Swing Custom Border

Question

Is there any way to achieve custom javax.swing.border.Border as shown in image?

corner border around Swing component or widget

nIcE cOw · Accepted Answer · 2013-07-24T17:40:42.593

You simply need to extend AbstractBorder and override its paintBorder() method, here is one related example :

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.Line2D;
import java.awt.geom.Line2D.Double;
import javax.swing.*;
import javax.swing.border.AbstractBorder;

public class CustomMarginBorder
{
    private JPanel contentPane;
    private CustomBorder customBorder;

    private void displayGUI()
    {
        JFrame frame = new JFrame("Custom Arrow Border Example");
        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        customBorder = new CustomBorder(Color.BLUE, 15);
        contentPane = new JPanel();     
        contentPane.setBorder(customBorder);    

        frame.setContentPane(contentPane);
        frame.setSize(300, 300);
        frame.setLocationByPlatform(true);
        frame.setVisible(true);
    }

    public static void main(String[] args)
    {
        Runnable runnable = new Runnable()
        {
            @Override
            public void run()
            {
                new CustomMarginBorder().displayGUI();
            }
        };
        EventQueue.invokeLater(runnable);
    }
}

class CustomBorder extends AbstractBorder
{
    private Color borderColour;
    private int gap;

    public CustomBorder(Color colour, int g)
    {
        borderColour = colour;
        gap = g;
    }

    @Override
    public void paintBorder(Component c, Graphics g, int x, int y
                                                   , int width
                                                   , int height)
    {
        super.paintBorder(c, g, x, y, width, height);
        Graphics2D g2d = null;
        if (g instanceof Graphics2D)
        {
            g2d = (Graphics2D) g;
            g2d.setColor(borderColour);
            //Left Border
            g2d.draw(new Line2D.Double((double)x + 10, (double)y + 10
                                , (double)x + 10, (double)y + 20));
            g2d.draw(new Line2D.Double( (double)x + 10, (double)y + 10
                                , (double)x + 20, (double)y + 10));
            // Right Border
            g2d.draw(new Line2D.Double( (double)width - 10, (double)y + 10
                                , (double)width - 10, (double)y + 20));
            g2d.draw(new Line2D.Double( (double)width - 10, (double)y + 10
                                , (double)width - 20, (double)y + 10));
            // Lower Left Border
            g2d.draw(new Line2D.Double( (double)x + 10, (double)height - 10
                                , (double)x + 20, (double)height - 10));
            g2d.draw(new Line2D.Double( (double)x + 10, (double)height - 10
                                , (double)x + 10, (double)height - 20));
            // Lower Right Border
            g2d.draw(new Line2D.Double( (double)width - 10, (double)height - 10
                                , (double)width - 20, (double)height - 10));
            g2d.draw(new Line2D.Double( (double)width - 10, (double)height - 10
                                , (double)width - 10, (double)height - 20));
        }
    }

    @Override
    public Insets getBorderInsets(Component c)
    {
        return (getBorderInsets(c, new Insets(gap, gap, gap, gap)));
    }

    @Override
    public Insets getBorderInsets(Component c, Insets insets)
    {
        insets.left = insets.top = insets.right = insets.bottom = gap;
        return insets;
    }

    @Override
    public boolean isBorderOpaque()
    {
        return true;
    }
}

For Thick line Border use this :

class CustomBorder extends AbstractBorder
{
    private Color borderColour;
    private int gap;
    private double rectWidth;
    private double rectHeight;

    public CustomBorder(Color colour, int g, double w, double h)
    {
        borderColour = colour;
        gap = g;
        rectWidth = w;
        rectHeight = h;
    }

    @Override
    public void paintBorder(Component c, Graphics g, int x, int y
                                                   , int width
                                                   , int height)
    {
        super.paintBorder(c, g, x, y, width, height);
        Graphics2D g2d = null;
        if (g instanceof Graphics2D)
        {
            g2d = (Graphics2D) g;
            g2d.setColor(borderColour);
            //Left Border
            g2d.fill(new Rectangle2D.Double(
                                  (double)x + gap
                                , (double)y + gap
                                , rectWidth, rectHeight));
            g2d.fill(new Rectangle2D.Double(
                                  (double)x + gap
                                , (double)y + gap + rectHeight
                                , rectHeight, rectWidth));
            // Right Border
            g2d.fill(new Rectangle2D.Double(
                                  (double)width - gap - rectWidth
                                , (double)y + gap
                                , rectWidth, rectHeight));
            g2d.fill(new Rectangle2D.Double(
                                  (double)width - gap - rectHeight
                                , (double)y + gap + rectHeight
                                , rectHeight, rectWidth));
            // Lower Left Border
            g2d.fill(new Rectangle2D.Double(
                                  (double)x + gap
                                , (double)height - gap - rectWidth
                                , rectHeight, rectWidth));
            g2d.fill(new Rectangle2D.Double(
                                  (double)x + gap
                                , (double)height - gap
                                , rectWidth, rectHeight));
            // Lower Right Border
            g2d.fill(new Rectangle2D.Double(
                                  (double)width - gap - rectHeight
                                , (double)height - gap - rectWidth
                                , rectHeight, rectWidth));
            g2d.fill(new Rectangle2D.Double(
                                  (double)width - gap - rectWidth
                                , (double)height - gap
                                , rectWidth, rectHeight));
        }
    }

    @Override
    public Insets getBorderInsets(Component c)
    {
        return (getBorderInsets(c, new Insets(gap, gap, gap, gap)));
    }

    @Override
    public Insets getBorderInsets(Component c, Insets insets)
    {
        insets.left = insets.top = insets.right = insets.bottom = gap;
        return insets;
    }

    @Override
    public boolean isBorderOpaque()
    {
        return true;
    }
}

OUTPUT :

Border with thin and thick line

THINBORDER THICKBORDER

For

..nice. :) See also [How do I create screenshots?](http://meta.stackexchange.com/questions/99734/how-do-i-create-a-screenshot-to-illustrate-a-post) (for tips on making *great* screenshots). — Andrew Thompson, Jul 24 '13 at 13:59
@AndrewThompson : My mouse is acting weird, seems like its time to replace one, since it seldom use to work when its being dragged. I added the link to my favourites, since you pointed me once before, regarding the same thingy :-). For the rest you're MOST WELCOME and KEEP SMILING :-) — nIcE cOw, Jul 24 '13 at 14:18
I was mainly thinking of how Alt+PrintScreen will 'auto-trim' the active window, not sure where that is buried in the long (long) thread now. ;) — Andrew Thompson, Jul 24 '13 at 14:22
Thanks for reply , `g2d.setStroke(new BasicStroke(5));` in Thin line Border Code can change to Thick line without changing all code. — user225928, Jul 25 '13 at 11:55

score 4 · Answer 2 · edited May 23 '17 at 11:52

4

Yes. See this answer for an example.

edited May 23 '17 at 11:52

Community

1
1

answered Jul 24 '13 at 13:16

Andrew Thompson

168,117
40
217
433

Swing Custom Border

2 Answers2

OUTPUT :

Border with thin and thick line

Linked