Java流布局-特定元素的边距/填充?

I am very new to Swing, and I'm trying to make a GUI. Using Netbeans' GUI creator thing, I managed to make something I liked. But it makes me feel bad that I used the editor for this, so now I am trying to make the same design using code. Here is a picture of what I am trying to make: Right now I am just focusing on creating the "Criteria" section (yes I know I spelled it wrong in the picture) Here is what I currently have so far: I've highlighted in red where I want to increase the margin:I am very new to Swing, and I'm trying to make