameField.setBounds(140,20,225,20);

Label2.setBounds(20,55,140,20);
HoursField.setBounds(140,55,75,20);

Label3.setBounds(20,90,140,20);
RateField.setBounds(140,90,75,20);

OkButton.setBounds(20,145,70,20);

// now that all is set we can add these components to the applet
add(OkButton);
add(NameField);
add(HoursField);
add(RateField);
add(Label1);
add(Label2);
add(Label3);

// Attach actions to the components

OkButton.addActionListener(this);

}

public double calcu(double Total)

{
//this is were the problem is I thank
double hours = Double.parseDouble(HoursField.getText());
double rate= Double.parseDouble(RateField.getText());
double sum=0;
double Otime = 0;
if(hours <= 40){
Total = rate * hours;


}else{
sum = rate * 40;
Otime = (hours - 40)*(rate * 1.50);
Total = sum + Otime;

}

return Total;


}

// Here we will show the results of our actions
public void paint(Graphics g)
{
// get the text out the TextField
g.setColor(Color.blue);
g.drawString("Name: " + NameField.getText(),140,150);
g.drawString("Hours worked: "+ HoursField.getText(),140,170);
g.drawString("Pay Rate: " + RateField.getText(),140,190);
//display the Total
g.drawString("Gross Pay is: " + calcu(Total),140,220);
}

// When the button is clicked this method will get automatically called // This is where you specify all actions.

public void actionPerformed(ActionEvent evt)
{
// Here we will ask what component called this method
if (evt.getSource() == OkButton){

// Let the applet perform Paint again.
repaint();
}

}

}
----------------------------------------------------
I am using this applet in a pressentation in school and that is why things may be broken down a little different

I appreciate any help or out put
Mike

[Kram]

Well Total is a local variable to that method calcu(), so you cannot use it outside of that methos unless you declare it first as a global variable.

Also, when you call the method you are doing this:

calcu(Total)

Total is not defined at all as a variable, you need to define it.

One more thing, it is kind of an unwritten law to name variables in lowercase (first letter) and classes in uppercase (first letter).

[m1c1]

Thanks Kram,
Just as you were posting I found that to be so.
I just made Total public in the class and it all works fine. I should have know better, but I am kinda new to writing java applets.
Once again thanks everybody
Mike