isEmpty | “扫黄”

src/main/idea/io/github/linwancen/plugin/show/java/JavaTree.java

@@ -29,7 +29,7 @@ public class JavaTree {
         if (docComment == null) {
             return null;
         }
-        String s = JavaLangDoc.INSTANCE.docElementToStr(settingsInfo, docComment);
+        @Nullable String s = JavaLangDoc.INSTANCE.docElementToStr(settingsInfo, docComment);
         if (s != null && !DocSkip.skipDoc(settingsInfo, s)) {
             return s;
         }

src/main/idea/io/github/linwancen/plugin/show/java/doc/OwnerToPsiDocUtils.java

@@ -47,7 +47,7 @@ public class OwnerToPsiDocUtils {
             return null;
         }
         @Nullable String name = psiPackage.getName();
-        if (name == null || name.length() == 0) {
+        if (name == null || name.isEmpty()) {
             return null;
         }
         @NotNull PsiDirectory[] psiDirectories = psiPackage.getDirectories();

src/main/idea/io/github/linwancen/plugin/show/java/doc/PsiClassUtils.java

@@ -27,6 +27,9 @@ public class PsiClassUtils {
             return PsiClass.EMPTY_ARRAY;
         }
         String className = matcher.group();
+        if (className == null) {
+            return PsiClass.EMPTY_ARRAY;
+        }
         @NotNull PsiClass[] psiClasses = nameToClass(className, project);
         if (psiClasses.length != 0) {
             return psiClasses;

src/main/idea/io/github/linwancen/plugin/show/java/doc/PsiMethodToPsiDoc.java

@@ -15,7 +15,7 @@ class PsiMethodToPsiDoc {
     @Nullable
     static PsiDocComment methodSupperNewPropDoc(@NotNull PsiMethod psiMethod) {
         // .class
-        PsiElement navElement = null;
+        @Nullable PsiElement navElement;
         try {
             navElement = psiMethod.getNavigationElement();
         } catch (Exception e) {