import org.apache.harmony.javax.security.sasl.RealmChoiceCallback; //导入依赖的package包/类
/**
 * 
 */
public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
    for (int i = 0; i < callbacks.length; i++) {
        if (callbacks[i] instanceof NameCallback) {
            NameCallback ncb = (NameCallback)callbacks[i];
            ncb.setName(authenticationId);
        } else if(callbacks[i] instanceof PasswordCallback) {
            PasswordCallback pcb = (PasswordCallback)callbacks[i];
            pcb.setPassword(password.toCharArray());
        } else if(callbacks[i] instanceof RealmCallback) {
            RealmCallback rcb = (RealmCallback)callbacks[i];
            rcb.setText(hostname);
        } else if(callbacks[i] instanceof RealmChoiceCallback){
            //unused
            //RealmChoiceCallback rccb = (RealmChoiceCallback)callbacks[i];
        } else {
           throw new UnsupportedCallbackException(callbacks[i]);
        }
     }
}
 

import org.apache.harmony.javax.security.sasl.RealmChoiceCallback; //导入依赖的package包/类
/**
    * 
    */
public void handle(Callback[] callbacks) throws IOException,
		UnsupportedCallbackException {
	for (int i = 0; i < callbacks.length; i++) {
		if (callbacks[i] instanceof NameCallback) {
			NameCallback ncb = (NameCallback) callbacks[i];
			ncb.setName(authenticationId);
		} else if (callbacks[i] instanceof PasswordCallback) {
			PasswordCallback pcb = (PasswordCallback) callbacks[i];
			pcb.setPassword(password.toCharArray());
		} else if (callbacks[i] instanceof RealmCallback) {
			RealmCallback rcb = (RealmCallback) callbacks[i];
			rcb.setText(hostname);
		} else if (callbacks[i] instanceof RealmChoiceCallback) {
			// unused
			// RealmChoiceCallback rccb = (RealmChoiceCallback)callbacks[i];
		} else {
			throw new UnsupportedCallbackException(callbacks[i]);
		}
	}
}