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.
3.2 异常处理程序 - catch 块 抛出的异常必须在 异常处理程序 得到处理。针对每个要捕获的异常,得准备相应的处理程序。 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 excep...
1.检查型异常 (Checked exceptions):从 Exception 类继承的异常都是检查型异常(checked exceptions),客户端必须处理API抛出的这类异常,通过catch子句捕获或是通过throws子句继续抛出(forwarding it outward)。 2.非检查型异常 (Unchecked exceptions):RuntimeException 也是 Exception 的子类,然而,从RuntimeException 继承...
Similarly, only this class or one of its subclasses can be the argument type in a catch clause. For the purposes of compile-time checking of exceptions, Throwable and any subclass of Throwable that is not also a subclass of either RuntimeException or Error are regarded as checked exceptions....
随着 Java 语言的发展,引入了一些更加便利的特性,比如 try-with-resources 和 multiple catch,具体可以参考下面的代码段。在编译时期,会自动生成相应的处理逻辑,比如,自动按照约定俗成 close 那些扩展了 AutoCloseable 或者 Closeable 的对象。 代码语言:javascript...
} catch (NullPointerException npe) { // ... } 1. 2. 3. 4. 5. 6. 7. 备选方案1:异常A是由异常B引起的您可以使用cause-constructor 嵌套例外来执行以下操作: try { Exception ex1 = new NullPointerException(); // Throw an IllegalArgumentException that "wraps" ex1 ...
通过Java 7 的多重捕获机制,你可以使用“或”将不同类型的异常组合起来,只需要一行 catch 语句: // exceptions/MultiCatch.java public class MultiCatch { void x() throws Except1, Except2, Except3, Except4 {} void process() {} void f() { ...
Bug fixes and any other changes are listed below in date order, most current BPR first. Note that bug fixes in previous BPR are also included in the current BPR. To determine the version of your JDK software, use the following command: java -version Changes in Java SE 8u20 b32 Bug ...
importjava.io.PrintWriter;importjava.io.StringWriter;importjava.util.logging.Logger;publicclassLoggingExceptions{publicstaticvoidmain(String[] args){try{thrownewLoggingException(); }catch(LoggingException e){ System.out.println("Caught "+e);
A look at the try/catch block in Java: how it is made up, and how it can span multiple lines and include multiple exceptions.