java的checked异常和unchecked异常

is‘心尘

12 年前

一、unchecked Exception：

即RuntimeException（运行时异常），不需要try…catch…或throws 机制去处理的异常
最常用的五种RuntimeException：
1.ArithmeticException

int a=0;

2.ClassCastException：

1	Object x = new Integer(0);

3.IndexOutOfBoundsException
ArrayIndexOutOfBoundsException,
StringIndexOutOfBoundsException

1	int [] numbers = { 1, 2, 3 };

4.IllegalArgumentException
NumberFormatException

5.NullPointerException

二、Checked Exception：

除了RuntimeException，其他继承自java.lang.Exception的异常统称为Checked Exception
下面是JDK API中列出的异常类:

java.lang.Object
java.lang.Throwable
java.lang.Exception
所有已实现的接口：
Serializable
直接已知子类：
AclNotFoundException, ActivationException, AlreadyBoundException, ApplicationException, AWTException, BackingStoreException, BadAttributeValueExpException, BadBinaryOpValueExpException, BadLocationException, BadStringOperationException, BrokenBarrierException, CertificateException, ClassNotFoundException, CloneNotSupportedException, DataFormatException, DatatypeConfigurationException, DestroyFailedException, ExecutionException, ExpandVetoException, FontFormatException, GeneralSecurityException, GSSException, IllegalAccessException, IllegalClassFormatException, InstantiationException, InterruptedException, IntrospectionException, InvalidApplicationException, InvalidMidiDataException, InvalidPreferencesFormatException, InvalidTargetObjectTypeException, InvocationTargetException, IOException, JAXBException, JMException, KeySelectorException, LastOwnerException, LineUnavailableException, MarshalException, MidiUnavailableException, MimeTypeParseException, MimeTypeParseException, NamingException, NoninvertibleTransformException, NoSuchFieldException, NoSuchMethodException, NotBoundException, NotOwnerException, ParseException, ParserConfigurationException, PrinterException, PrintException, PrivilegedActionException, PropertyVetoException, RefreshFailedException, RemarshalException, RuntimeException, SAXException, ScriptException, ServerNotActiveException, SOAPException, SQLException, TimeoutException, TooManyListenersException, TransformerException, TransformException, UnmodifiableClassException, UnsupportedAudioFileException, UnsupportedCallbackException, UnsupportedFlavorException, UnsupportedLookAndFeelException, URIReferenceException, URISyntaxException, UserException, XAException, XMLParseException, XMLSignatureException, XMLStreamException, XPathException