How to make JTextField into String/Long?

Question

Currently Having my fields like that:

 final JTextField PID = new JTextField("Product ID", 7);
 frame.getContentPane().add(PID);

My method:

public StockItem(Long id, String name, String desc, double price) {
    this.id = id;
    this.name = name;
    this.description = desc;
    this.price = price;
}

Trying to use this method with values from my JTextFields, but it does not allow to use JTextFields under my Long/String/double places. Is there any way how I could convert my JTextFields into the required things without editing my Method.

A `JTextField` will always contain text (String). You can parse, transform, do whatever you want with that. If you want to have a UI control, that allows only numbers, then you can use `JSpinner` for example. — Balázs Édes, Oct 27 '14 at 12:16
See [this answer](http://stackoverflow.com/a/13424140/1076463) for an example using `JFormattedTextField` — Robin, Oct 27 '14 at 12:57

score 1 · Accepted Answer · answered Oct 27 '14 at 12:29

1

You should use the text field text and parse it.

long l = Long.parseLong(PID.getText());
double d = Double.parseDouble(PID.getText());

answered Oct 27 '14 at 12:29

cholewa1992

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Please beware that you have to try catch the parsing as the textfild may contain something that is not a long or double. Check this article: http://alvinalexander.com/java/edu/qanda/pjqa00011.shtml – cholewa1992 Oct 27 '14 at 12:34
Can I do anything like that with a String too? – OFFLlNE Oct 27 '14 at 15:05
String s = PID.getText(); – cholewa1992 Oct 27 '14 at 15:08

score 0 · Answer 2 · answered Oct 27 '14 at 13:39

Yes, you can use PID.getText() to get the text, and then you can convert it to whatever you want, like this:

try{
    long id = Long.parseLong(PID.getText());
    String name = PNAME.getText();
    String description = PDESC.getText();
    double price = Double.parseDouble(PPRICE.getText());
}catch(Exception e){}

I have used the try-catch block because if the user enters something else instead of long in the PID, then it will catch the exception.

How to make JTextField into String/Long?

2 Answers2