Thread: GUI errors

I have been trying to figure out these errors and I am stuck. You guys are good at seeing what I can not, thanks!

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
public class GUIWindow extends JFrame{
 
	//private Circle circ = new Circle();
 
private JLabel radiusLabel            = new JLabel("Radius");
private JLabel areaLabel              = new JLabel("Area");
private TextField radiusField          = new JTextField("3.14");
private TextField areaField            = new JTextField("0.0");
private JButton radButton             = new JButton("Convert >>>");
 
 public GUIWindow(){
   JPanel dataPanel = new JPanel(new GridLayout(2,2,12,6));
   dataPanel.add(radiusLabel);
   dataPanel.add(areaLabel);
   dataPanel.add(radiusField);
   dataPanel.add(areaField);
   JPanel buttonPanel                  = new JPanel();
   buttonPanel.add(radButton);
   Container container = getContentPane();
   container.add(dataPanel, BorderLayout.CENTER);
   container.add(buttonPanel, BorderLayout.SOUTH);
 
   radButton.addActionListener(new RadiusListener());
 }
 
 private class RadiusListener implements ActionListener{
    public void actionPerformed(ActionEvent e){
 
       String input = radiusField.getText();
       double rad = Double.parseDouble(input);
       rad.setRadius(rad);
       double area = rad.getArea();
       areaField.setText("" + area);
       }
       }
       }

the errors:

E:\JavaCh8SR\ConvertWithGUI.java:10: cannot find symbol
symbol : method setVisable(boolean)
location: class GUIWindow
theGUI.setVisable(true);
^
.\GUIWindow.java:11: incompatible types
found : javax.swing.JTextField
required: java.awt.TextField
private TextField radiusField = new JTextField("3.14");
^
.\GUIWindow.java:12: incompatible types
found : javax.swing.JTextField
required: java.awt.TextField
private TextField areaField = new JTextField("0.0");
^
.\GUIWindow.java:35: double cannot be dereferenced
rad.setRadius(rad);
^
.\GUIWindow.java:36: double cannot be dereferenced
double area = rad.getArea();
^


and the main:

import javax.swing.*;
 
public class ConvertWithGUI{
 
public static void main(String[] args){
GUIWindow theGUI = new GUIWindow();
theGUI.setTitle("Radius Converter");
theGUI.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
theGUI.pack();
theGUI.setVisable(true);
}
}