public ExceptionManager(String msg){

　　super(msg);

　　}

　　/**

　　* Constructs a new instance with the specified detail cause. The concrete handler

　　* is its super class. This constructor always used to wrap an exist exception.

　　*

　　* @param throwable the cause which has been caught. It's detail message and

　　* stacktrace are the parts the information will be shown.

　　*/

　　public ExceptionManager(Throwable throwable){

　　super(throwable);

　　}

　　/**

　　* Constructs a new instance with the specified detail message and cause. The

　　* concrete handler is its super class. This constructor always used to construct

　　* an exception wrapping the exist exception but requires a custom message.

　　*

　　* @param msg the detail message which is the part of the information will

　　* be shown.

　　* @param throwable the cause which has been caught. It's stacktrace is the parts

　　* the information will be shown.

　　*/

　　public ExceptionManager(String msg,Throwable throwable){

　　super(msg,throwable);

　　}

　　/**

　　* Show the information with everything is default.

　　*/

　　public synchronized void alert(){

　　alert((Component)null);

　　}

　　/**

　　* Show the information in a dialog with the specified title

　　* "ThrowableManager Alerter". The dialog belongs to the given component which

　　* default is the screen.

　　*

　　* @param parent The component cause the exception.

　　*/

　　public synchronized void alert(Component parent){

　　alert(parent,"ThrowableManager Alerter");

　　}

　　/**

　　* Show the information in a dialog with the specified title.

　　*

　　* @param title The title of the dialog.

　　*/

　　public synchronized void alert(String title){

　　alert((Component)null,title);

　　}

　　/**

　　* Show the information in a dialog which has the specified title and belongs to the

　　* specified component.

　　*

　　* @param parent The component cause the exception.

　　* @param title The title of the dialog.

　　*/

　　public synchronized void alert(Component parent,String title){

　　StringBuilder errorMessage=new StringBuilder();

　　errorMessage.append(this.toString());

　　for (StackTraceElement st:((this.getCause()==null)?this:this.getCause()).getStackTrace()){

　　errorMessage.append("\n\t at ");

　　errorMessage.append(st.toString());

　　}

　　alerter.showMessageDialog(parent, errorMessage, title ,JOptionPane.ERROR_MESSAGE);

　　}

　　}

　　　　　　　計算機等級考試二級Java練習題及答案匯總