JSeparator wont show with GridBagLayout

Question

I want to add a vertical JSeparator between two components using a GridBagLayout. The code I have is as follows:

public MainWindowBody(){
    setLayout(new G         


        

Answer 1

You could try to set the preferred width for the separator:

sep.setPreferredSize(new Dimension(5,1));

Then, make GridBagLayout use up all available height for the separator:

gbc.fill = GridBagConstraints.VERTICAL;
gbc.weighty = 1;