hierarchy, to allow programs to use the idiom “} catch (Exception e) { ” (§11.2.3) to catch all exceptions from which recovery may be possible without catching errors from which recovery is typically not poss
确切的说这应该是Exception。因为Error是指Java虚拟机无法解决的严重问题,如stack溢出,堆溢出... Use try and catch:可以写多个catch来捕捉不同的exception类型 publicclassMain {publicstaticvoidmain(String[ ] args) {try{int[] myNumbers = {1, 2, 3}; System.out.println(myNumbers[10]); }catch(Except...
If an error occurs, we can usetry...catchto catch the error and execute some code to handle it: Example publicclassMain{publicstaticvoidmain(String[]args){try{int[]myNumbers={1,2,3};System.out.println(myNumbers[10]);}catch(Exceptione){System.out.println("Something went wrong.");}}...
try..catch块主要用于处理异常, 一般会将可能出现问题的代码写在try块中,以处理程序中出现的程序错误,如果一个异常发生在try块中,如果异常需要被相应的程序处理,那么就使用catch块来捕获异常,并在catch块中填写处理异常的代码,就像下面的方式 try { //这里是可能出现问题的代码 }catch(Exception e){ //捕获后处...
privatestaticvoidloadInitialDrivers(){String drivers;try{drivers=AccessController.doPrivileged(newPrivilegedAction<String>(){publicStringrun(){returnSystem.getProperty("jdbc.drivers");}});}catch(Exception ex){drivers=null;}AccessController.doPrivileged(newPrivilegedAction<Void>(){publicVoidrun(){//使用SPI...
try块中发生异常后,try块中后续代码不再执行,接着会转到匹配的catch块中继续执行,如果没有任何匹配的catch则异常继续向上层方法传递。try块中的代码没有发生异常时,会正常执行所有语句,之后继续执行try/catch块后的其它代码。 一个try块可以对应多个catch,这是应对try中的语句可能产生多种不同类型异常的情况,此时的...
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....
catch可以有好几个,即一个catch捕获多个异常,也可以一个catch捕获多个异常。 //多个catch捕获多个Exception try { //code that might throw exceptions } catch (FileNotFoundException e) { //emergencyactionfor missingfiles } catch (UnknownHostException e) { //emergency actionfor unknown hosts } catch (IO...
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() { ...
public Map<String, String> handleValidationExceptions(MethodArgumentNotValidException ex) { Map<String, String> errors = new HashMap<>(); ex.getBindingResult().getAllErrors().forEach((error) -> { String fieldName = ((FieldError) error).getField(); ...