How can we create a common function for 2 or more java card applets?

I have 2 java card applets. They use one common function. But i don't know how to set up it. Anybody knows it, please help me. Please show me step by step to do it. Thank you.

When insert below line of code in the Test_Class_1.java and Test_Class_2, the Project will be failed:
byte aP1 = Test_common_function.GetP1((byte)0x02);
byte aP1 = Test_common_function.GetP1((byte)0x01);
Here is the source code:
Test_Class_2.java
package Test_Class_2;
import Test_common_function.Test_common_function;
import javacard.framework.APDU;
import javacard.framework.Applet;
public class Test_Class_2 extends Applet
   public static void install(byte[] bArray, short bOffset, byte bLength)
      // GP-compliant JavaCard applet registration
      new Test_Class_2().register(bArray, (short) (bOffset + 1),
            bArray[bOffset]);
   public void process(APDU apdu)
      byte aP1 = Test_common_function.GetP1((byte)0x02);
}Test_Class_1.java
package Test_Class_1;
import Test_common_function.Test_common_function;
import javacard.framework.APDU;
import javacard.framework.Applet;
public class Test_Class_1 extends Applet
   public static void install(byte[] bArray, short bOffset, byte bLength)
      // GP-compliant JavaCard applet registration
      new Test_Class_1().register(bArray, (short) (bOffset + 1),
            bArray[bOffset]);
   public void process(APDU apdu)
      byte aP1 = Test_common_function.GetP1((byte)0x02);
}Test_common_function.java
package Test_common_function;
import javacard.framework.APDU;
import javacard.framework.ISO7816;
import javacard.framework.Applet;
import javacard.framework.ISOException;
public class Test_common_function extends Applet
   public static void install(byte[] bArray, short bOffset, byte bLength)
      // GP-compliant JavaCard applet registration
      new Test_common_function().register(bArray,
            (short) (bOffset + 1), bArray[bOffset]);
   public void process(APDU apdu)
      // Good practice: Return 9000 on SELECT
      if (selectingApplet())
         return;
      byte[] buf = apdu.getBuffer();
      switch (buf[ISO7816.OFFSET_INS])
         case (byte) 0x00:
            break;
         default:
            // good practice: If you don't know the INStruction, say so:
            ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);
   public static byte bP1_Class1 = (byte)0x90;
   public static byte bP1_Class2 = (byte)0x90;
   public static byte GetP1(byte idclass)
      return idclass == (byte)0x01? bP1_Class1:bP1_Class2;
}and here is the trace log (in case of failure)
cm> /term "Remote|localhost:60351"
--Opening terminal
/card -a a000000003000000 -c com.ibm.jc.CardManagerresetCard with timeout: 0 (ms)
--Waiting for card...
ATR=3B F8 13 00 00 81 31 FE 45 4A 43 4F 50 76 32 34    ;.....1.EJCOPv24
    31 B7                                              1.
IOCTL().
ATR:
         T = 1
=> 00 A4 04 00 08 A0 00 00 00 03 00 00 00 00          ..............
(578768 nsec)
<= 6F 65 84 08 A0 00 00 00 03 00 00 00 A5 59 9F 65    oe...........Y.e
    01 FF 9F 6E 06 47 91 01 17 33 00 73 4A 06 07 2A    ...n.G...3.sJ..*
    86 48 86 FC 6B 01 60 0C 06 0A 2A 86 48 86 FC 6B    .H..k.`...*.H..k
    02 02 01 01 63 09 06 07 2A 86 48 86 FC 6B 03 64    ....c...*.H..k.d
    0B 06 09 2A 86 48 86 FC 6B 04 02 15 65 0B 06 09    ...*.H..k...e...
    2B 85 10 86 48 64 02 01 03 66 0C 06 0A 2B 06 01    +...Hd...f...+..
    04 01 2A 02 6E 01 02 90 00                         ..*.n....
Status: No Error
cm> set-key 255/1/DES-ECB/404142434445464748494a4b4c4d4e4f 255/2/DES-ECB/404142434445464748494a4b4c4d4e4f 255/3/DES-ECB/404142434445464748494a4b4c4d4e4f
cm> init-update 255
=> 80 50 00 00 08 37 0D D8 24 C9 C8 32 53 00          .P...7..$..2S.
