Converting String into Java code

Hi everyone,
I will describe the scenario I have. I have a GUI application. I want the user to write some Java code in a text box and plug that code during runtime. Is there a way in Java so that a string could be used as a Java code?
You help is really appreciated.
Thanks
RG

catch the string input
output string (code) to file
call javac on the file you made
that's it, you have a class, and you can run it/load it

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Convert string into java.sql.Date

Hi,
I want to convert a date in string form into java.sql.Date to persist into the database column with Date as its datatype in Oracle. I'm trying as follows:
import java.sql.Date;
import java.text.ParseException;
import java.text.SimpleDateFormat;
public class DateTest
public static void main(String[] args)
String strDate = "2002-07-16 14:45:01";
     System.out.println("strDate = "+strDate);
Date aDate = null;
try
if(strDate != null && !strDate.trim().equals(""))
     SimpleDateFormat aSDF = new SimpleDateFormat();
     aSDF.applyPattern("yyyy-MM-dd hh:mm:ss");
     java.util.Date utilDate = aSDF.parse(strDate);
System.out.println("utildate = "+utilDate);
     aDate = new Date(utilDate.getTime());
     aDate.setTime(utilDate.getTime());
     System.out.println("aDate = "+aDate);
catch (ParseException e)
System.out.println("Unable to parse the date - "+strDate);
catch (Exception ex)
ex.printStackTrace();
System.out.println("Caught Exception :"+ex.getMessage());
It gives the output as :
strDate = 2002-07-16 14:45:01
utildate = Tue Jul 16 14:45:01 IST 2002
aDate = 2002-07-16
If I put this value into the database table, I can see only the date. Time part is missing. Is this the problem with java.sql.Date or Oracle datatype Date? Please help me asap.
Thanks in advance.
Regards,
Rajapriya.R.

If I put this value into the database table, I can
see only the date. Time part is missing. Is this the
problem with java.sql.Date or Oracle datatype Date?This is not a problem, this is the defined behaviour of the Date type. RTFAPI and have a look at Timestamp, while you're at it.

How to transform this pascal code into java code!

I want to transform this pascal code into java code . Please tel me how to do it because I really don't know how to do it!
Thanks!
{CALCULATE HOHN-LONDON FACTORS}
var kk:tab4;
PROCEDURE INTENS(var kk:tab4);
begin
for n:=0 to nr+2 do
begin
kk^[1,n]:=sqrt(lup*lup*yg*(yg-4)+4*sqr(n+1)) +lup*(yg-2);
kk^[2,n]:= sqrt(lup*lup*yg*(yg-4)+4*sqr(n+1))-lup*(yg-2);
kk^[3,n]:=0.5*(kk^[1,n]*kk^[1,n]+4*(sqr(n+1)-lup*lup));
kk^[4,n]:= 0.5*(kk^[2,n]*kk^[2,n]+4*(sqr(n+1)-lup*lup));
kk^[5,n]:= sqrt(ldown*ldown*yd*(yd-4)+4*sqr(n+1)) +ldown*(yd-2);
end;
end;
BEGIN
new (kk);
intens(kk);
writeln(f2,' ','N ','V','branch ','H-L');
for n:=1 to np do
begin
fp1[n,v]:=(n-ldown)*(n+ldown+1)*sqr(kk^[2,n-1]*kk^[6,n]+4*(n+ldown)*(n-ldown+1));
fp1[n,v]:=fp1[n,v]/(4*(n+0.5)*kk^[4,n-1]*kk^[8,n]) ;
writeln(f2,' ',n,' ',v,' fp1 ',fp1[n,v]:10:2);
end;
for n:=1 to nq do
begin
fq1[n,v]:=sqr(kk^[2,n]*kk^[6,n]*(ldown+0.5)+4*(n-ldown+1)*(n+ldown+1)*(ldown-0.5)) ;
fq1[n,v]:=fq1[n,v]/(2*(n+0.5)*kk^[4,n]*kk^[8,n]*(n+1.5));
fq1[n,v]:=fq1[n,v]*(n+1);
writeln(f2,' ',n,' ',v,' fq1 ',fq1[n,v]:10:2);
end;
for n:=1 to nr do
begin
fr1[n,v]:=sqr(kk^[2,n+1]*kk^[6,n]+4*(n-ldown+2)*(n+ldown+1));
fr1[n,v]:=fr1[n,v]/(4*kk^[4,n+1]*kk^[8,n]*(n+1.5));
fr1[n,v]:=fr1[n,v]*(n-ldown+1)*(n+ldown+2) ;
writeln(f2,' ',n,' ',v,' fr1 ',fr1[n,v]:10:2);
end;

