codice:
HelloMidlet.java:62: setCommandListener(javax.microedition.lcdui.CommandListener) in javax.microedition.lcdui.Displayable cannot be applied to (hello.HelloMidlet)
        form.setCommandListener(this);

HelloMidlet.java:66: setCommandListener(javax.microedition.lcdui.CommandListener) in javax.microedition.lcdui.Displayable cannot be applied to (hello.HelloMidlet)
        tbAction.setCommandListener(this);

2 errors