how to use exceptions java

public class ExceptionTypeTest { public void doSomething()throws ArithmeticException{ System.out.println(); } public static void main(){ ExceptionTypeTest ett = new ExceptionTypeTest(); ett.doSomething(); } }Question 1: Can the above program be compiled? And describe the reasons. A: It can be compiled. Analysis: according to common sense, the dosomething method defines the arithmeticexception and calls this method in the main method. You should con

Static voidmethod2 () {137 intA = 10;138 intb = 0;139 Try { $System.out.println (A/b);141}Catch(ArithmeticException e) {142SYSTEM.OUT.PRINTLN ("Divisor cannot be 0");143 }144 145 int[] arr = {1, 2, 3 };146 Try {147System.out.println (arr[3]);148}Catch(arrayindexoutofboundsexception e) {149SYSTEM.OUT.PRINTLN ("You have access to an index that should not be accessed"); Max }151 theSystem.out.println ("Over");153 }154 155 //an except

"Login successful" execution C Plan () case else ticket () end select end sub In this way, the UI Layer has to know exactly what strings are returned by the BLL layer. Of course, this actually cannot be said. Note clearly in the document. However, the coupling between the UI Layer and the BLL layer is not much to be said. Let's take a look at the code below: Bll Layer Code: Public Function login () as Boolean if the user does not exist then throw new exception ("user does not exist")

1 /*2 differences between compile-time exceptions and run-time exceptions3 　　 Compile-time exception : the Java program must show processing, or the program will have an error that cannot be compiled4 　　 Run -time exception: No display processing is required, and can be treated as a compile-time exception5 */6 Importjava.text.ParseException;7 ImportJava.text.SimpleDateFormat;8 Importjava.util.Date;9 P

://blog.csdn.net/he90227/article/details/46309297Http://www.cnblogs.com/chenpi/p/6117090.htmlhttp://blog.csdn.net/ufo2910628/article/details/40399539Http://www.cnblogs.com/xd502djj/archive/2012/09/24/2700490.htmlIn summary, there are three main methods of centralized treatment(1) using the simple exception processor Simplemappingexceptionresolver provided by spring MVC;(2) Implement spring's exception handling interface (Handlerexceptionresolver) to customize its own exception handler;(3) using

Used to handle specific problems that may occur in your project, and to customize the exception encapsulation for these issues. Exceptiontest.java Public classExceptiontest { Public Static voidMain (string[] args) {Divdemo dd=NewDivdemo (); intResultd; Try{Resultd= Dd.div (10,-1); System.out.println ("Resultd ' value is:" +Resultd); } Catch(ArithmeticException e) {System.out.println ("Arithmetic exception:" +e.tostring ()); } Catch(fushuexception e) {System.out.println ("Fushu Exception:" +e.

Author: MaverickBlog:Http://blog.csdn.net/zhaohuabing reprinted please indicate the source1 IntroductionBefore the emergence of the Java language, traditional Exception Handling Methods mostly use return values to identify exceptions in programs. Although this method is familiar to programmers, it has many disadvantages. First, an API can return arbitrary return

occur during the program running ). 2.3.2 logic_error in C ++ is equivalent to RuntimeException in Java, while runtime_error is equivalent to non-RuntimeException type exceptions in Java. 3. How to Use exceptions 3.1 declaration method throw an exception 3.1.1 Syntax: throw