Enhanced For Loop Manipulations

I want something like this:

there are two enhanced for loops:
for(Beat beat:b.getBeats()){
for(String name:b.getNames()){
// i want these loops to stop here and wait for user to write something in the textfield.
// perform a single iteration
// do some other task i.e getting the text from textfield and setting to to something
// repeat above process
}
}

How can I control this loop in such a way? The part I'm having trouble with is that how to bound loop to wait for user input and the perform next iteration