RustyKnight

func print(
    _ items: Any...,
    separator: String = " ",
    terminator: String = "\n",
    file: StaticString = #file,
    function: StaticString = #function,
    line: UInt = #line, date: Date = Date()
) {
    let components = file.description.components(separatedBy: "/")
    if let name = components.last {

RustyKnight

    public final class ImageUtil {

        public static BufferedImage pixelate(BufferedImage imageToPixelate, int pixelSize) {
            BufferedImage pixelateImage = new BufferedImage(
                    imageToPixelate.getWidth(),
                    imageToPixelate.getHeight(),
                    imageToPixelate.getType());

            for (int y = 0; y < imageToPixelate.getHeight(); y += pixelSize) {
                for (int x = 0; x < imageToPixelate.getWidth(); x += pixelSize) {

RustyKnight

protected BufferedImage pixelate(BufferedImage source) {
    // How big should the pixelations be?
    final int PIX_SIZE = 16;

    BufferedImage img = new BufferedImage(source.getWidth(), source.getHeight(), BufferedImage.TYPE_INT_ARGB);
    Graphics2D g2d = img.createGraphics();
    g2d.drawImage(source, 0, 0, this);
    g2d.dispose();

    // Get the raster data (array of pixels)

RustyKnight

import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DocumentFilter;

public class RegularExpressionDocumentFilter extends ChainedDocumentFilter {
    
    // Useful for every kind of input validation !

RustyKnight

import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DocumentFilter;

// Original source https://tips4java.wordpress.com/2009/10/18/chaining-document-filters/
public class CaseModificationDocumentFilter extends ChainedDocumentFilter {

    public enum Case {
        UPPER, LOWER

RustyKnight

import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DocumentFilter;

public class LengthLimitDocumentFilter extends ChainedDocumentFilter {
    
    private int maxCharacters;

    public LengthLimitDocumentFilter(DocumentFilter filter, int maxChars) {

RustyKnight

import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DocumentFilter;

public class NumericDocumentFilter extends ChainedDocumentFilter {
    
    private int decimalPrecision = 2;
    private boolean allowNegative = false;

RustyKnight

import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DocumentFilter;

public class CharacterOnlyDocumentFilter extends ChainedDocumentFilter {
    
    public CharacterOnlyDocumentFilter(DocumentFilter filter) {
        super(filter);
    }

RustyKnight

import java.awt.Component;
import java.awt.KeyboardFocusManager;
import java.awt.Toolkit;
import javax.swing.LookAndFeel;
import javax.swing.UIManager;
import javax.swing.text.AbstractDocument;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;

RustyKnight

protected Point2D pointOnEllipse(double angle, Point2D center, double width, double height) {
    width = width / 2d;
    height = height / 2d;

    angle = Math.toRadians(angle);

    double t = Math.atan(width * Math.tan(angle) / height);
    return new Point2D.Double(center.getX() + width * Math.cos(t), center.getY() + height * Math.sin(t));
}