I am currently programming my first game in Java and I'm having trouble structuring it. My biggest concern is regarding the game loop. Currently I have implemented a class with only a main function which first initializes all of the variables and then goes into a game loop. Here is the structure of the code:

public static void main(String args[])

//Initializing all the variables

//Main game loop

while(true)
{
  if (mouse is pressed)
  {
    do something
  }

  if (mouse is released)
  {
    do something
  }
  ......
}

The problem is that the "do something" parts are quite lengthy and my code looks quite messy. I would like to turn them into methods, however I am not really sure how to do it.