(1829 usec)
<= 00 00 DE 81 34 18 39 B7 09 70 FF 02 00 00 3D 02    ....4.9..p....=.
    9C 31 C7 89 7A 8E 57 44 05 A7 67 C7 90 00          .1..z.WD..g...
Status: No Error
cm> ext-auth plain
=> 84 82 00 00 10 D8 BE 91 A3 94 E8 34 18 42 28 F6    ...........4.B(.
    74 EE 50 06 29                                     t.P.)
(1683 usec)
<= 90 00                                              ..
Status: No Error
cm> delete -r 01020304050102
=> 80 E4 00 80 09 4F 07 01 02 03 04 05 01 02 00       .....O.........
(833593 nsec)
<= 6A 88                                              j.
Status: Reference data not found
jcshell: Error code: 6a88 (Reference data not found)
jcshell: Wrong response APDU: 6A88
Ignoring expected error
cm> delete -r 01020304050103
=> 80 E4 00 80 09 4F 07 01 02 03 04 05 01 03 00       .....O.........
(769014 nsec)
<= 6A 88                                              j.
Status: Reference data not found
jcshell: Error code: 6a88 (Reference data not found)
jcshell: Wrong response APDU: 6A88
Ignoring expected error
cm> delete -r 010203040501
=> 80 E4 00 80 08 4F 06 01 02 03 04 05 01 00          .....O........
(734456 nsec)
<= 6A 88                                              j.
Status: Reference data not found
jcshell: Error code: 6a88 (Reference data not found)
jcshell: Wrong response APDU: 6A88
Ignoring expected error
cm> upload -c -d -b 250 "D:\WorkSpace\Test_Common_Funcation\bin\Test_common_function\javacard\Test_common_function.cap"
=> 80 E6 02 00 13 06 01 02 03 04 05 01 08 A0 00 00    ................
    00 03 00 00 00 00 00 00 00                         .........
(1864 usec)
<= 00 90 00                                           ...
Status: No Error
Start loading Header.cap (44 byte)
=> 80 E8 00 00 2C C4 82 03 E3 01 00 25 DE CA FF ED    ....,......%....
    02 02 04 00 01 06 01 02 03 04 05 01 14 54 65 73    .............Tes
    74 5F 63 6F 6D 6D 6F 6E 5F 66 75 6E 63 74 69 6F    t_common_functio
    6E 00                                              n.
(1607 usec)
<= 00 90 00                                           ...
Status: No Error
Header.cap loaded (44 byte)
Start loading Directory.cap (36 byte)
=> 80 E8 00 01 24 02 00 21 00 25 00 21 00 0C 00 0B    ....$..!.%.!....
    00 26 00 0E 00 4C 00 0C 00 0D 00 00 00 6F 02 5D    .&...L.......o.]
    00 02 00 00 00 00 01 01 00 00                      ..........
(1368 usec)
<= 00 90 00                                           ...
Status: No Error
Directory.cap loaded (36 byte)
Start loading Import.cap (14 byte)
=> 80 E8 00 02 0E 04 00 0B 01 03 01 07 A0 00 00 00    ................
    62 01 01 00                                        b...
(1096 usec)
<= 00 90 00                                           ...
Status: No Error
Import.cap loaded (14 byte)
Start loading Applet.cap (15 byte)
=> 80 E8 00 03 0F 03 00 0C 01 08 01 02 03 04 05 01    ................
    01 01 00 08 00                                     .....
(1188 usec)
<= 00 90 00                                           ...
Status: No Error
Applet.cap loaded (15 byte)
Start loading Class.cap (17 byte)
=> 80 E8 00 04 11 06 00 0E 00 00 00 80 03 00 FF 00    ................
    07 01 00 00 00 1C 00                               .......
(1457 usec)
<= 00 90 00                                           ...
Status: No Error
Class.cap loaded (17 byte)
Start loading Method.cap (79 byte)
=> 80 E8 00 05 4F 07 00 4C 00 01 10 18 8C 00 02 7A    ....O..L.......z
    05 30 8F 00 08 3D 8C 00 00 18 1D 04 41 18 1D 25    .0...=......A..%
    8B 00 01 7A 02 21 18 8B 00 06 60 03 7A 19 8B 00    ...z.!....`.z...
    04 2D 1A 04 25 73 00 09 00 00 00 00 00 0F 11 6D    .-..%s.........m
    00 8D 00 07 7A 02 10 1C 04 6B 07 7C 00 03 70 05    ....z....k.|..p.
