Need to implement the timer class for 1.1

Hi
I am using JDK1.1 for integration with a STB.
The timer class is not existing for 1.1.
Where I can find an implementation code of the timer class in order
to perform a schedule task which work with JDK 1.1
Thanks
Fred

Before you look for Sun's implementation of Timer in post-1.1 versions, make sure you read the licence agreement for those versions and the copyright notice on the code. There's a good chance that by using that code you will be violating one or both of those. This may be a serious issue.
Your other alternative is to read the API documentation for Timer (and TimerTask) and to write your own implementation. That shouldn't be too difficult.
I doubt that you will find people actively writing open-source extensions for Java 1.1 since Java 2 has been out for nine years now. Most likely you are on your own there.

Similar Messages

Why does the child class need to implement the parent classes constructor?/

As I was playing around with some code I came across this point :
First Class
public class A {
     public int x;
     A(int i){
          x=i;
          System.out.println("A is initialised");
}Second Class extending it :
public class B extends A{
     private int y;
   // Why do I need this constructor to call parents constructor?
// My guess is so that when i make an object of class B referring to class A it should make sense?
     B(int i) {
          super(i);
          y=test;
public static void main(String args[]){
      A a = new A(1);
      A b = new B(1); make an object of class B referring to class A it should work!!
      B c = new B(2);
      B d =(B) new A(2); --> gives class cast exception!
}I am little confused here, Can someone throw more light on it.
Thanks

You don't override constructors. However, every class, in it's constructor, must call some constructor from the class it's extending. In most cases this is simply super(). However, if your class does not have a default constructor (i.e. you've declared any other constructor, or the sub class does not have access to it, I.E. you've declared it private) then you must include a call to some other constructor in the super class. The constructor in the subclass does not have to be the same as the super class one, but you do have to invoke a constructor from the super class. I.E.
class A {
A(int i) {}
class B extends A {
B(String b) {
    super(0);
}

Need to create a driver class for a program i have made...

