If a catch block handles multiple exceptions, you can separate them using a pipe (|) and in this case, exception parameter (ex) is final, so you can’t change it. The byte code generated by this feature is smaller and reduce code redundancy.
If any other exception occurs, the second catch block handles it. Example 3: Catching Multiple Exceptions in One Block public class MultiCatchExample { public static void main(String[] args) { try { String text = null; System.out.println(text.length()); // This will throw NullPointer...
Here, themultiCatch()function has two arguments. The first one is avararg, containing the types of “multiple exceptions.” A function will be executed if any exception in the definedexceptionsoccurs.This function is the second argument:thenDo(). As we can see in the code above, we wrap ...
但是它将导致ArrayIndexOutOf BoundsException异常,因为整型数组c的长度为1,而程序试图给c[42]赋值。 下面是运行在两种不同情况下程序的输出: C:\>java MultiCatch a = 0 Divide by 0: java.lang.ArithmeticException: / by zero After try/catch blocks. C:\>java MultiCatch TestArg a = 1 Array index...
java import java.util.InputMismatchException; import java.util.Scanner; public class MultipleCatchExample { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); try { System.out.print("Enter a number: "); int number ...
为防止和处理一个运行时错误,只需要把你所要监控的代码放进一个try块就可以了。紧跟着try块的,包括一个说明你希望捕获的错误类型的catch子句。完成这个任务很简单,下面的程序包含一个处理因为被零除而产生的ArithmeticException 异常的try块和一个catch子句。
Divide by 0: java.lang.ArithmeticException: / by zero After try/catch blocks. C:\>java MultiCatch TestArg a = 1 Array index oob: java.lang.ArrayIndexOutOfBoundsException After try/catch blocks. 当你用多catch语句时,记住异常子类必须在它们任何父类之前使用是很重要的。这是因为运用父类的catch...
catch 和 finally 一起使用的常见方式是：在 try 块中获取并使用资源，在 catch 块中处理异常情况，并...
<route> <from uri="direct:start"/> <!-- here the try starts. its a try .. catch .. finally just as regular java code --> <doTry> <process ref="processorFail"/> <to uri="mock:result"/> <doCatch> <!-- catch multiple exceptions --> <excep...
}catch(Exception_class_Name ref){ } 1. 2. 3. 4. The syntax of a try-finally block try{ //code that may throw exception }finally{} 1. 2. 3. Nested try block The try block within a try block is known as nested try block in java. ...