Basically it looks like this:
public class KK{
     private your_type[][] kk = new your_type[length][length];
     private void intens(your_type[] kk){
          for(int n= 0; n<nr+2; n++){
               kk[1][n] = Math.sqrt(lup*lup*yg*(yg-4)+4*Math.pow((n+1), 2)) +lup*(yg-2);
               kk[2][n] = Math.sqrt(lup*lup*yg*(yg-4)+4*Math.pow((n+1), 2))-lup*(yg-2);
               kk[3][n] = 0.5*(kk[1][n]*kk[1][n]+4*(Math.pow((n+1), 2)-lup*lup));
               kk[4][n] = 0.5*(kk[2][n]*kk[2][n]+4*(Math.pow((n+1), 2)-lup*lup));
               kk[5][n] = Math.sqrt(ldown*ldown*yd*(yd-4)+4*Math.pow((n+1), 2)) +ldown*(yd-2);
     public static void main(String args[]){
          KK k = new KK();
          k.intens(kk);
          System.out.println(f2 + ' ' + 'N ' + 'V' + 'branch ' + 'H-L');
          for(int n=1; n < np; n++){
               fp1[n][v] = (n-ldown)*(n+ldown+1)*Math.pow((kk[2][n-1]*kk[6][n]+4*(n+ldown)*(n-ldown+1)), 2);
               fp1[n][v] = fp1[n][v]/(4*(n+0.5)*kk[4][n-1]*kk[8][n]) ;
               System.out.println(f2 + ' ' + n + ' ' + v + ' fp1 ' + fp1[n][v]:10:2);
          for(int n=1; n< nq;n++){
               fq1[n][v] = Math.pow((kk[2][n]*kk[6][n]*(ldown+0.5)+4*(n-ldown+1)*(n+ldown+1)*(ldown-0.5)), 2);
               fq1[n][v] = fq1[n][v]/(2*(n+0.5)*kk[4][n]*kk[8][n]*(n+1.5));
               fq1[n][v] = fq1[n][v]*(n+1);
               System.out.println(f2 + ' ' + n + ' ' + v + ' fq1 ' + fq1[n][v]:10:2);
          for(int n=1; n < nr; n++){
               fr1[n][v] = Math.pow((kk[2][n+1]*kk[6][n]+4*(n-ldown+2)*(n+ldown+1)), 2);
               fr1[n][v] = fr1[n][v]/(4*kk[4][n+1]*kk[8][n]*(n+1.5));
               fr1[n][v] = fr1[n][v]*(n-ldown+1)*(n+ldown+2) ;
               System.out.println(f2 + ' ' + n + ' ' + v + ' fr1 ' + fr1[n][v]:10:2); //fr1[n][v]:10:2 --> Here you must use the BigDecimal class
}I'm not very sure because my pascal knowledge is extremely "dated".
What about the converter I told you about?

Converted WSDL into .java-files - and now?

I should implement a client for an existing web service. All I have is a .wsdl-file of the web service to call.
Therefore I used the eclipse's functionality to convert .wsdl into .java files, which generated some files for me, for example:
- interface XXX extending java.rmi.Remote
- interface XXXService extends javax.xml.rpc.Service
- class XXXProxy implements XXX
- class XXXServiceLocator extends org.apache.axis.client.Service
- class XXXSoapBindingStub extends org.apache.axis.client.Stub implements XXX
- class XXXRfcException extends org.apache.axis.AxisFault implements java.io.Serializable
- class XXXRfcExceptions implements java.io.Serializable
My question... what to do now? How can I get the service and call its functionality?
Your help is really, REALLY appreciated...

