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src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/LinkFactoryImpl.java

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@@ -38,10 +38,11 @@
 import jdk.javadoc.internal.doclets.toolkit.BaseConfiguration;
 import jdk.javadoc.internal.doclets.toolkit.Content;
 import jdk.javadoc.internal.doclets.toolkit.Resources;
 import jdk.javadoc.internal.doclets.toolkit.util.DocPath;
 import jdk.javadoc.internal.doclets.toolkit.util.DocPaths;
+import jdk.javadoc.internal.doclets.toolkit.util.DocletConstants;
 import jdk.javadoc.internal.doclets.toolkit.util.links.LinkFactory;
 import jdk.javadoc.internal.doclets.toolkit.util.links.LinkInfo;
 
 /**
  * A factory that returns a link given the information about it.

@@ -131,11 +132,11 @@
 
     /**
      * {@inheritDoc}
      */
     @Override
-    protected Content getTypeParameterLinks(LinkInfo linkInfo, boolean isClassLabel){
+    protected Content getTypeParameterLinks(LinkInfo linkInfo, boolean isClassLabel) {
         Content links = newContent();
         List<TypeMirror> vars = new ArrayList<>();
         TypeMirror ctype = linkInfo.type != null
                 ? utils.getComponentType(linkInfo.type)
                 : null;

@@ -156,15 +157,20 @@
             return links;
         }
         if (((linkInfo.includeTypeInClassLinkLabel && isClassLabel)
                 || (linkInfo.includeTypeAsSepLink && !isClassLabel)) && !vars.isEmpty()) {
             links.add("<");
+            int lineStart = 0;
             boolean many = false;
             for (TypeMirror t : vars) {
                 if (many) {
                     links.add(",");
                     links.add(Contents.ZERO_WIDTH_SPACE);
+                    if (links.charCount() - lineStart > DocletConstants.PREFORMATTED_LINE_LENGTH) {
+                        lineStart = links.charCount();
+                        links.add(DocletConstants.NL + "        ");
+                    }
                 }
                 links.add(getTypeParameterLink(linkInfo, t));
                 many = true;
             }
             links.add(">");
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