Update listings definition for Java which is the default language when using listings.

eisvogel.tex

@@ -711,6 +711,44 @@ $endif$
 }
 \lstset{style=eisvogel_listing_style}
 
+%
+% Java (Java SE 12, 2019-06-22)
+%
+\lstdefinelanguage{Java}{
+  morekeywords={
+    % normal keywords (without data types)
+    abstract,assert,break,case,catch,class,continue,default,
+    do,else,enum,exports,extends,final,finally,for,if,implements,
+    import,instanceof,interface,module,native,new,package,private,
+    protected,public,requires,return,static,strictfp,super,switch,
+    synchronized,this,throw,throws,transient,try,volatile,while,
+    % var is an identifier
+    var
+  },
+  morekeywords={[2] % data types
+    % primitive data types
+    boolean,byte,char,double,float,int,long,short,
+    % String
+    String,
+    % primitive wrapper types
+    Boolean,Byte,Character,Double,Float,Integer,Long,Short
+    % number types
+    Number,AtomicInteger,AtomicLong,BigDecimal,BigInteger,DoubleAccumulator,DoubleAdder,LongAccumulator,LongAdder,Short,
+    % other
+    Object,Void,void
+  },
+  morekeywords={[3] % literals
+    % reserved words for literal values
+    null,true,false,
+  },
+  sensitive,
+  morecomment  = [l]//,
+  morecomment  = [s]{/*}{*/},
+  morecomment  = [s]{/**}{*/},
+  morestring   = [b]",
+  morestring   = [b]',
+}
+
 \lstdefinelanguage{XML}{
   morestring      = [b]",
   moredelim       = [s][\bfseries\color{listing-keyword}]{<}{\ },