Fix launch.json behavior and hanging issue with multiple main classes

Author: Achal1607

patches/8828.diff

@@ -0,0 +1,47 @@
+diff --git a/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/debugging/launch/NbLaunchDelegate.java b/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/debugging/launch/NbLaunchDelegate.java
+index a8ca4f2143de..e503da42bd4b 100644
+--- a/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/debugging/launch/NbLaunchDelegate.java
++++ b/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/debugging/launch/NbLaunchDelegate.java
+@@ -571,7 +571,7 @@ public void finished(boolean success) {
+             mainSource = false;
+         } else {
+             FileObject fileRoot = sourceCP != null ? sourceCP.findOwnerRoot(toRun) : null;
+-            mainSource = fileRoot != null && UnitTestForSourceQuery.findUnitTests(fileRoot).length > 0;
++            mainSource = fileRoot == null || UnitTestForSourceQuery.findSources(fileRoot).length == 0;
+         }
+         ActionProvider provider = null;
+         String command = null;
+diff --git a/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/debugging/launch/NbLaunchRequestHandler.java b/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/debugging/launch/NbLaunchRequestHandler.java
+index b1a472ce99a4..5e6242c6e89d 100644
+--- a/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/debugging/launch/NbLaunchRequestHandler.java
++++ b/java/java.lsp.server/src/org/netbeans/modules/java/lsp/server/debugging/launch/NbLaunchRequestHandler.java
+@@ -32,6 +32,8 @@
+ import java.util.concurrent.CompletableFuture;
+ import java.util.concurrent.atomic.AtomicReference;
+ import java.util.function.Consumer;
++import java.util.logging.Level;
++import java.util.logging.Logger;
+ import java.util.regex.Matcher;
+ import java.util.regex.Pattern;
+ import java.util.stream.Collectors;
+@@ -70,7 +72,7 @@
+  * @author martin
+  */
+ public final class NbLaunchRequestHandler {
+-
++    private static final Logger LOG = Logger.getLogger(NbLaunchRequestHandler.class.getName());
+     private NbLaunchDelegate activeLaunchHandler;
+ 
+     public CompletableFuture<Void> launch(Map<String, Object> launchArguments, DebugAdapterContext context) {
+@@ -148,7 +150,10 @@ public CompletableFuture<Void> launch(Map<String, Object> launchArguments, Debug
+                         case 1:
+                             handleSelectedMainClass.accept(mainClasses.get(0));
+                             break;
+-                        case 2:
++                        default:
++                            if(mainClasses.size() > 10){
++                                LOG.log(Level.WARNING, "The number of main classes is large :{0}", mainClasses.size());
++                            }
+                             List<NotifyDescriptor.QuickPick.Item> mainClassItems =
+                                     mainClasses.stream()
+                                                .map(eh -> new Item(eh.getQualifiedName(), eh.getQualifiedName()))