diff --git a/src/main/java/com/rarchives/ripme/ui/MainWindow.java b/src/main/java/com/rarchives/ripme/ui/MainWindow.java
index a6234333..6cd5c574 100644
--- a/src/main/java/com/rarchives/ripme/ui/MainWindow.java
+++ b/src/main/java/com/rarchives/ripme/ui/MainWindow.java
@@ -470,7 +470,7 @@ public final class MainWindow implements Runnable, RipStatusHandler {
         queuePanel.setBorder(emptyBorder);
         queuePanel.setVisible(false);
         queuePanel.setPreferredSize(new Dimension(300, 250));
-        queueListModel = new DefaultListModel();
+        queueListModel = new DefaultListModel<>();
         JList queueList = new JList(queueListModel);
         queueList.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
         QueueMenuMouseListener queueMenuMouseListener;
@@ -732,7 +732,7 @@ public final class MainWindow implements Runnable, RipStatusHandler {
             private void update() {
                 try {
                     String urlText = ripTextfield.getText().trim();
-                    if (urlText.equals("")) {
+                    if (urlText.isEmpty()) {
                         return;
                     }
                     if (!urlText.startsWith("http")) {
@@ -1499,12 +1499,13 @@ public final class MainWindow implements Runnable, RipStatusHandler {
              */
             if (Utils.getConfigBoolean("enable.finish.command", false)) {
                 try {
-                    String commandToRun = Utils.getConfigString("finish.command", "ls");
-                    commandToRun = commandToRun.replaceAll("%url%", url);
-                    commandToRun = commandToRun.replaceAll("%path%", f.toAbsolutePath().toString());
+                    String cmdStr = Utils.getConfigString("finish.command", "ls");
+                    cmdStr = cmdStr.replaceAll("%url%", url);
+                    cmdStr = cmdStr.replaceAll("%path%", f.toAbsolutePath().toString());
+                    // java dropped the exec string executor, as the string is only split very trivial.
+                    // do the same at the moment, and split, to get rid of java-21 deprecation warning.
+                    String[] commandToRun = cmdStr.split(" ");
                     LOGGER.info("RUnning command " + commandToRun);
-                    // code from:
-                    // https://stackoverflow.com/questions/5711084/java-runtime-getruntime-getting-output-from-executing-a-command-line-program
                     Process proc = Runtime.getRuntime().exec(commandToRun);
                     BufferedReader stdInput = new BufferedReader(new InputStreamReader(proc.getInputStream()));
 
diff --git a/src/main/java/com/rarchives/ripme/ui/UpdateUtils.java b/src/main/java/com/rarchives/ripme/ui/UpdateUtils.java
index 4d2c7cac..128eabba 100644
--- a/src/main/java/com/rarchives/ripme/ui/UpdateUtils.java
+++ b/src/main/java/com/rarchives/ripme/ui/UpdateUtils.java
@@ -222,13 +222,14 @@ public class UpdateUtils {
     public static String createSha256(Path file) {
         try {
             MessageDigest digest = MessageDigest.getInstance("SHA-256");
-            InputStream fis = Files.newInputStream(file);
-            int n = 0;
-            byte[] buffer = new byte[8192];
-            while (n != -1) {
-                n = fis.read(buffer);
-                if (n > 0) {
-                    digest.update(buffer, 0, n);
+            try (InputStream fis = Files.newInputStream(file)) {
+                int n = 0;
+                byte[] buffer = new byte[8192];
+                while (n != -1) {
+                    n = fis.read(buffer);
+                    if (n > 0) {
+                        digest.update(buffer, 0, n);
+                    }
                 }
             }
             byte[] hash = digest.digest();
@@ -313,7 +314,7 @@ public class UpdateUtils {
             if (shouldLaunch) {
                 // No need to do it during shutdown: the file used will indeed be the new one
                 logger.info("Executing: " + mainFile);
-                Runtime.getRuntime().exec("java -jar " + mainFile);
+                Runtime.getRuntime().exec(new String[]{"java", "-jar", mainFile.toString()});
             }
             logger.info("Update installed, newer version should be executed upon relaunch");
             System.exit(0);