hey guys im new to these forums and someone told me that i could get help on here if i get in a bind...my problem is that i need help creating a driver class for a program that i have created and i dont know what to do. i need to know how to do this is because my professor told us after i was 2/3 done my project that we need at least 2 class files for our project, so i need at least 2 class files for it to run... my program is as follows:
p.s might be kinda messy, might need to put it into a text editor
Cipher.java
This program encodes and decodes text strings using a cipher that
can be specified by the user.
import java.io.*;
public class Cipher
public static void printID()
// output program ID
System.out.println ("*********************");
System.out.println ("* Cipher *");
System.out.println ("* *");
System.out.println ("* *");
System.out.println ("* *");
System.out.println ("* CS 181-03 *");
System.out.println ("*********************");
public static void printMenu()
// output menu
System.out.println("\n\n****************************" +
"\n* 1. Set cipher code. *" +
"\n* 2. Encode text. *" +
"\n* 3. Decode coded text. *" +
"\n* 4. Exit the program *" +
"\n****************************");
public static String getText(BufferedReader input, String prompt)
throws IOException
// prompt the user and get their response
System.out.print(prompt);
return input.readLine();
public static int getInteger(BufferedReader input, String prompt)
throws IOException
// prompt and get response from user
String text = getText(input, prompt);
// convert it to an integer
return (new Integer(text).intValue());
public static String encode(String original, int offset)
// declare constants
final int ALPHABET_SIZE = 26; // used to wrap around A-Z
String encoded = ""; // base for string to return
char letter; // letter being processed
// convert message to upper case
original = original.toUpperCase();
// process each character of the message
for (int index = 0; index < original.length(); index++)
// get the letter and determine whether or not to
// add the cipher value
letter = original.charAt(index);
if (letter >='A' && letter <= 'Z')
// is A-Z, so add offset
// determine whether result will be out of A-Z range
if ((letter + offset) > 'Z') // need to wrap around to 'A'
letter = (char)(letter - ALPHABET_SIZE + offset);
else
if ((letter + offset) < 'A') // need to wrap around to 'Z'
letter = (char)(letter + ALPHABET_SIZE + offset);
else
letter = (char) (letter + offset);
// build encoded message string
encoded = encoded + letter;
return encoded;
public static String decode(String original, int offset)
// declare constants
final int ALPHABET_SIZE = 26; // used to wrap around A-Z
String decoded = ""; // base for string to return
char letter; // letter being processed
// make original message upper case
original = original.toUpperCase();
// process each letter of message
for (int index = 0; index < original.length(); index++)
// get letter and determine whether to subtract cipher value
letter = original.charAt(index);
if (letter >= 'A' && letter <= 'Z')
// is A-Z, so subtract cipher value
// determine whether result will be out of A-Z range
if ((letter - offset) < 'A') // wrap around to 'Z'
letter = (char)(letter + ALPHABET_SIZE - offset);
else
if ((letter - offset) > 'Z') // wrap around to 'A'
letter = (char)(letter - ALPHABET_SIZE - offset);
else
letter = (char) (letter - offset);
// build decoded message
decoded = decoded + letter;
return decoded;
// main controls flow throughout the program, presenting a
// menu of options the user.
public static void main (String[] args) throws IOException
// declare constants
final String PROMPT_CHOICE = "Enter your choice: ";
final String PROMPT_VALID = "\nYou must enter a number between 1" +
" and 4 to indicate your selection.\n";
final String PROMPT_CIPHER = "\nEnter the offset value for a caesar " +
"cipher: ";
final String PROMPT_ENCODE = "\nEnter the text to encode: ";
final String PROMPT_DECODE = "\nEnter the text to decode: ";
final String SET_STR = "1"; // selection of 1 at main menu
final String ENCODE_STR = "2"; // selection of 2 at main menu
final String DECODE_STR = "3"; // selection of 3 at main menu
final String EXIT_STR = "4"; // selection of 4 at main menu
final int SET = 1; // menu choice 1
final int ENCODE = 2; // menu choice 2
final int DECODE =3; // menu choice 4
final int EXIT = 4; // menu choice 3
final int ALPHABET_SIZE = 26; // number of elements in alphabet
// declare variables
boolean finished = false; // whether or not to exit program
String text; // input string read from keyboard
int choice; // menu choice selected
int offset = 0; // caesar cipher offset
// declare and instantiate input objects
InputStreamReader reader = new InputStreamReader(System.in);
BufferedReader input = new BufferedReader(reader);
// Display program identification
printID();
// until the user selects the exit option, display the menu
// and respond to the choice
do
// Display menu of options
printMenu();
// Prompt user for an option and read input
text = getText(input, PROMPT_CHOICE);
// While selection is not valid, prompt for correct info
while (!text.equals(SET_STR) && !text.equals(ENCODE_STR) &&
!text.equals(EXIT_STR) && !text.equals(DECODE_STR))
text = getText(input, PROMPT_VALID + PROMPT_CHOICE);
// convert choice to an integer
choice = new Integer(text).intValue();
// respond to the choice selected
switch(choice)
case SET:
     // get the cipher value from the user and constrain to
// -25..0..25
offset = getInteger(input, PROMPT_CIPHER);
offset %= ALPHABET_SIZE;
break;
case ENCODE:
// get message to encode from user, and encode it using
// the current cipher value
text = getText(input, PROMPT_ENCODE);
text = encode(text, offset);
System.out.println("Encoded text is: " + text);
break;
case DECODE:
// get message to decode from user, and decode it using
// the current cipher value
text = getText(input, PROMPT_DECODE);
text = decode(text, offset);
System.out.println("Decoded text is: " + text);
break;
case EXIT:
// set exit flag to true
finished = true ;
break;
} // end of switch on choice
} while (!finished); // end of outer do loop
// Thank user
System.out.println("Thank you for using Cipher for all your" +
" code breaking and code making needs.");
}

