AddBatch problems (NoSuchMethodError)

Question

I have a JDBC applet that works fine using appetviewer, but when using a browser the folowing error gets written to the java console:
Exception occurred during event dispatching:
java.lang.NoSuchMethodError: java/sql/Statement: method addBatch(Ljava/lang/String;)V not found
i am using JDK1.3 and Oracle 8.1.6.
Below is my batch update code:
try {
con.setAutoCommit(false);
stmt = con.createStatement();
stmt.addBatch("INSERT INTO CUSTOMERS VALUES (CUSTOMERID_IDX.NEXTVAL,'" + TITLE + "','" + FORENAME + "','" + SURNAME + "','" + ADDRESS1 + "','" + ADDRESS2 + "','" + ADDRESS3 + "','" + ADDRESS4 + "','" + POSTCODE + "')");
stmt.addBatch("INSERT INTO ORDERS VALUES (ORDERID_IDX.NEXTVAL,SYSDATE,'" + TPRICE + "',CUSTOMERID_IDX.CURRVAL)");
stmt.addBatch("INSERT INTO PAYMENT VALUES (PAYMENTID_IDX.NEXTVAL,'" + PMETHOD + "','" + CNUMBER + "','" + INUMBER + "',ORDERID_IDX.CURRVAL)");
stmt.addBatch("INSERT INTO ORDER_LINE VALUES ('" + TP + "','" + LEVEL1 + "','" + QUAN1 + "','" + PRICE1 + "',ORDERID_IDX.CURRVAL)");
stmt.addBatch("INSERT INTO ORDER_LINE VALUES ('" + TP1 + "','" + LEVEL2 + "','" + QUAN2 + "','" + PRICE2 + "',ORDERID_IDX.CURRVAL)");
int [] updateCounts = stmt.executeBatch();
con.commit();
con.setAutoCommit(true);
stmt.close();
con.close();
} catch(BatchUpdateException b) {
System.out.println("SQLState: " + b.getMessage());
//return;
} catch(SQLException ex) {
System.out.println("SQLStateSQL: " + ex.getMessage());
thanxs in advance

Answer 1

I assume your browser is using JDK 1.1.
In general, if you want to compile JDBC code that runs under JDK 1.1 you need to use the 1.1 Java Compiler. Such code will also continue to run under JDK 1.2 or later (provided the all the classes and their methods conrinue to exists).
The converse does not hold. Specifically, if you use JDK 1.2 or later then your JDBC program may not run under JDK 1.1 (even though it would compile just fine under 1.1).
This happens whenever you use a method that is in the JDK 1.2 or later java.sql interfaces but not in in the JDK 1.1 java.sql interface. In JDK 1.1 such a method is bound to the Oracle implementation and is forward compatible. In JDK 1.2 such a method is bound to the java.sql interface and thus not backwards compatible.
To sum it up: you must use caution when using different Java versions. In general, you should compile with the lowest version (such as 1.1) if you want to run the same class files under several versions (such as 1.1 and 1.3).