    7C 00 05 78 00                                     |..x.
(1101 usec)
<= 00 90 00                                           ...
Status: No Error
Method.cap loaded (79 byte)
Start loading StaticField.cap (15 byte)
=> 80 E8 00 06 0F 08 00 0C 00 02 00 00 00 00 00 00    ................
    00 02 90 90 00                                     .....
(1069 usec)
<= 00 90 00                                           ...
Status: No Error
StaticField.cap loaded (15 byte)
Start loading ConstantPool.cap (41 byte)
=> 80 E8 00 07 29 05 00 26 00 09 06 00 00 01 03 80    ....)..&........
    03 02 06 80 03 00 05 00 00 00 03 80 0A 01 05 00    ................
    00 01 03 80 03 03 06 80 07 01 01 00 02 00 00       ...............
(3134 usec)
<= 00 90 00                                           ...
Status: No Error
ConstantPool.cap loaded (41 byte)
Start loading RefLocation.cap (16 byte)
=> 80 E8 00 08 10 09 00 0D 00 00 00 09 05 06 04 0A    ................
    07 07 13 0A 05 00                                  ......
(2067 usec)
<= 00 90 00                                           ...
Status: No Error
RefLocation.cap loaded (16 byte)
Start loading Descriptor.cap (114 byte)
=> 80 E8 00 09 72 0B 00 6F 01 00 01 00 02 00 00 02    ....r..o........
    00 04 00 09 00 00 00 80 03 01 09 00 00 01 80 03    ................
    00 81 00 01 00 14 00 05 00 00 00 00 01 09 00 08    ................
    00 16 00 12 00 00 00 00 07 01 00 1C 00 19 00 1F    ................
    00 00 00 00 02 09 00 3D 00 1D 00 0D 00 00 00 00    .......=........
    00 09 00 14 00 16 00 14 00 1F 00 21 00 1F 00 23    ...........!...#
    00 25 FF FF 01 10 04 B4 31 06 68 00 A1 02 33 01    .%......1.h...3.
    30 01 B0 01 20 02 41 00                            0... .A.
(1344 usec)
<= 00 90 00                                           ...
Status: No Error
Descriptor.cap loaded (114 byte)
Start loading Debug.cap (608 byte)
=> 80 E8 00 0A FA 0C 02 5D 00 1A 00 29 54 65 73 74    .......]...)Test
    5F 63 6F 6D 6D 6F 6E 5F 66 75 6E 63 74 69 6F 6E    _common_function
    2F 54 65 73 74 5F 63 6F 6D 6D 6F 6E 5F 66 75 6E    /Test_common_fun
    63 74 69 6F 6E 00 19 6A 61 76 61 63 61 72 64 2F    ction..javacard/
    66 72 61 6D 65 77 6F 72 6B 2F 41 70 70 6C 65 74    framework/Applet
    00 19 54 65 73 74 5F 63 6F 6D 6D 6F 6E 5F 66 75    ..Test_common_fu
    6E 63 74 69 6F 6E 2E 6A 61 76 61 00 0A 62 50 31    nction.java..bP1
    5F 43 6C 61 73 73 31 00 01 42 00 0A 62 50 31 5F    _Class1..B..bP1_
    43 6C 61 73 73 32 00 06 3C 69 6E 69 74 3E 00 03    Class2..<init>..
    28 29 56 00 04 74 68 69 73 00 2B 4C 54 65 73 74    ()V..this.+LTest
    5F 63 6F 6D 6D 6F 6E 5F 66 75 6E 63 74 69 6F 6E    _common_function
    2F 54 65 73 74 5F 63 6F 6D 6D 6F 6E 5F 66 75 6E    /Test_common_fun
    63 74 69 6F 6E 3B 00 07 69 6E 73 74 61 6C 6C 00    ction;..install.
    07 28 5B 42 53 42 29 56 00 06 62 41 72 72 61 79    .([BSB)V..bArray
    00 02 5B 42 00 07 62 4F 66 66 73 65 74 00 01 53    ..[B..bOffset..S
    00 07 62 4C 65 6E 67 74 68 00 07 70 72 6F 63 00    ..bLength..proc.
(937268 nsec)
<= 00 90 00                                           ...