Hi,
Write client application like below.
public class Client{
public static void main(String [] args) throws Exception {
// Make a service
XXXService service = new XXXServiceLocator();
// Now use the service to get a stub which implements the SDI.
AddressBook port = service.getAddressBook();
// Make the actual call
Address address = new Address(...);
port.addEntry("Russell Butek", address);
Thanks&Regards,
M.Kumaraswamy.

Pythagors into java-code (i got the idea, i think, but need it simplified)

Goodday all :),
I have been trying to turn the forumula | a^2 + b^2 = c^2 | into java code.
To clear it up a little more;
1. Define unknown variable
2. Define values of other two variables
3. Program calculates
x1. unkown variable is 'a'
x2. b = 20 , c = 40
x3. a = [(40^2) - (20^2)] ^0.5 (sorry couldnt figure out superscript)
What i was thinking as a concept;
1. Java asks for uknown value -> user defines as 'a' , 'b' or 'c'.
2. Java If else statement
2.1 if 'd' -> java asks again
2.2 else 'e' --> java asks again etc (if else statemenst from d - z)
import java.io.*;
public class example {
     public static void main(String[] args) {
          System.out.println("define uknown value");
          BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
          boolean running = true;
          while(running) {
                    String line = reader.readLine();
                    if (line.startsWith("d")) {
                         System.out.println("wrong input, define unknown value");
                         running = true;
                         } else      if (line.startsWith("e")) {
                         System.out.println("wrong input, define unknown value");
                         running = true;
                         } else      if (line.startsWith("f")) {
                         System.out.println("wrong input, define unknown value");
                         running = true;
                         } else      if (line.startsWith("g")) {
                         System.out.println("wrong input, define unknown value");
                         running = true;and furter i was thinking;
If a, b or c is pressed it will ask for the values of the other two
and it will be such a code as above, repeating itself;
                    String line = reader.readLine();
                    if (line.startsWith("a")) {
                         System.out.println("please define b");
                         running = true;
                         if (line.startsWith("1")) {
                         int x = 1;
                         System.out.println("b=1");
                         running = true;
                         } else      if (line.startsWith("2")) {
                         int x = 2;
                         System.out.println("b=2");
                         running = true;
                         } else      if (line.startsWith("3")) {
                         int x = 3;
                         System.out.println("b=3");
                         running = true;and so on till, lets say 1000?
Now my question is;
Is this the right way to make this program?
I would have like a .java file of severel megebytes if i wanted the values to get up to 10000 or something >.<

Aargh! No. This code snippet might be of help.
try {
   int x = Integer.parseInt("42");
   System.out.println("X = " + x);
} catch( NumberFormatException e ) {
   System.err.println("Not a number: " + e);
   e.printStackTrace();
}You would probably also find it useful to read about "regular expressions" if you always expect the formula to have exactly the same form.

Convert string into XML inside BPEL

Hello ,
How to convert string into xml format ? And make element and define attribute inside it ??

There are several problems with your input:
1. Your xml is not well-formed because the attribute values should be enclosed withing double " quotes and not single ' quotes;
2. You use a prefix (sml) for the folowing part but you dont define the namespace:
<ids>
<VID ID="new"/>
<data>
<*sml:*attr name="std">
<sml:value></sml:value>
</sml:attr>
<sml:attr name="xde">
<sml:value></sml:value>
</sml:attr>
</data>
</ids>
Complete message should be:
<ids xmlns:sml="somenamespace">
<VID ID="new"/>
<data>
<sml:attr name="std">
<sml:value></sml:value>
</sml:attr>
<sml:attr name="xde">
<sml:value></sml:value>
</sml:attr>
</data>
</ids>
3. Do you assign this expression to a variable that is based on the schema of your message you want to parse
Regards,
Melvin
* TIP Answer the question as helpful or correct if it helps you , so that someone else will be knowing that this solution helped you or worked for you and also it gives points to the person who answers the question. *

"embed" image data into java code

I have a mind that is it possible embed image file into java code?
That mean an image file information already store in java code, thus no need using the image file in run-time. Then can prevent user change other image file instead.
Do anyone try before, are there technologies required?
I just want to know is it possible or not....thanks.

technologies? The solution you are asking for is all about storing your data in static variables such as byte[][] used to build your image instance. I guess you should have a look at the different constructors of BufferedImage.

