// try-finally is ugly when used with more than one resource!staticvoidcopy(String src, String dst)throwsIOException {InputStreamin=newFileInputStream(src);try{OutputStreamout=newFileOutputStream(dst);try{byte[] buf =newbyte[BUFFER_SIZE];intn;while((n = in.read(buf)) >=0) out.write(...
try{ System.out.println("doing somethings"); }finally{ resource.close(); } } java7新增了tryWithResource语句专门用于处理资源关闭的情况,基本结构为:try(){} publicclassTryWith{ privateclassResourceimplementsAutoCloseable{ @Override publicvoidclose()throwsException { System.out.println("resource is clos...
【举例】:利用try...catch...finally 结构进行异常处理 代码语言:javascript 代码运行次数:0 运行 AI代码解释 System.out.println("AAAA");try{int result=10/0;System.out.println("计算="+result);}catch(ArithmeticException e){e.printStackTrace();}finally{System.out.println("===");}System.out.prin...
第二个问题就是如果我们在try里面出现异常,然后在finally里面又出现异常,就会导致异常覆盖,会导致finally里面的异常将try的异常覆盖了。 代码语言:javascript 复制 publicclassCloseTest{publicvoidclose(){thrownewRuntimeException("close");}publicstaticvoidmain(String[]args){CloseTest closeTest=newCloseTest();try...
// 当打开超过1个资源, try-finally 可能用起来就比较难受了//try-finally is ugly when used with more than one resource!static voidcopy(String src,String dst)throws IOException{int BUFFER_SIZE=2048;InputStreamin=newFileInputStream(src);try{OutputStream out=newFileOutputStream(dst);try{byte[]buf...
java InputStreamResource为啥会在try的finally执行之后才会执行,本文主要从JDK11源码角度分析InputStream。JavaIO-源码:InputStreamInputStream类实现关系InputStream抽象类源码实现InputStreamFilterInputStreamByteArrayInputStreamBufferedInputStream参考文章InputStr
java try with resource可以使用finally java try catch finally用法,目录案例1finally无return案例2finally中有return案例3try中抛出异常被catch捕获,fianlly中无return案例四 try中抛出异常被catch捕获,fianlly中有return案例五 try中抛出异常被catch捕获,catc
Java 7 之前,资源使用完毕后,需要在finally块中手动对其进行关闭。 看一段代码: // src/test/java/TryWithResourcesTest#testJava6ReadFileWithFinallyBlock @Test publicvoidtestJava6ReadFileWithFinallyBlock()throwsIOException{ String filePath =this.getClass().getResource("test.txt").getPath(); ...
Java 7 之前,资源使用完毕后,需要在finally块中手动对其进行关闭。 看一段代码: // src/test/java/TryWithResourcesTest#testJava6ReadFileWithFinallyBlock @Test public void testJava6ReadFileWithFinallyBlock() throws IOException { String filePath = this.getClass().getResource("test.txt").getPath();...
在上述代码中,我们从FileInputStream中读取字节,并且写入到GZIPOutputStream中。GZIPOutputStream实际上是FileOutputStream的装饰器。由于try-with-resource的特性,实际编译之后的代码会在后面带上finally代码块,并且在里面调用fin.close()方法和out.close()方法。我们再来看GZIPOutputStream类的close方法: ...