chore: upgrade to JDK21

Author: sebthom

plugin/.settings/org.eclipse.jdt.core.prefs

@@ -1,9 +1,9 @@
 eclipse.preferences.version=1
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
-org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=21
+org.eclipse.jdt.core.compiler.compliance=21
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=17
+org.eclipse.jdt.core.compiler.source=21

plugin/updater/.settings/org.eclipse.jdt.core.prefs

@@ -1,9 +1,9 @@
 eclipse.preferences.version=1
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
-org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=21
+org.eclipse.jdt.core.compiler.compliance=21
 org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=ignore
 org.eclipse.jdt.core.compiler.processAnnotations=disabled
 org.eclipse.jdt.core.compiler.release=disabled
-org.eclipse.jdt.core.compiler.source=17
+org.eclipse.jdt.core.compiler.source=21

plugin/updater/src/main/java/updater/AbstractSourceHandler.java

@@ -11,7 +11,7 @@
 import static updater.utils.Validation.isURL;
 
 import java.io.IOException;
-import java.net.URL;
+import java.net.URI;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.Map;
@@ -54,7 +54,7 @@ record DownloadContext(String targetNamePrefix, boolean updateExistingFiles, Pat
    void downloadExampleFile(final DownloadContext ctx, final String examplePathOrURL) throws IOException {
       if (examplePathOrURL != null) {
          if (isURL(examplePathOrURL)) {
-            final var sourceURL = new URL(examplePathOrURL);
+            final var sourceURL = URI.create(examplePathOrURL).toURL();
             final var targetFile = ctx.targetDir.resolve(ctx.targetNamePrefix + ".example." + getFileExtension(sourceURL.getPath()));
             if (ctx.updateExistingFiles || !Files.exists(targetFile)) {
                downloadFile(sourceURL, targetFile);
@@ -74,7 +74,7 @@ void downloadLangConfigurationJSONFile(final DownloadContext ctx, final String l
          if (isURL(langCfgPathOrURL)) {
             final var targetFile = ctx.targetDir.resolve(ctx.targetNamePrefix + ".language-configuration.json");
             if (ctx.updateExistingFiles || !Files.exists(targetFile)) {
-               downloadFile(new URL(langCfgPathOrURL), targetFile);
+               downloadFile(URI.create(langCfgPathOrURL).toURL(), targetFile);
             }
          } else {
             final var targetFile = ctx.targetDir.resolve(ctx.targetNamePrefix + ".language-configuration.json");
@@ -115,7 +115,7 @@ Path downloadTextMateGrammarFile(final DownloadContext ctx, final String grammar
       };
 
       if (isURL(grammarPathOrURL)) {
-         final var sourceURL = new URL(grammarPathOrURL);
+         final var sourceURL = URI.create(grammarPathOrURL).toURL();
          final var targetFile = ctx.targetDir.resolve(ctx.targetNamePrefix + mapFileExt.apply(getFileExtension(sourceURL.getPath())
             .toLowerCase()));
          if (ctx.updateExistingFiles || !Files.exists(targetFile)) {

pom.xml

@@ -68,7 +68,7 @@
 
 
    <properties>
-      <java.version>17</java.version>
+      <java.version>21</java.version>
       <tycho.version>5.0.0</tycho.version>
 
       <!-- to prevent dozen of warnings like: