How to modify the size of a swing layout?

To resize the swing layout, you can use the setLayout method to set the layout manager, and then use the setPreferredSize method to set the container size.

For example, if you want to resize a JPanel to 400×300 pixels, you can do so by following these steps:

JPanel panel = new JPanel();
panel.setLayout(new BorderLayout()); // 设置布局管理器为BorderLayout
panel.setPreferredSize(new Dimension(400, 300)); // 设置尺寸为400x300像素

In this example, we set the layout manager to BorderLayout and set the size of the container using the setPreferredSize method.

Alternatively, if you want to adjust the size of a component (such as a JButton), you can use the setPreferredSize method to set its dimensions.

For example, if you want to change the size of a JButton to 100×50 pixels, you can do so by following these steps:

JButton button = new JButton("Click");
button.setPreferredSize(new Dimension(100, 50)); // 设置尺寸为100x50像素

In this way, the size of the button will be changed to 100×50 pixels.