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  1. import java.io.InterruptedIOException;
  2. import java.nio.file.FileSystemException;
  3.  
  4. class Test {
  5.     public void foo() throws InterruptedIOException {
  6.         try {
  7.         	// compiler knows the exact class of the exception, so we do not have
  8.         	// to define one in the `catch` block explicitly
  9.             throw new InterruptedIOException();
  10.         } catch (Exception ex) {
  11.             // do something with the exception (logging?)
  12.             throw ex;
  13.         }
  14.     }
  15.  
  16.     public void bar(int i) throws InterruptedIOException {
  17.         try {
  18.             if (i < 0) {
  19.                 throw new InterruptedIOException();
  20.             } else {
  21.                 throw new FileSystemException("test");
  22.             }
  23.         } catch (Exception ex) {
  24.         	// do something with the exception (logging?)
  25.             throw ex; // compile-time error
  26.         }
  27.     }
  28. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:25: error: unreported exception FileSystemException; must be caught or declared to be thrown
            throw ex; // compile-time error
            ^
1 error
stdout
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Standard output is empty
https://ideone.com/XJS2kZ
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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