}catch(Exceptione){ System.out.println("GenericExceptioncatch."); } /*Thiscatchisneverreachedbecause ArithmeticExceptionisasubclassofException.*/ catch(ArithmeticExceptione){//ERROR-unreachable System.out.println("Thisisneverreached."); } } } 如果你试着编译该程序,你会收到一个错误消息,该错误消息...
} catch(Exception e) { System.out.println("Generic Exception catch."); } /* This catch is never reached because ArithmeticException is a subclass of Exception. */ catch(ArithmeticException e) {// ERROR - unreachable System.out.println("This is never reached."); } } } 如果你试着编译该...
} catch(Exception1 |Exception2 e2){ //Exception1和Exception2类型的异常处理 } 当程序发生异常后,会按照异常从上到下(多个catch)或者从左到右(一个catch)的顺序依次匹配,匹配成功后就直接在该catch中进行处理。 2.3.2try-catch-finally try-catch-finally类型的特点是不管try块中是否监听到异常,finally块中的...
System.out.println(genericSuperclass); // com.nzc.Generic<java.lang.String> // 获取泛型接口信息 Type[] genericInterfaces = clazz.getGenericInterfaces(); for (Type genericInterface : genericInterfaces) { System.out.println(genericInterface); //interface com.nzc.TestService //com.nzc.GenericI...
public void third() throws GenericException{ first(); } public static void main(String[] args) { VerifyException ve = new VerifyException(); try { ve.first(); } catch (GenericException e) { e.printStackTrace(); } ve.second(null); ...
每个catch (异常处理程序)看起来就像是接收且仅接收一个特殊类型的参数的方法。可以在处理程序的内部使用标识符(id1,id2 等等),这与方法参数的使用很相似。有时可能用不到标识符,因为异常的类型已经给了你足够的信息来对异常进行处理,但标识符并不可以省略。
首先我们自定义一个通用的异常基类,该类继承自RuntimeException package com.hw.myp2c.common.exception; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * @author chengjian * @description * @date 18-11-10:上午11:28 */ public class GenericException extends RuntimeException{ ...
(entries.hasMoreElements()){JarEntry jarEntry=entries.nextElement();String name=jarEntry.getName();if(name.endsWith(".class")){String className=name.replace(".class","").replaceAll("/",".");classNameSet.add(className);}}}catch(Exception e){log.warn("加载jar包失败",e);}return...
What happens in the above code if there is any exception is thrown in try block ? Example :While reading file, it maythrow FileNotFoundExceptionand thus further lines intry block will not be executedand control goes to catch block.
close(); } catch (IOException ioe) { String errMsg = "Could not close input stream"; addError(errMsg, ioe); throw new JoranException(errMsg, ioe); } } } } 然后继续调用ch.qos.logback.core.joran.GenericConfigurator#doConfigure(java.io.InputStream, java.lang.String) 处理具体的内容,前面处理...