Error是程序无法处理的错误,比如OutofMemoryError、TheadDeath等。Exception是程序本身可以处理的异常,应当尽可能去处理这些异常。运行时异常都是RuntimeException类及其子类异常,这些异常是不检查异常,程序中可以选择捕获处理,也可以不处理,如NullPointerException。通常,这些异常一般是由错误代码逻辑引起的,我们应该从逻辑角度...
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. Java rethrow exception Another improvement is ...
publicclassRethrowException{publicstatic<TextendsException, R> RthrowException(Exception t)throwsT {throw(T) t;// just throw it, convert checked exception to unchecked exception} } 上面的类中,我们定义了一个throwException方法,接收一个Exception参数,将其转换为T,这里的T就是unchecked exception。 接下来...
public class RethrowException { public static <T extends Exception, R> R throwException(Exception t) throws T { throw (T) t; // just throw it, convert checked exception to unchecked exception } } 上面的类中,我们定义了一个throwException方法,接收一个Exception参数,将其转换为T,这里的T就是unch...
public class RethrowException {public static <T extends Exception, R> R throwException(Exception t) throws T {throw (T) t; // just throw it, convert checked exception to unchecked exception}} 1. 上面的类中,我们定义了一个throwException方法,接收一个Exception参数,将其转换为T,这里的T就是unchec...
public class RethrowUsage { public static void main(String[] args) { try { throwIOException();} catch (IOException e) { log.error(e.getMessage(),e);RethrowException.throwException(e);} } static void throwIOException() throws IOException{ throw new IOException("io exception");} } 上⾯的...
Exception in thread "main" java.nio.file.NoSuchFileException: players.dat <-- players.dat file doesn't exist at sun.nio.fs.WindowsException.translateToIOException(Unknown Source) at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source) // ... at java.nio.file.Files.readAllLines(Unk...
1publicclassRethrow {2publicstaticvoidreadFile(String file)throwsFileNotFoundException {3try{4BufferedInputStream in =newBufferedInputStream(newFileInputStream(file));5}catch(FileNotFoundException e) {6e.printStackTrace();7System.err.println("不知道如何处理该异常或者根本不想处理它,但是不做处理又不合适...
thrownewNullPointerException("t = null"); 复制 关键字throw将产生许多有趣的结果。在使用new创建了异常对象之后,此对象的引用将传给throw。 尽管异常对象的类型通常与方法设计的返回类型不同,但从效果上看,它就像是从方法“返回”的。可以简单地把异常处理看成一种不同的返回机制,当然若过分强调这种类比的话,...
private void reportException(int s) { if (s == CANCELLED) throw new CancellationException(); if (s == EXCEPTIONAL) rethrow(getThrowableException()); } 来看下doJoin方法: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 private int doJoin() { int s; Thread t; ForkJoinWorkerThread wt;...