Question

Is there something like Python with context manager in Java?

For example say I want to do something like the following:

getItem(itemID){
   Connection c = C.getConnection();
   c.open();
   try{
    Item i = c.query(itemID);
   }catch(ALLBunchOfErrors){
      c.close();
   }

   c.close();
   return c;
}

where in python I just have:

with( C.getConnection().open() as c):
   Item i = c.query(itemID);
   return i;

Answer 1

Not at the moment; Java still hasn’t added syntactic sugar for this pattern. Still, it won’t get as clean as with(Python) or using(C#), but you can at least clean that up a little bit by just having one call to c.close() inside a finally block, instead of twice as you’ve done:

try {
    // use c
} finally {
    c.close()
}

This also brings it in line with how both with and using are actually implemented, which is a try..finally block (not a try..catch).