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In this article, the editor introduces in detail "what is the layout of Java Swing", the content is detailed, the steps are clear, and the details are handled properly. I hope that this article "what is the layout of Java Swing" can help you solve your doubts.

Border layout Manager

BorderLayout (Border layout Manager), the default layout manager for Window, JFrame, and JDialog. It mainly divides the window into five parts, namely, east (East), west (West), south (South), north (North) and middle (Center), corresponding to the right, left, bottom, top and center of the window.

Common construction methods of BorderLayout:

BorderLayout () creates a Border layout with no gaps

BorderLayout (int hgap, int vgap) creates a Border layout with gaps, where hgap represents horizontal gaps and vgap represents longitudinal gaps.

Specific example code:

Import javax.swing.*;import java.awt.*;public class Border {public static void main (String [] args) {JFrame jf = new JFrame (); jf.setBounds (100focus 100,800600); jf.setDefaultCloseOperation (WindowConstants.EXIT_ON_CLOSE); jf.setLayout (new BorderLayout ()); / / set to Border layout with no gaps JButton btn1 = new JButton (above) JButton btn2 = new JButton ("left"); JButton btn3 = new JButton ("middle"); JButton btn4 = new JButton ("right"); JButton btn5 = new JButton ("bottom"); jf.add (btn1, BorderLayout.NORTH); jf.add (btn2, BorderLayout.WEST); jf.add (btn3, BorderLayout.CENTER); jf.add (btn4, BorderLayout.EAST) Jf.add (btn5, BorderLayout.SOUTH); jf.setVisible (true);}}

According to the above running results, you can see that the corresponding content will be automatically filled in the corresponding location. So what happens if there is no content in the corresponding location? We can try to comment out one of them first.

It can be seen that the button named "up" has disappeared and has been replaced by the left, middle and right automatically filling in the missing parts. Try to comment out the other several separately, and the same result shows that the CENTER area automatically stretches to fill in the missing parts.

Streaming layout Manager

FlowLayout (streaming layout Manager) is the default layout manager for JPanel and JApplet. FlowLayout positions the components one by one in the order from top to bottom and from left to right. Unlike other layout managers, FlowLayout does not limit the size of all the components in it, but allows them to have their own size.

The common construction methods are as follows:

FlowLayout () defaults to creating a layout manager that is centered, 5 pixels horizontally and vertically.

FlowLayout (int align) creates a layout manager that is 5 pixels horizontally and vertically, customized as left-aligned, right-aligned, or centered.

FlowLayout (int align, int hgap, int vgap) custom alignment and layout manager for horizontal and vertical pixels.

Specific code:

Import javax.swing.*;import java.awt.*;public class Flow {public static void main (String [] args) {JFrame jf = new JFrame ("FLOWLAYOUT"); jf.setBounds (100100800600); jf.setDefaultCloseOperation (WindowConstants.EXIT_ON_CLOSE); JPanel jp = new JPanel (); JButton btn1 = new JButton ("1"); JButton btn2 = new JButton ("2"); JButton btn3 = new JButton ("3") JButton btn4 = new JButton ("4"); JButton btn5 = new JButton ("5"); JButton btn6 = new JButton ("6"); JButton btn7 = new JButton ("7"); JButton btn8 = new JButton ("8"); JButton btn9 = new JButton ("9"); jp.add (btn1); jp.add (btn2); jp.add (btn3) Jp.add (btn4); jp.add (btn5); jp.add (btn6); jp.add (btn7); jp.add (btn8); jp.add (btn9); / / add a streaming layout manager to the panel, setting the horizontal spacing to 180 pixels and the vertical spacing to 50 jp.setLayout (new FlowLayout (FlowLayout.LEADING, 180,50)) / / set background color jp.setBackground (Color.GRAY); jf.add (jp); jf.setVisible (true) }} after reading this, the article "what is the layout of Java Swing" has been introduced. If you want to master the knowledge of this article, you still need to practice and use it before you can understand it. If you want to know more about related articles, welcome to follow the industry information channel.

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