Dealing with exceptions in my simple GUI app involving a process

[fawkes711]

Hey there,

Been using Java for a while now, but haven't learned everything so I started trying out Runtime and Processes and I am stuck in a dilema right now. Also not quite sure if this is the right forum.

Runtime rt = Runtime.getRuntime();
        try {
	Process p = rt.exec("notepad.exe " + file.getPath());
			
//	int exitVal = p.waitFor();
	p.waitFor();
          // System.out.println("ExitValue: " + exitVal);  
				
            // code for testing in a console
            BufferedReader outStream = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String output = null;
            while ((output = outStream.readLine()) != null){
            	System.out.println(output);}outStream.close();
            	
		} catch (IOException e) {
			e.printStackTrace();
		}

So the problem is the exceptions. In the current state, the program gives me:

Exception in thread "AWT-EventQueue-0" java.lang.Error: Unresolved compilation problem:
Unhandled exception type InterruptedException

at Convert.actionPerformed(Convert.java:112)
at javax.swing.AbstractButton.fireActionPerformed(Unk nown Source)...

I know the problem originates from the p.waitFor() line, I'm not even sure if I really need it. Every example code I have read for a simple process/runtime program has similar code, except some of them catch Exceptions in general, and some catch IOExceptions.

Anybody have any idea where I can start looking to understand the problem?

[fawkes711]

Well I changed the catch slightly and it appears to be working fine now.

} catch (Throwable e) {
			e.printStackTrace();
		}

[zweibieren]

Yeah, this query would probably get more answers in our sister forum on Threads and Synchronization.

Its documentation shows that waitFor() can throw InterruptedException.
It was probably not found until runtime because the compiler
cannot reliably determine whether it has been caught.

Googling "interruptedexception" did bring up potentially useful notes like Dealing with InterruptedExceptionl