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import java.awt.*;
import java.awt.event.*;
public class MsgBox extends Dialog
implements ActionListener {
    private Button ok,can;
    public boolean isOk = false;
    /*
     * @param frame   parent frame
     * @param msg     message to be
displayed
     * @param okcan   true : ok cancel
buttons, false : ok button only
     */
    MsgBox(Frame frame, String msg,
boolean okcan){
        super(frame, "Message", true);
        setLayout(new BorderLayout());
        add("Center",new Label(msg));
        addOKCancelPanel(okcan);
        createFrame();
        pack();
        setVisible(true);
    }
    MsgBox(Frame frame, String msg){
        this(frame, msg, false);
    }
    void addOKCancelPanel( boolean
okcan ) {
        Panel p = new Panel();
        p.setLayout(new FlowLayout());
        createOKButton( p );
        if (okcan == true)
            createCancelButton( p );
        add("South",p);
    }
    void createOKButton(Panel p) {
        p.add(ok = new Button("OK"));
        ok.addActionListener(this);
    }
    void createCancelButton(Panel p) {
        p.add(can = new Button
("Cancel"));
        can.addActionListener(this);
    }
    void createFrame() {
        Dimension d = getToolkit()
.getScreenSize();
        setLocation
(d.width/3,d.height/3);
    }
    public void actionPerformed
(ActionEvent ae){
        if(ae.getSource() == ok) {
            isOk = true;
            setVisible(false);
        }
        else if(ae.getSource() == can) {
            setVisible(false);
        }
    }
    public static void main(String args
[]){
        Frame f = new Frame();
        f.setSize(200,200);
        f.setVisible(true);
        MsgBox message = new MsgBox
          (f , "Hey you user, are you
sure ?", true);
        if (message.isOk)
           System.out.println("Ok
pressed");
        if (!message.isOk)
           System.out.println("Cancel
pressed");
        message.dispose();
    }
}

Main.java:67: error: unclosed string literal
          (f , "Hey you user, are you
               ^
Main.java:67: error: ';' expected
          (f , "Hey you user, are you
                                     ^
Main.java:68: error: illegal start of expression
sure ?", true);
     ^
Main.java:68: error: unclosed string literal
sure ?", true);
      ^
Main.java:70: error: unclosed string literal
           System.out.println("Ok
                              ^
Main.java:70: error: ';' expected
           System.out.println("Ok
                                 ^
Main.java:71: error: unclosed string literal
pressed");
       ^
Main.java:71: error: ';' expected
pressed");
          ^
Main.java:72: error: not a statement
        if (!message.isOk)
           ^
Main.java:72: error: ';' expected
        if (!message.isOk)
                          ^
Main.java:73: error: unclosed string literal
           System.out.println("Cancel
                              ^
Main.java:73: error: ';' expected
           System.out.println("Cancel
                                     ^
Main.java:74: error: unclosed string literal
pressed");
       ^
Main.java:75: error: ';' expected
        message.dispose();
               ^
14 errors

Standard output is empty