compile error -

java applet:

keep getting compile error:

---------- Javac ----------
Radio.java:15: 'class' or 'interface' expected
public void init() {
^
Radio.java:8: Radio should be declared abstract; it does not define itemStateChanged(java.awt.event.ItemEvent) in Radio
class Radio extends Applet implements ItemListener {
^
2 errors
Normal Termination
Output completed (0 sec consumed).

heres my code:

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.applet.Applet;



class Radio extends Applet implements ItemListener {

CheckboxGroup oneCBG;
Checkbox cbMale, cbFemale;
TextField gender;
}

public void init() {
oneCBG = new CheckboxGroup();

cbMale = new Checkbox("Male", false, oneCBG);
add(cbMale);
cbMale.addItemListener(this);

cbFemale = new Checkbox("Female", false, oneCBG);
add(cbFemale);
cbFemale.addItemListener(this);

gender = new TextField(7);
}


public void itemStateChanged(ItemEvent e) {
if (e.getItemSelectable() ==cbMale) {
gender.setText("Male");
}
if (e.getItemSelectable() ==cbFemale) {
gender.setText("Female");
}
}

can someone point me in the right direction?

Move the subroutines inside the classes braces, i.e.

Code:

---

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.applet.Applet;

class Radio extends Applet implements ItemListener {

 CheckboxGroup oneCBG;
 Checkbox cbMale, cbFemale;
 TextField gender;

 public void init() {
  oneCBG = new CheckboxGroup();

  cbMale = new Checkbox("Male", false, oneCBG);
  add(cbMale);
  cbMale.addItemListener(this);

  cbFemale = new Checkbox("Female", false, oneCBG);
  add(cbFemale);
  cbFemale.addItemListener(this);

  gender = new TextField(7);
 }

 public void itemStateChanged(ItemEvent e) {
  if (e.getItemSelectable() ==cbMale) {
    gender.setText("Male");
  }
  if (e.getItemSelectable() ==cbFemale) {
    gender.setText("Female");
  }
 }
}

---

thanks, those braces drive you nutty when your beginning to learn java!

now that I've got those radio buttons working, I want to include them in my [b]application[b] (that was working till I tried to add the radio buttons!)

I do not understand what the compile error is telling me - could you exxplain, please?

---------- Javac ----------
System1.java:22: missing method body, or declare abstract
public void init();{
^
1 error
Normal Termination
Output completed (0 sec consumed).

?declare abstract?

here my application code:

Code:

---

import java.awt.*;
import java.awt.event.*;
import java.io.*;



class System1 extends Frame implements WindowListener, ActionListener, ItemListener {


                static Button load;
                static TextArea myTextArea;
                static Label fNameLabel;
                static Label sNameLabel;
                static TextField Firstname;
                static TextField Surname;

                CheckboxGroup oneCBG;
            Checkbox cbMale, cbFemale;
                static TextField gender;
       

public void init();{
oneCBG = new CheckboxGroup();

cbMale = new Checkbox("Male", false, oneCBG);
add(cbMale);
cbMale.addItemListener(this);

cbFemale = new Checkbox("Female", false, oneCBG);
add(cbFemale);
cbFemale.addItemListener(this);

gender = new TextField(7);
add(gender);
}

public void itemStateChanged(ItemEvent e) {
                if (e.getItemSelectable() ==cbMale) {
        gender.setText("Male");
                }
                if (e.getItemSelectable() ==cbFemale) {
        gender.setText("Female");
                }
                }
               

    public static void main (String [] args) {


        // create an instance of the ExampleFrame object
        System1 demo = new System1();
        // set Layout manager to Flow Layout, like an applet
        demo.setLayout(new FlowLayout());
        // set size
        demo.setSize(400,300); // increase size to display text area
        // register listener for window events, eg close
        demo.addWindowListener(demo);


//add checkboxes

        // create a text area and add  it to the frame
        // create and add button
       
        // create and add label and text field
        fNameLabel = new Label("Firstname:");
        demo.add(fNameLabel);
        Firstname = new TextField(25);
        demo.add(Firstname);

sNameLabel = new Label("Surname:");
        demo.add(sNameLabel);
        Surname = new TextField(25);
        demo.add(Surname);

load = new Button("Load");
        demo.add(load);
        load.addActionListener(demo);

        myTextArea = new TextArea("",10,50);
        demo.add(myTextArea);
   
        // make Frame visible
        demo.setVisible(true);
    }


//public void itemStateChanged(ItemEvent e) {
  //  if (e.getItemSelectable() ==cbMale) {
  //      gender.setText("Male");
  //  }
  //if (e.getItemSelectable() ==cbFemale) {
  //      gender.setText("Female");
  //  }
  // }

    // button handler
    public void actionPerformed(ActionEvent evt) {

        // get file name and insert text into text area
        String filename = (Firstname.getText()).trim();   
       
        // Load button pressed ?
        if (evt.getSource()== load) {
            String s = readTextFile(filename);
            myTextArea.insert(s, 0);} // insert text at start
       
      }
public static String readTextFile(String filename) {
   
    BufferedReader inFile;
    String line, s = "";  // intialize s

   
    try

    {
        inFile = new BufferedReader(new FileReader(filename));

        while ( (line = inFile.readLine()) != null )
        {
            s = s + line + "\n"; // concatenate onto s, WITH
// AN EXTRA NEW LINE
        }
        inFile.close();
    }
    catch (IOException e)
    {
        System.out.println("Error in file " + filename + " : "    +  e.toString() );
        System.exit(1);  // better if -1, means standard error
    }
   
    return s;
// return s
}
//**********************************
    // code to handle closing the window
    public void windowClosing(WindowEvent e) {
        System.exit(0);
    }
   


    //unused empty WindowListener Methods --- needed to enable a            // compile
    public void windowIconified(WindowEvent e) {
    }
    public void windowOpened(WindowEvent e) {
    }
    public void windowClosed(WindowEvent e) {
    }
    public void windowDeiconified(WindowEvent e) {
    }
    public void windowActivated(WindowEvent e) {
    }
    public void windowDeactivated(WindowEvent e) {
    }
}

---

Try removing the semicolon from public void init();{

thanks for that, although it compiled, the radio buttons did not appear.

I think I will have to go back to the books for a whle before I try any more! :mad: