ADDITIONAL SYSTEM INFORMATION :
An exception has occurred in the compiler (1.8.0_231) on Oracle database server standard 12.2.0.1.0 x64 on Windows 2016 standard x64

A DESCRIPTION OF THE PROBLEM :
An exception has occurred in the compiler (1.8.0_231) when compiling Oracle java component:

CREATE OR REPLACE AND RESOLVE JAVA SOURCE NAMED XXX.TA_C_DIRLIST_JAVA
RESOLVER (( ))
as import java.io.*;
import java.sql.*;

    public class TA_C_DIRLIST
    {

      static private String dateStr( java.util.Date x )
       {
           if ( x != null )
               return (x.getYear()+1900) + "/" + (x.getMonth()+1) + "/" + x.getDate() +
" " +
                       x.getHours() + ":" + x.getMinutes() + ":" + x.getSeconds();
          else return null;
       }

    public static void getList(String directory)
                      throws SQLException
   {
       File path = new File( directory );
       String[] list = path.list();
       String element;

       for(int i = 0; i < list.length; i++)
       {
           element = list[i];

           String fpath=directory+"/"+list[i];

           File f = new File(fpath);

           long len;

           String ftype;
           String sqldate;
           Timestamp DateTime;


           if (f.isFile()) {

             len = f.length();
             DateTime = new Timestamp(f.lastModified());
             ftype = "F";

           } else {

             len = 0;
             DateTime = null;
             ftype = "D";
           }

           #sql { INSERT INTO TA_C_DIR_LIST (C_FILENAME, C_file_size, C_file_type, C_modified)
                  VALUES (:element, :len, :ftype, :DateTime) };
       }
   }

   }
/


REGRESSION : Last worked in version 8

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Try to compile the referenced component in the description

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The component compiles without error
ACTUAL -
0 0 java.lang.IllegalArgumentException
0 0 An exception has occurred in the compiler (1.8.0_231). Please file a bug against the Java compiler via the Java bug reporting page (http://bugreport.java.com) after checking the Bug Database (http://bugs.java.com) for duplicates. Include your program and the following diagnostic in your report. Thank you.
0 0 at oracle.aurora.rdbms.Compiler.doCompile(Compiler.java)
0 0 at oracle.aurora.rdbms.Compiler.compile(Compiler.java)
0 0 at oracle.aurora.rdbms.Compiler.access$000(Compiler.java)
0 0 at oracle.aurora.rdbms.Compiler$1.run(Compiler.java)
0 0 at oracle.aurora.jdkcompiler.JdkDriver.compile(JdkDriver.java)
0 0 at java.security.AccessController.doPrivileged(Native Method)
0 0 at com.sun.tools.javac.util.JCDiagnostic.<init>(JCDiagnostic.java)
0 0 at com.sun.tools.javac.util.JCDiagnostic$Factory.error(JCDiagnostic.java)
0 0 at com.sun.tools.javac.util.JCDiagnostic$Factory.create(JCDiagnostic.java)
0 0 at com.sun.tools.javac.util.AbstractLog.error(AbstractLog.java)
0 0 at com.sun.tools.javac.parser.Scanner.nextToken(Scanner.java)
0 0 at com.sun.tools.javac.parser.JavacParser.typeDeclaration(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.parseStatementAsBlock(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.parseStatementAsBlock(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.parseStatement(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.parseStatement(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.parseStatement(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.parseStatement(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.parseCompilationUnit(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.nextToken(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.methodDeclaratorRest(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.classOrInterfaceOrEnumDeclaration(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.classOrInterfaceBodyDeclaration(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.classOrInterfaceBody(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.classDeclaration(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.blockStatements(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.blockStatements(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.blockStatement(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.blockStatement(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.blockStatement(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.blockStatement(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.block(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.block(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.block(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.block(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.block(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.block(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavacParser.accept(JavacParser.java)
0 0 at com.sun.tools.javac.parser.JavaTokenizer.readToken(JavaTokenizer.java)
0 0 at com.sun.tools.javac.parser.JavaTokenizer.lexError(JavaTokenizer.java)
0 0 at com.sun.tools.javac.main.JavaCompiler.parseFiles(JavaCompiler.java)
0 0 at com.sun.tools.javac.main.JavaCompiler.parse(JavaCompiler.java)
0 0 at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java)
0 0 at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java)


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See description
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CUSTOMER SUBMITTED WORKAROUND :
No workaround

FREQUENCY : always