java的throw和throws（Throwss throw and Java）.docVIP

java的throw和throws（Throwss throw and Java） Java anomaly is divided into: Runtime abnormalities, abnormal Checked. Runtime anomaly (abnormal running process): examples and RuntimeException classes. Abnormal Checked (running before you know some abnormal): not Runtime abnormal instances are abnormal Checked. Throws: can only be used in the method signature, throw is the exception class, between a plurality of exception classes separated by commas, catch multiple different | separated as (catch (Exception1|Exception2)). Such as the use of: Void ini (throws) IndexOutOfBoundsException, ClassCastException { } Effect: a method may produce abnormal. Exception handling: different anomalies, handled in a different way (see one, two). Throws throws two abnormal: A: if the thrown exception is Runtime, there are two ways to deal with a situation: ======================================= 1, with try{} abnormal catch{} capture processing throws the following class A: Class A { Void (set) { Try { / / throw a Runtime New (RuntimeException) / /: constructing a detailed information for the new null runtime exception instance Throw new (RuntimeException); } Catch (Exception E) { System.out.println (catch block Rutime anomaly); } } Public static void main (String[] rags) { New (A) (.Set); } } 2, without any treatment (i.e. to Java virtual machine processing, printing processing results: abnormal tracking stack information after the termination of operation procedures, such as example three below) without treatment. Two: if the thrown exception is Checked, it must be dealt with, there are two types of treatment: two ===================================== 1, call throws method, this method is called the statement in the try block explicitly catch the exception, as the following example; 2, will call this method (an abnormal method) by using the method of throws statement throws an exception, such as two examples below. Throw is thrown exception instance, and each can only throw an exception