Status: No Error
=> 80 E8 00 0B FA 65 73 73 00 1C 28 4C 6A 61 76 61    .....ess..(Ljava
    63 61 72 64 2F 66 72 61 6D 65 77 6F 72 6B 2F 41    card/framework/A
    50 44 55 3B 29 56 00 04 61 70 64 75 00 19 4C 6A    PDU;)V..apdu..Lj
    61 76 61 63 61 72 64 2F 66 72 61 6D 65 77 6F 72    avacard/framewor
    6B 2F 41 50 44 55 3B 00 03 62 75 66 00 05 47 65    k/APDU;..buf..Ge
    74 50 31 00 04 28 42 29 42 00 07 69 64 63 6C 61    tP1..(B)B..idcla
    73 73 00 14 54 65 73 74 5F 63 6F 6D 6D 6F 6E 5F    ss..Test_common_
    66 75 6E 63 74 69 6F 6E 00 19 00 01 00 00 00 01    function........
    00 02 00 01 00 02 00 00 02 00 04 00 03 00 04 00    ................
    09 00 00 00 00 00 05 00 04 00 09 00 00 00 01 00    ................
    06 00 07 00 01 00 01 02 00 05 00 01 00 01 00 00    ................
    08 00 09 00 00 00 05 00 00 00 04 00 0F 00 0A 00    ................
    0B 00 09 00 08 02 00 12 00 03 00 04 00 00 0C 00    ................
    0D 00 00 00 12 01 00 0E 00 0F 00 00 00 12 02 00    ................
    10 00 04 00 00 00 12 00 00 00 07 00 14 00 08 00    ................
    0D 00 15 00 0E 00 10 00 14 00 11 00 11 00 16 00    ................
(785421 nsec)
<= 00 90 00                                           ...
Status: No Error
=> 80 E8 80 0C 6C 00 11 00 12 00 01 00 1C 02 00 1F    ....l...........
    00 03 00 06 00 00 08 00 09 00 00 00 1F 01 00 13    ................
    00 14 00 00 00 1F 02 00 15 00 0D 00 0C 00 13 00    ................
    00 00 05 00 1B 00 06 00 06 00 1D 00 07 00 0B 00    ................
    20 00 0C 00 17 00 21 00 18 00 1D 00 27 00 1E 00     .....!.....'...
    1E 00 29 00 16 00 17 00 09 00 3D 02 00 0D 00 01    ..).......=.....
    00 01 00 00 18 00 04 00 00 00 0D 00 00 00 0C 00    ................
    2F 00                                              /.
(1986 usec)
<= 00 90 00                                           ...
Status: No Error
Debug.cap loaded (608 byte)
Load report:
999 bytes loaded in 0.0 seconds
effective code size on card:
      + package AID       6
      + applet AIDs       15
      + classes           17
      + methods           79
      + statics           2
      + exports           0
        overall           119 bytes
cm> install -i 0102030405010101 -q C9#() 010203040501 0102030405010101
=> 80 E6 0C 00 1F 06 01 02 03 04 05 01 08 01 02 03    ................
    04 05 01 01 01 08 01 02 03 04 05 01 01 01 01 00    ................
    02 C9 00 00 00                                     .....
(2346 usec)
<= 00 90 00                                           ...
Status: No Error
cm> upload -c -d -b 250 "D:\WorkSpace\Test_Common_Funcation\bin\Test_Class_2\javacard\Test_Class_2.cap"
jcshell: Cannot read <D:\WorkSpace\Test_Common_Funcation\bin\Test_Class_2\javacard\Test_Class_2.cap>: java.io.FileNotFoundException: D:\WorkSpace\Test_Common_Funcation\bin\Test_Class_2\javacard\Test_Class_2.cap (The system cannot find the path specified)
cm> install -i 0102030405010303 -q C9#() 01020304050103 0102030405010303
=> 80 E6 0C 00 20 07 01 02 03 04 05 01 03 08 01 02    .... ...........
    03 04 05 01 03 03 08 01 02 03 04 05 01 03 03 01    ................
    00 02 C9 00 00 00                                  ......
(1231 usec)
<= 6A 88                                              j.
Status: Reference data not found
jcshell: Error code: 6a88 (Reference data not found)
jcshell: Wrong response APDU: 6A88
Unexpected error; aborting executionThank very much!
Edited by: WhoKnows on Apr 20, 2012 9:32 PM

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