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Thread: Can't put decimals in my textfields?

  1. #1
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    Default Can't put decimals in my textfields?

    I have this chunk of code. It's a simple BMI calculator, but I've noticed that I can only enter whole numbers into my textfields. What can I do to allow decimals?

    import java.applet.*;
    import java.awt.*;
    import java.awt.event.*;
    public class BMICALC extends Applet implements ActionListener
    {
    	int in, lbs;
    	double m, kg, bmi;
     
    	Label titleLabel = new Label ("Body Mass Index Calculator");
    	//
    	Label hLabel = new Label ("Enter your height in inches: ");
    	TextField hField = new TextField(10);
    	//
    	Label wLabel = new Label ("Enter your weight in pounds: ");
    	TextField wField = new TextField(10);
    	//
    	Button bmiButton = new Button("Calculate");
    	Label oLabel = new Label ("Click Calculate to see your body mass index.");
     
    	public void init()
    	{
    		setForeground(Color.white);
    		setBackground(Color.black);
    		add(titleLabel);
    		add(hLabel);
    		setForeground(Color.black);
    		add(hField);
    		setForeground(Color.white);
    		add(wLabel);
    		setForeground(Color.black);
    		add(wField);
    		add(bmiButton);
    		setForeground(Color.white);
    		bmiButton.addActionListener(this);
    		setForeground(Color.green);
    		add(oLabel);
    	}
     
     
    	public void actionPerformed(ActionEvent k)
    	{
     
    		in = Integer.parseInt(hField.getText());
    		lbs = Integer.parseInt(wField.getText());
    		m = in / 39.36;
    		kg = lbs / 2.2;
    		bmi = kg / Math.pow(m,2);
    		oLabel.setText("Your body mass index is " + Math.round(bmi) + ".");
    	}
    }


  2. #2
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    Default Re: Can't put decimals in my textfields?

    An integer is a non decimal number, so you might want to parse the input to a different type of number.

    Rolf

  3. #3
    Super Moderator Norm's Avatar
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    Default Re: Can't put decimals in my textfields?

    See the Double and Float classes for other parse methods that take decimal numbers.
    If you don't understand my answer, don't ignore it, ask a question.

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