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Thread: GUI, textarea help, line by line string

  1. #1
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    Default GUI, textarea help, line by line string

    how can I show multiple lines on gui textField, right now it will only show the latest "value". Please click on the link below to see the GUI output. Notice it's only showing the 2 $1.

    https://drive.google.com/file/d/0B2-...it?usp=sharing

    GUI Code

        private void paymentTextFieldActionPerformed(java.awt.event.ActionEvent evt) {                                                 
     
            double payment = Double.parseDouble(paymentTextField.getText());
            paymentTextField.setText(fmt.format(payment));
     
            finalChange = payment - allTotal;
            change.setText(String.valueOf(fmt.format(finalChange)));
     
            int dollar;
            double cent;
            dollar = (int)finalChange % 1000000;
            cent = finalChange - dollar;
     
            if((dollar / 100) >= 1)
            {
                changeTextArea.setText(dollar / 100 + " $100");
                dollar = dollar - 100 * (dollar / 100);
            }
     
            if((dollar / 50) >= 1)
            {
                changeTextArea.setText(dollar / 50 + " $50");
                dollar = dollar - 50 * (dollar / 50);
            }
     
            if((dollar / 20) >= 1)
            {
                changeTextArea.setText(dollar / 20 + " $20");
                dollar = dollar - 20 * (dollar / 20);
            }
     
            if((dollar / 10) >= 1)
            {
                changeTextArea.setText(dollar / 10 + " $10");
                dollar = dollar - 10 * (dollar / 10);
            }
     
            if((dollar / 5) >= 1)
            {
                changeTextArea.setText(dollar / 5 + " $5");
                dollar = dollar - 5 * (dollar / 5);
            }
     
            if((dollar / 1) >= 1)
            {
                changeTextArea.setText(dollar / 1 + " $1");
            }      
     
        }

    test code output, what I want the GUI above to look like

    1 $5
    2 $1
    3 $0.01

    test code

    package correctchange;
     
    public class CorrectChange {
     
        public static void main(String[] args) {          
     
            double change = 7.03;
     
            int dollar;
            double cent;
            dollar = (int)change % 1000000;
            cent = change - dollar;
     
            // dollar calculation
     
            if((dollar / 100) >= 1)
            {
                System.out.println(dollar / 100 + " $100");
                dollar = dollar - 100 * (dollar / 100);
            }
     
            if((dollar / 50) >= 1)
            {
                System.out.println(dollar / 50 + " $50");
                dollar = dollar - 50 * (dollar / 50);
            }
     
            if((dollar / 20) >= 1)
            {
                System.out.println(dollar / 20 + " $20");
                dollar = dollar - 20 * (dollar / 20);
            }
     
            if((dollar / 10) >= 1)
            {
                System.out.println(dollar / 10 + " $10");
                dollar = dollar - 10 * (dollar / 10);
            }
     
            if((dollar / 5) >= 1)
            {
                System.out.println(dollar / 5 + " $5");
                dollar = dollar - 5 * (dollar / 5);
            }
     
            if((dollar / 1) >= 1)
            {
                System.out.println(dollar / 1 + " $1");
            }
     
            // cents calculation        
     
            if((cent / 0.25) >= 1.00)
            {
                System.out.println((int)(cent / 0.25) + " $0.25");
                cent = cent - 0.25 * (cent / 0.25);
            }
     
            if((cent / 0.10) >= 1.00)
            {
                System.out.println((int)(cent / 0.10) + " $0.10");
                cent = cent - 0.10 * (cent / 0.10);
            }
     
            if((cent / 0.05) >= 1.00)
            {
                System.out.println((int)(cent / 0.05) + " $0.05");
                cent = cent - 0.05 * (cent / 0.05);
            }
     
            if((cent / 0.01) >= 1.00)
            {
                System.out.println((int)(cent / 0.01) + " $0.01");
    //            cent = cent - 0.01 * (cent / 0.01);
            }
     
        }
    }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: GUI, textarea help, line by line string

    how can I show multiple lines on gui textField, right now it will only show the latest
    Read the API doc for the JTextArea class. There are methods to set the text to a String and to append a String to what is there.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: GUI, textarea help, line by line string

    Quote Originally Posted by Norm View Post
    Read the API doc for the JTextArea class. There are methods to set the text to a String and to append a String to what is there.
    Thank you, I'll try that

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