Refactor String API calls

Author: miasma

commonmark-ext-gfm-tables/src/main/java/org/commonmark/ext/gfm/tables/internal/TableBlockParser.java

@@ -274,7 +274,7 @@ public static class Factory extends AbstractBlockParserFactory {
         @Override
         public BlockStart tryStart(ParserState state, MatchedBlockParser matchedBlockParser) {
             List<SourceLine> paragraphLines = matchedBlockParser.getParagraphLines().getLines();
-            if (paragraphLines.size() >= 1 && Characters.find('|', paragraphLines.get(paragraphLines.size() - 1).getContent(), 0) != -1) {
+            if (!paragraphLines.isEmpty() && Characters.find('|', paragraphLines.get(paragraphLines.size() - 1).getContent(), 0) != -1) {
                 SourceLine line = state.getLine();
                 SourceLine separatorLine = line.substring(state.getIndex(), line.getContent().length());
                 List<TableCellInfo> columns = parseSeparator(separatorLine.getContent());

commonmark-ext-heading-anchor/src/main/java/org/commonmark/ext/heading/anchor/IdGenerator.java

@@ -66,7 +66,7 @@ public static Builder builder() {
     public String generateId(String text) {
         String normalizedIdentity = text != null ? normalizeText(text) : defaultIdentifier;
 
-        if (normalizedIdentity.length() == 0) {
+        if (normalizedIdentity.isEmpty()) {
             normalizedIdentity = defaultIdentifier;
         }
 

commonmark-ext-image-attributes/src/main/java/org/commonmark/ext/image/attributes/internal/ImageAttributesDelimiterProcessor.java

@@ -75,7 +75,7 @@ public int process(DelimiterRun openingRun, DelimiterRun closingRun) {
             node.unlink();
         }
 
-        if (attributesMap.size() > 0) {
+        if (!attributesMap.isEmpty()) {
             ImageAttributes imageAttributes = new ImageAttributes(attributesMap);
 
             // The new node is added as a child of the image node to which the attributes apply.

commonmark/src/main/java/org/commonmark/internal/util/Html5Entities.java

@@ -54,7 +54,7 @@ private static Map<String, String> readEntities() {
         try (BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(stream, charset))) {
             String line;
             while ((line = bufferedReader.readLine()) != null) {
-                if (line.length() == 0) {
+                if (line.isEmpty()) {
                     continue;
                 }
                 int equal = line.indexOf("=");