What is pack method in java programming?

If your talking about when you are packing components in a JFrame for example, something along the syntax of:

public static void main(String[] args) {
GUIFrame frame = new GUIFrame();
frame.setLocation(100, 100);
frame.setTitle("This is a JFrame implementation");


If you mean something like this, then the pack() method simply crams all the components together, to make the smallest space in a frame. They can be useful if all you want is that, otherwise options such as the .setSize(int height, int length); are also available for specific sizes.