public class Java7MultipleExceptions { public static void main(String[] args) { try{ rethrow("abc"); }catch(FirstException | SecondException | ThirdException e){ //below assignment will throw compile time exception since e is final //e = new Exception(); System.out.println(e.getMessage()...
异常处理程序紧跟在 try 块之后,以关键字 catch 表示: try{// Code that might generate exceptions}catch(Type1 id1){// Handle exceptions of Type1}catch(Type2 id2){// Handle exceptions of Type2}catch(Type3 id3){// Handle exceptions of Type3} 复制 每个catch (异常处理程序)看起来就像是接收...
3.The try-with-resources Statement——可以声明一个或者多个资源 4.Catching Multiple Exception Types and Rethrowing Exceptions with Improved Type Checking——同时捕获多个异常类型并重新抛出异常 5.Underscores in Numeric Literals——数组文字下划线 6.Type Inference for Generic Instance Creation 7.Improved Compi...
Checked exceptions:编译时可检查的异常Runtime exceptions:运行时异常Errors:发生错误 异常的体系(Exception Hierarchy) Throwable Exception IOExceptionRuntimeExceptionError 异常的Methods(Exceptions Methods) 略 捕获异常(Catching Exceptions) try/catch 块 多个catch块(Multiple catch Blocks) try { //Protected code }...
If you arecatching a lot of exceptions in a singletryblock, you will notice that thecatchblock code mostly consists of redundant code to log the error. In Java 7, one of the features was an improvedcatchblock where we can catch multiple exceptions in a singlecatchblock. Here is an exampl...
Catching Multiple Exception Types and Rethrowing Exceptions with Improved Type Checking- A single catch block can handle more than one type of exception. In addition, the compiler performs more precise analysis of rethrown exceptions than earlier releases of Java SE. This enables you to specify more...
Multiple catches give us the chance to handle each exception differently, should the need arise. Also note here that we didn’t catchFileNotFoundException, and that is because itextends IOException. Because we’re catchingIOException, Java will consider any of its subclasses also handled. ...
The other rather significant benefit of exceptions is that they clean up error handling code. Instead of checking for a particular error and dealing with it at multiple places in your program, you no longer need to check at the point of the method call (since the exception will guarantee tha...
The root class for exceptions thrown by JMS API methods is JMSException. Catching JMSException provides a generic way of handling all exceptions related to the JMS API. The JMSException class includes the following subclasses, which are described in the API documentation:IllegalStateException ...
They can do error recovery, prompt the user to make a decision, or propagate the error up to a higher-level handler using chained exceptions, as described in the Chained Exceptions section. Catching More Than One Type of Exception with One Exception Handler In Java SE 7 and later, a ...