Compile source string like java code

I need to calculate some user defined formulas in my application. I have this formula in string form (e.g. "operand1 * operand2 + operand3" ). I have gained operand values throught the reflection and pars this string throught the StringTokenizer. So I have parsed string with operand values and operators. Is it possible to compile this string like java code ?
Thanks for all hints

Compile to what - a class file?
Yes, it's possible if you don't mind using non-100% pure Java. You can compile them using the sun.tools.javac.Main class found from tools.jar in the lib directory of the jdk.
But from what you say it would be easier to use an existing expression evaluator. Take a look at JEP (jep.sourceforge.net) and BeanShell (www.google.com) before you make any decision.

Converting CPP code into JAVA Code

i have made a cpp file that is running fine... is ther a tool which can convert that cpp file into java file easily?

No

Converting String into SecretKey

Hi there,,
I'm having probs with decrypting my encrytped data.In fact I have encrypted the data on the client side and have sent the encrypted data and the key to the server database.On the server side I wanna retrieve the key and decrypt the encrypted data with the help of it but I'm finding no way to retrieve it as a key,,moreover while trying to cast the retreived string (having converted it to an Object),,I get the ClassCastException,,
SecretKey key=(SecretKey) myRetrievedKeyObject;
Hope somebody can help me out with this,,,sample code highly welcomed....
thanks...

Here's the class I'm using for encryption and decryption..
import java.security.*;
import java.io.*;
import java.util.StringTokenizer;
import javax.crypto.*;
import sun.misc.*;
import java.sql.*;
public class DesEncrypter {
Cipher ecipher;
Cipher dcipher;
DesEncrypter(SecretKey key) {
try {
ecipher = Cipher.getInstance("DES");
dcipher = Cipher.getInstance("DES");
ecipher.init(Cipher.ENCRYPT_MODE, key);
dcipher.init(Cipher.DECRYPT_MODE, key);
} catch (javax.crypto.NoSuchPaddingException e) {
} catch (java.security.NoSuchAlgorithmException e) {
} catch (java.security.InvalidKeyException e) {
public String encrypt(String str) {
try {
// Encode the string into bytes using utf-8
byte[] utf8 = str.getBytes("UTF8");
// Encrypt
byte[] enc = ecipher.doFinal(utf8);
// Encode bytes to base64 to get a string
return new sun.misc.BASE64Encoder().encode(enc);
} catch (javax.crypto.BadPaddingException e) {
} catch (IllegalBlockSizeException e) {
} catch (UnsupportedEncodingException e) {
} catch (java.io.IOException e) {
return null;
public String decrypt(String str) {
try {
// Decode base64 to get bytes
byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(str);
// Decrypt
byte[] utf8 = dcipher.doFinal(dec);
// Decode using utf-8
return new String(utf8, "UTF8");
} catch (javax.crypto.BadPaddingException e) {
} catch (IllegalBlockSizeException e) {
} catch (UnsupportedEncodingException e) {
} catch (java.io.IOException e) {
return null;
hope you can guide me...

Convert String to java UTC date then to sql date

Hi,
I am trying to convert string (MM/dd/yyyy format) to UTC date time and store in the database.
This is what I did:
String dateAsString = "10/01/2007";
SimpleDateFormat formatter = new SimpleDateFormat("MM/dd/yyyy");
formatter.setTimeZone(TimeZone.getTimeZone("GMT"));
formatter.setLenient(false);
java.util.date dateValue = formatter.parse(dateAsString, new ParsePosition(0));
dateValue will be Sun Sep 30 20:00:00 EDT 2007 in UTC.
Now I need to store this date and time to MS SQL database.
I used the following code:
java.sql.Date sqlDateValue = new java.sql.Date(parsedToDate.getTime());
But this code give only the date, not time 2007-09-30
Can anybody tell me how I can change this java date to sql date (or datetime?) so that I can get both date and time.
Thanks,
semaj

