This example inserts a row with a VARRAY of numbers as defined in e301 Creating a VARRAY Type in an Oracle Database. This example uses a prepared statement. 
    try {
        // Create an oracle.sql.ARRAY object to hold the values
        oracle.sql.ArrayDescriptor arrayDesc =
            oracle.sql.ArrayDescriptor.createDescriptor("number_varray", connection);
        int arrayValues[] = {123, 234};
        oracle.sql.ARRAY array = new oracle.sql.ARRAY(arrayDesc, connection, arrayValues);
    
        // Create a prepared statement for insertion into varray_table
        PreparedStatement ps =
            connection.prepareStatement("INSERT INTO varray_table VALUES(?)");
    
        // Set the values to insert
        ((oracle.jdbc.driver.OraclePreparedStatement)ps).setARRAY(1, array);
    
        // Insert the new row
        ps.execute();
    } catch (SQLException e) {
    }