Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridBagLayout;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;

public class Main {
    public static void main(String[] args) {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setLayout(new BorderLayout());
        f.add(new TestPane());
        f.pack();
        f.setVisible(true);
    }
}

class TestPane extends JPanel {
    public TestPane() {
        setLayout(new BorderLayout());
        JPanel top = new JPanel(new GridBagLayout());
        top.setOpaque(false);
        top.add(new JLabel("OK"));
        JScrollPane sp = new JScrollPane();
        sp.setOpaque(false);
        sp.getViewport().setOpaque(false);
        sp.setViewportView(top);
        add(sp);
    }

    @Override
    public Dimension getPreferredSize() {
        return new Dimension(200, 200);
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2d = (Graphics2D) g.create();
        g2d.setColor(Color.RED);
        g2d.drawLine(0, 0, getWidth(), getHeight());
        g2d.drawLine(getWidth(), 0, 0, getHeight());
        g2d.dispose();
    }
}