java Swing第6集：GridLayout

Posted 2021-05-07

import javax.swing.*;
import java.awt.*;

public class Main {

    public static void main(String[] args) {

        JFrame frame = new JFrame("Episode 6");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Container contentPane = frame.getContentPane();

        JPanel panel = new JPanel();
        GridLayout layout = new GridLayout(4, 5, 20, 20); //Creating a grid layout. last 2 params for gap sizes
        //For grid layouts, if there is a number greater than 1 set for rows(first param), then the grid will ALWAYS have that amount of rows. The columns, on the other hand, can change.
        //Now, if there is a 0 for rows, and a number for columns, there will always be that number of columns, and the rows will be added or unadded accordingly
        panel.setLayout(layout);

        for (int i = 0;i<10;i++){ //Generating buttons
            panel.add(new JButton("Button"));
        }

        contentPane.add(panel, BorderLayout.CENTER);
        frame.pack();
        frame.setVisible(true);
    }
}