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  1. #1
    celeste is offline Member
    Join Date
    Apr 2014
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    Default trouble writing if statement with combo box

    This is my first post and I'm very new to programming. I'm working on assignment for a class where I'm creating a home utility auditor. Basically the user has to pick from a list of appliances and then input various fields to calculate a total cost. When the user chooses "washer" from the list of appliances, they must enter in values for 2 separate fields, and will then click calculate to get total cost. I've been trying to implement this through an if, else statement, but it's not wanting to calculate a total cost and I'm running into errors. I've put the code below. Any help would be greatly appreciated. Thank you!

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
    // The calculate button will multiply the 3 fields that the user inputs:
    //cost*Kw used*hours used=total cost of operation
    float num1,num2, num3, result;
    //now, parse the text to a type float
    num1= Float.parseFloat (costField.getText ());
    num2= Float.parseFloat (kilowattsField.getText ());
    num3= Float.parseFloat (hoursField.getText ());
    result= (float) (num1*num2*num3);
    float num4, num5;
    num4= Float.parseFloat (gallonsField.getText ());
    num5= Float.parseFloat (costgallonsField.getText ());

    if (jComboBox1.getSelectedItem().equals("Washer"))
    result= (float) (num4*num5*num3);
    else {
    result= (float) (num1*num2*num3);


  2. #2
    gimbal2 is offline Just a guy
    Join Date
    Jun 2013
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    Default Re: trouble writing if statement with combo box

    If you run into errors, don't you think it would be a good idea to post those errors?
    "Syntactic sugar causes cancer of the semicolon." -- Alan Perlis

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