MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.awt.BorderLayout;
import java.awt.GridLayout;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ScrollPaneConstants;

public class MainClass extends JPanel {

    public MainClass() {
        setLayout(new BorderLayout());

        JPanel jp = new JPanel();
        jp.setLayout(new GridLayout(20, 20));
        int b = 0;
        for (int i = 0; i < 20; i++) {
            for (int j = 0; j < 20; j++) {
                jp.add(new JButton("Button " + b));
                ++b;
            }
        }

        // Add panel to a scroll pane.
        int v = ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED;
        int h = ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED;
        JScrollPane jsp = new JScrollPane(jp, v, h);

        // Add scroll pane to the content pane.
        add(jsp, BorderLayout.CENTER);

    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.getContentPane().add(new MainClass());

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(200, 200);
        frame.setVisible(true);
    }
}