Welcome to another installment ofUnder The Hood. This column aims to give Java developers a glimpse of the mysterious mechanisms clicking and whirring beneath their running Java programs. This month's article continues the discussion of the bytecode instruction set of the Java virtual machine by ex...
try{File file=newFile("path");FileInputStream fis=newFileInputStream(file);String s="inside";}catch(FileNotFoundException e){e.printStackTrace();System.out.println(s);} 原因是因为,我们不知道在try语句块中的exception会在哪里被throw出去,比如这个例子,我们知道如果要抛出FileNotFoundException,也是在...
"Inside try block"消息被打印。 divide方法被调用,由于除数为零,抛出ArithmeticException。 异常被抛出,程序执行流程被中断。 由于异常被抛出,程序控制权转移到finally块。 "Inside finally block"消息被打印。
说明try中return不会被执行 //编译器把finally中的return语句标识为一个warning. 警告为'return' inside 'finally' block //Inspection info: Reports return statements inside of finally blocks. //While occasionally intended, such return statements may mask thrown exceptions and complicate debugging. // 翻译...
publicstaticvoidtryInside(){for(int count=1;count<=5;count++){try{if(count==3){//故意制造一下异常int num=1/0;}else{System.out.println("count:"+count+" 业务正常执行");}}catch(Exception e){System.out.println("try catch 在for 里面的情形, 出现了异常,for循环显然继续执行");}}} ...
Checked and Unchecked Exceptions in Java Learn the differences between Java's checked and unchecked exception with some examples Read more→ 2. Usingtry-with-resources Simply put, to be auto-closed, a resource has to be both declared and initialized inside thetry: ...
这是一个方法的主要内容,其唯一目的是返回浮点数数组。如果出现错误,我希望此方法返回 null ,因此我将循环放在 try...catch 块中,如下所示:
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Notice thetry...catchblock in thefinallyblock as well? This is because anIOExceptioncan also occur while closing theBufferedReaderinstance inside thisfinallyblock so it is also caught and handled. Thetry-with-resourcesstatement doesautomatic resource management. We need not explicitly close the resour...
publicstaticvoidtryInside(){ for(intcount=1;count<=5;count++){ try{ if(count==3){ //故意制造一下异常 intnum=1/0; }else{ System.out.println("count:"+count+"业务正常执行"); } }catch(Exceptione){ System.out.println("trycatch在for里面的情形,出现了异常,for循环显然继续执行"); } }...