Remap usages of Applet and friends

ij/IJ.java

@@ -123,7 +123,7 @@ else if (version.startsWith("1.7"))
 		df[9] = new DecimalFormat("0.000000000", dfs);
 		df[0].setRoundingMode(RoundingMode.HALF_UP);
 	}
-			
+
 	static void init(ImageJ imagej, Applet theApplet) {
 		ij = imagej;
 		applet = theApplet;
@@ -441,7 +441,11 @@ public static boolean isMacro() {
 		return macroRunning || Interpreter.getInstance()!=null;
 	}
 
-	/**Returns the Applet that created this ImageJ or null if running as an application.*/
+	/**
+	 * Returns the Applet that created this ImageJ or null if running as an application.
+	 * @deprecated Always returns null when running on Java 26+ due to removal of Applets.
+	 */
+	@Deprecated
 	public static java.applet.Applet getApplet() {
 		return applet;
 	}

ij/ImageJ.java

@@ -136,14 +136,19 @@ public ImageJ(int mode) {
 		this(null, mode);
 	}
 
-	/** Creates a new ImageJ frame that runs as an applet. */
+	/** Creates a new ImageJ frame that runs as an applet.
+	 @deprecated Applets were removed in Java 26*/
+	@Deprecated
 	public ImageJ(java.applet.Applet applet) {
 		this(applet, STANDALONE);
 	}
 
 	/** If 'applet' is not null, creates a new ImageJ frame that runs as an applet.
 		If  'mode' is ImageJ.EMBEDDED and 'applet is null, creates an embedded 
-		(non-standalone) version of ImageJ. */
+		(non-standalone) version of ImageJ.
+	    @deprecated Applets were removed in Java 26.
+	 */
+	@Deprecated
 	public ImageJ(java.applet.Applet applet, int mode) {
 		super("ImageJ");
 		if ((mode&DEBUG)!=0)

ij/Prefs.java

@@ -295,11 +295,24 @@ public static boolean get(String key, boolean defaultValue) {
 		else
 			return value.equals("true");
 	}
+
+	/**
+	 * Finds and loads the configuration file ("IJ_Props.txt")
+	 * and the preferences file ("IJ_Prefs.txt").
+	 *
+	 * @param ij
+	 * @return    an error message if "IJ_Props.txt" not found.
+	 */
+	public static String load(Object ij) {
+		return load(ij, null);
+	}
 
 	/** Finds and loads the configuration file ("IJ_Props.txt")
 	 * and the preferences file ("IJ_Prefs.txt").
 	 * @return	an error message if "IJ_Props.txt" not found.
+	 * @deprecated Prefer {@link #load(Object)} as Applets were removed in Java 26.
 	*/
+	@Deprecated
 	public static String load(Object ij, Applet applet) {
 		if (ImageJDir==null)
 			ImageJDir = System.getProperty("user.dir");
@@ -345,6 +358,7 @@ static void dumpPrefs() {
 	}
 	*/
 
+	@Deprecated
 	static String loadAppletProps(InputStream f, Applet applet) {
 		if (f==null)
 			return PROPS_NAME+" not found in ij.jar";