How to call a java method in a Stored procedure

Question

Hi.,
I was trying to call a method in a stored procedure
This was my procedure
CREATE OR REPLACE PROCEDURE proc_copy_file(sr_file VARCHAR2,dt_file VARCHAR2)
AS LANGUAGE JAVA
NAME 'FileCopy.copyfile(String,String)'; // calling a java method
/   this was my java method
CREATE OR REPLACE AND COMPILE JAVA SOURCE NAMED "FileCopy" as
import java.io.File;
  import java.io.IOException;
  import java.io.FileReader;
  import java.io.FileWriter;
  import javax.imageio.stream.FileImageInputStream;
  import javax.imageio.stream.FileImageOutputStream;
  import java.security.AccessControlException;
  public class FileCopy {
      // Define variable(s).
          private static int c;
          private static File file1,file2;
          private static FileReader inTextFile;
          private static FileWriter outTextFile;
          private static FileImageInputStream inImageFile;
          private static FileImageOutputStream outImageFile;
          // Define copyText() method.
          public static void copyfile(String fromFile,String toFile) throws AccessControlException
            // Create files from canonical file names.
            file1 = new File(fromFile);
            file2 = new File(toFile);
            // Copy file(s).
            try
              // Define and initialize FileReader(s).
              inTextFile  = new FileReader(file1);
              outTextFile = new FileWriter(file2);
              // Read character-by-character.
              while ((c = inTextFile.read()) != -1) {
                outTextFile.write(c); }
              // Close Stream(s).
              inTextFile.close();
              outTextFile.close(); }
            catch (IOException e) {
              System.out.println ("-------"); }
         // return 1;
      public static void main(String[] args){
                      switch(args.length){
                              case 0: System.out.println("File has not mentioned.");
                                              System.exit(0);
                              case 1: System.out.println("Destination file has not mentioned.");
                                              System.exit(0);
                              case 2: copyfile(args[0],args[1]);
                                              System.exit(0);
                              default : System.out.println("Multiple files are not allow.");
                                                System.exit(0);
};while i am executing this method i m getting error as
ORA-29531: NO METHOD COPYFILE IN CLASS FILECOPY
ORA-06512: AT "RMVER721.PROC_COPY_FILE", LINE 1could anyone help me

Answer 1

Looks like it is a matter of not quite the same namespace for String object.
I can get it to work by the java source containing:
          public static void copyfile(java.lang.String fromFile,java.lang.String toFile) throws AccessControlExceptionAnd the PL/SQL source:
NAME 'FileCopy.copyfile(java.lang.String,java.lang.String)'; // calling a java methodSeems like when you just use "String", then the namespace resolving in the java source is not the same as the namespace resolving in the PL/SQL?
Addendum:
You do not need to put java.lang.String in the java source, String will do (java.lang is by default "imported"?)
But in the PL/SQL source java.lang namespace prefix is needed - java.lang is not "imported" here.
Edited by: Kim Berg Hansen on Nov 23, 2011 1:07 PM