semaj07 wrote:
Hi,
I am trying to convert string (MM/dd/yyyy format) to UTC date time and store in the database.
This is what I did:
String dateAsString = "10/01/2007";
SimpleDateFormat formatter = new SimpleDateFormat("MM/dd/yyyy");
formatter.setTimeZone(TimeZone.getTimeZone("GMT"));
formatter.setLenient(false);
java.util.date dateValue = formatter.parse(dateAsString, new ParsePosition(0));
dateValue will be Sun Sep 30 20:00:00 EDT 2007 in UTC.
Now I need to store this date and time to MS SQL database.
I used the following code:
java.sql.Date sqlDateValue = new java.sql.Date(parsedToDate.getTime());
But this code give only the date, not time 2007-09-30
Can anybody tell me how I can change this java date to sql date (or datetime?) so that I can get both date and time.
Thanks,
semajTake a look at java.sql.Timestamp:
http://java.sun.com/javase/6/docs/api/java/sql/Timestamp.html
Edited by: hungyee98 on Oct 17, 2007 8:57 AM

How to convert string into date datatype

hi! there
i've a date in string format like MM/dd/yyyy
eg:String sDate = "01/30/2002";
and i want to convert this string format into java date format
same as 01/30/2002 only
when i write like this
SimpleDateFormat formatter = new SimpleDateFormat ("MM/dd/yyyy");
String sDate = "1/11/2002";
java.util.Date oDate = formatter.parse(sDate);
i'm getting the output
Fri Jan 11 00:00:00 GMT+05:30 2002
i just want the out put like 01/30/2002
plz,help me

Hi,
Just use back the SimpleDateFormat object you defined.
String myDateInStr = formatter.format(oDate);
this will format a java.util.Date object to a string representation according to the format you specified in the instantiation of SimpleDateFormat object.

How to convert string into date

Hi all,
I m new to JDeveloper
I m taking the date as a string then passing it as a string in the method.
I want to convert tht string into the date of format (DD-MON-YYYY) or any other format
require yur assistance in this job.
THANKXX in advance
ankit

Is this what you are looking for:
java.text.SimpleDateFormat formatter = new java.text.SimpleDateFormat("dd-MMMMM-YYYY");
java.util.Date date1 = null;
try
   date1 = formatter.parse("Thu Jun 3 09:09:30 2004");
catch(Exception e)
   e.printStackTrace();
System.out.println("Date1 in millis : " + date1.getTime());
System.out.println("Date1 in string : " + date1);
java.util.Date date2 = new java.util.Date(date1.getTime());
System.out.println("Date2 in string : " + date2);or look at http://java.sun.com/j2se/1.4.2/docs/api/java/text/SimpleDateFormat.html for more options

Using Textbox strings in Java code

Hi,
I wonder if anyone can help me with a problem I'm
having with a JSP.
I've got several text boxes on my JSP which are static and would like to access their contents from within some dynamic Java code contained within the same JSP. I.e If I have a text box whose name is my_text I
would like to use my_text as a string within my Java code.
Does anyone know how to do this?
Thanks,
Peter

actually u can user java variable values in a html form/javacript but not vice versa.

Tools for extracting strings from java code for internationalization

For legacy code with lots and lots of strings what method is typically used to extract strings for internationalization?
Am I right in thinking you couldnt simply grep for strings, it could get pretty complitcated, especially with escape characters, escaped quotes etc.,
-SK

When dealing with legacy code, it is nice to have an application that queries you as it extracts the strings. You have a choice whether to accept the string as a localizable entity or not.
There are several tools that do this...including some IDEs like JBuilder. Although it isn't a fully supported or robust tool, Sun has a utility for extracting strings in Java source files:
http://java.sun.com/products/jilkit/.
Regards,
John O'Conner

Converting String into Java code

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