My source in code format...sorry guys :)
   Cipher.java
   This program encodes and decodes text strings using a cipher that
   can be specified by the user.
import java.io.*;
public class Cipher
   public static void printID()
      // output program ID
      System.out.println ("*********************");
      System.out.println ("*       Cipher      *");
      System.out.println ("*                   *");
      System.out.println ("*                          *");
      System.out.println ("*                   *");
      System.out.println ("*     CS 181-03     *");
      System.out.println ("*********************");
   public static void printMenu()
      // output menu
      System.out.println("\n\n****************************" +
                           "\n*   1. Set cipher code.    *" +
                           "\n*   2. Encode text.        *" +
                           "\n*   3. Decode coded text. *" +
                           "\n*   4. Exit the program    *" +
                           "\n****************************");
   public static String getText(BufferedReader input, String prompt)
                                       throws IOException
      // prompt the user and get their response
      System.out.print(prompt);
      return input.readLine();
   public static int getInteger(BufferedReader input, String prompt)
                                       throws IOException
      // prompt and get response from user
      String text = getText(input, prompt);
      // convert it to an integer
      return (new Integer(text).intValue());
   public static String encode(String original, int offset)
      // declare constants
      final int ALPHABET_SIZE = 26; // used to wrap around A-Z
      String encoded = "";           // base for string to return
      char letter;                   // letter being processed
      // convert message to upper case
      original = original.toUpperCase();
      // process each character of the message
      for (int index = 0; index < original.length(); index++)
         // get the letter and determine whether or not to
         // add the cipher value
         letter = original.charAt(index);
         if (letter >='A' && letter <= 'Z')
            // is A-Z, so add offset
            // determine whether result will be out of A-Z range
            if ((letter + offset) > 'Z') // need to wrap around to 'A'
               letter = (char)(letter - ALPHABET_SIZE + offset);
            else
               if ((letter + offset) < 'A') // need to wrap around to 'Z'
                  letter = (char)(letter + ALPHABET_SIZE + offset);
               else
                  letter = (char) (letter + offset);
         // build encoded message string
         encoded = encoded + letter;
      return encoded;
   public static String decode(String original, int offset)
      // declare constants
      final int ALPHABET_SIZE = 26; // used to wrap around A-Z
      String decoded = "";           // base for string to return
      char letter;                   // letter being processed
      // make original message upper case
      original = original.toUpperCase();
      // process each letter of message
      for (int index = 0; index < original.length(); index++)
         // get letter and determine whether to subtract cipher value
         letter = original.charAt(index);
         if (letter >= 'A' && letter <= 'Z')
            // is A-Z, so subtract cipher value
            // determine whether result will be out of A-Z range
            if ((letter - offset) < 'A') // wrap around to 'Z'
               letter = (char)(letter + ALPHABET_SIZE - offset);
            else
               if ((letter - offset) > 'Z') // wrap around to 'A'
                  letter = (char)(letter - ALPHABET_SIZE - offset);
               else
                  letter = (char) (letter - offset);
         // build decoded message
         decoded = decoded + letter;
      return decoded;
   // main controls flow throughout the program, presenting a
   // menu of options the user.
   public static void main (String[] args) throws IOException
     // declare constants
      final String PROMPT_CHOICE = "Enter your choice: ";
      final String PROMPT_VALID = "\nYou must enter a number between 1" +
                                  " and 4 to indicate your selection.\n";
      final String PROMPT_CIPHER = "\nEnter the offset value for a caesar " +
                                   "cipher: ";
      final String PROMPT_ENCODE = "\nEnter the text to encode: ";
      final String PROMPT_DECODE = "\nEnter the text to decode: ";
      final String SET_STR = "1"; // selection of 1 at main menu
      final String ENCODE_STR = "2"; // selection of 2 at main menu
      final String DECODE_STR = "3"; // selection of 3 at main menu
      final String EXIT_STR = "4"; // selection of 4 at main menu
      final int SET = 1;            // menu choice 1
      final int ENCODE = 2;         // menu choice 2
      final int DECODE =3;          // menu choice 4
      final int EXIT = 4;           // menu choice 3
      final int ALPHABET_SIZE = 26; // number of elements in alphabet
      // declare variables
      boolean finished = false; // whether or not to exit program
      String text;              // input string read from keyboard
      int choice;               // menu choice selected
      int offset = 0;           // caesar cipher offset
      // declare and instantiate input objects
      InputStreamReader reader = new InputStreamReader(System.in);
      BufferedReader input = new BufferedReader(reader);
      // Display program identification
      printID();
      // until the user selects the exit option, display the menu
      // and respond to the choice
      do
         // Display menu of options
         printMenu();
         // Prompt user for an option and read input
         text = getText(input, PROMPT_CHOICE);
         // While selection is not valid, prompt for correct info
         while (!text.equals(SET_STR) && !text.equals(ENCODE_STR) &&
                 !text.equals(EXIT_STR) && !text.equals(DECODE_STR))
            text = getText(input, PROMPT_VALID + PROMPT_CHOICE);
         // convert choice to an integer
         choice = new Integer(text).intValue();
         // respond to the choice selected
         switch(choice)
            case SET:
            // get the cipher value from the user and constrain to
               // -25..0..25
               offset = getInteger(input, PROMPT_CIPHER);
               offset %= ALPHABET_SIZE;
               break;
            case ENCODE:
               // get message to encode from user, and encode it using
               // the current cipher value
               text = getText(input, PROMPT_ENCODE);
               text = encode(text, offset);
               System.out.println("Encoded text is: " + text);
               break;
            case DECODE:
               // get message to decode from user, and decode it using
               // the current cipher value
               text = getText(input, PROMPT_DECODE);
               text = decode(text, offset);
               System.out.println("Decoded text is: " + text);
               break;
            case EXIT:
               // set exit flag to true
               finished = true ;
               break;
         } // end of switch on choice
      } while (!finished); // end of outer do loop
      // Thank user
      System.out.println("Thank you for using Cipher for all your" +
                         " code breaking and code making needs.");
}

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POINTS WILL BE AWARDED,
REGARDS,
jagrut bharatkumar Shukla

hi,
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www.abap4u.com
http://help.sap.com/saphelp_nw2004s/helpdata/en/5e/88d440e14f8431e10000000a1550b0/frameset.htm
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http://help.sap.com/printdocu/core/Print46c/en/data/pdf/BCSRVALV/BCSRVALV.pdf
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