My problem is I cannot make the inner catch throw an exception. Here I want ex to be thrown to the outer catch.
Runnable(){ public void run(){ try{ try{ }catch(Exception ex){ System.out.println("Inner"); throw ex; //I get an error here } }catch(Exception e){ System.out.println("Outer"); }} Error message: Unreported Exception must be caught, declared to be thrown
Put the block in a function .....
private void myFunction() throws Exception { try{ }catch(Exception ex){ System.out.println("Inner"); throw ex; //I get an error here } } Then call it from your code block
Runnable(){ public void run(){ try{ myFunction(); }catch(Exception e){ System.out.println("Outer"); }} This seems to function just fine. Making nested try-catch blocks is considered bad practice.
public class Test implements Runnable { public void run() { try { try { throw new IOException("bad"); //throw something here } catch (Exception ex) { System.out.println("Inner"); throw ex; } finally { } } catch (Exception e) { System.out.println("Outer"); } } public static void main(String[] args) { new Test().run(); } } // PRINTS: // Inner // Outer try this.
Callable(){ public void call(){ try{ try{ }catch(Exception ex){ System.out.println("Inner"); throw ex; //I get an error here } }catch(Exception e){ System.out.println("Outer"); }} 
Exceptionerror.