How to compile multiple java programs.

Hi,
I have different java classes located in a hierarchy of folders, how can I complile all of them in a batch and place all class files in a specified folder ?

You can specify more than one file "javac file1.java file2.java" and use the file wildcard. "javac directory1\*.java directory2\*.java"
Keep in mind that javac will use the Classpath to find classes.

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Compiling one java program by another

hi ppl
how to compile a java program by another java program by using javac command.
that is prog A must compile prog B using " javac B.java" command

Try com.sun.tools.javac.Main.
You require JDK_HOME/lib/tools.jar in CLASSPATH.

How to compile a java source from a java program

Hi .
I would like to know how to compile my java source from inside an execution of a java program.
Is there another way than rather use :
Runtime.getRuntime().exec("javac myFile"); ?

you can and cann't use the source code of javac... or maybe use jikes...

How to call a java program in javafx class(Urgent) and even vice versa

Hi all,
Here I have two questions:
1)
Please let me know how to call a javafx in java program...
I tried with the following code but it is not working..
The below is the java program in which I made a call to the Fx program.
FxMainLauncher.java
import net.java.javafx.FXShell;
public class FxMainLauncher {
public static void main(String[] args) throws Exception {
FXShell.main(new String[] {"HelloWorld.fx"});
2) How to call a java program in javafx class
Here is my javafx program
import check.*;
import javafx.ui.*
var instance = new MyJava();
//visible:true
System.out.println("Number is: {instance}");
Here is my java program
public class MyJava {
public static void main(String args[])
System.out.println("JAVAFX TO JAVA");
Even this is not working please let me know ASAP
Thanks in advance,
V.Srilakshmi

GOT IT !!!
I had to change the name of the method in .h file generated by javah command. On doing
javac -d ../../classes HelloWorld.java
go to the ../../classes directory (where you have the class file) and do
javah HelloWorld
I got a HelloWorld.h file in which I had
JNIEXPORT void JNICALL Java_HelloWorld_display(JNIEnv *, jobject);
I added the package name too:
JNIEXPORT void JNICALL Java_GUI_HelloWorld_display(JNIEnv *, jobject);
The HelloWorldImp.c file should have the same name (ie with package) and be in the same directory(ie ../../classes)
compile and build the shared library to get "libhello.so" file
gcc -c -fPIC -I/usr/lib/j2sdk1.3/include -I/usr/lib/j2sdk1.3/include/linux HelloWorldImp.c
gives .o file
gcc -shared -o libhello.so HelloWorldImp.o
gives .so file
then run java with the command in my first message. It works.
Thanks for the reply "thedracle".

Compiling multiple java

Hi. I have a question on how to compile many .java files, which are stored in various dirrectories (packages). There are literally hunderds of files. All are stored in a dirrectory tree that takes orign in .. let's say .. "Src" and branches down from it.
I specifically want to use 'javac' compiler.
When I am the 'src' folder I want to say
prompt> javac [option] *.java
Now I'm not sure what that option is. It basically have to tell the OS to compile all files in all the subdirectories of src and their corresponding subdirectories. A recursive compilation that is.
Would appreciate any help.
Thanks

prompt> javac [option] *.java
Now I'm not sure what that option is.There is no option to "recursively" compile .java source files.
Unlike some languages the source file name and the name of the
directories it is in are intimately related to the type of the class being
compiled. You specify a .java source file (or multiple source files) and
using what it knows about the source file names, and what you set
the classpath to be, the compiler will determine what needs to be
compiled and where the source files are located.
Have you read the documentation for javac?
http://java.sun.com/j2se/1.5.0/docs/tooldocs/windows/javac.html
The command (or commands) you use will almost certainly involve
the -d option to set the destination directory, the -classpath option to
set the classpath and possibly the -sourcepath option. There are
examples given for both compiling multiple files, and compiling where
source and class files are in separate directories.
If you obtained these files from somewhere it might be a good idea to
consult whatever documentation is available. In particular you are
looking for some description of the "build" process. Building a large,
related, set of files could involve installing and using a tool like Ant.

How to compile a java file which is in memory?

how to compile a java file which is in memory?
such as:
String s="class MyClass {....}";
how to compile the string?
thx

come on ...That was a perfectly valid solution.
Do you know how to call the sun.* compiler? If not then search the forums for it. If that interface still exists (which it might not in newer versions) you then will create a string stream from your class and pass it to that.

How to make a Java program that recognises a function of two variables...

How to make a Java program that recognises a function of two variables to assign values to that?
First I will give an example and then do the question.
Ex1.
We have any function, eg.y = x ^ 2 + 1 (read 'y' equals 'x' high to the square), a function of the second degree.
To build the graph of this function attach values to 'x' to find the values of 'y'
And thus mount the pair ordered (x, y) which represents a point on the Cartesian plane.
Assigning values to 'x' 'we can build up a table that gives us the pairs ordered:
We can use any numbers, but arfer interval [-3.3]
X | y = x ^ 2 + 1
-3 | Y = (-3) ^ 2 +1 = 10
-2 | Y = (-2) ^ 2 +1 = 5
-1 | Y = (-1) ^ 2 +1 = 2
0 | y = (0) ^ 2 +1 = 1
1 | y = (1) ^ 2 +1 = 2
2 | y = (2) ^ 2 +1 = 5
3 | y = (3) ^ 2 +1 = 10
We then ordered the pairs:
(-3.10), (-2.5); (-1.2), (0,1), (1,2), (2,5), (3,10)
Tabem that can be represented by a table:
X | y
-3 | Y = 10
-2 | Y = 5
-1 | Y = 2
0 | y = 1
1 | y = 2
2 | y = 5
3 | y = 10
Now I begin to explain my doubts.
See this program:
Ex2
* To change this template, choose Tools | Templates
* And open the template in the editor.
Encontrando_o_valor_de_y package;
* @ Author des Soldat Gottes
Import javax.swing.JOptionPane;
Public class (Main
* @ Param args the command line arguments
Public static void main (String [] args) (
Int x, y;
String x1;
X1 = JOptionPane.showInputDialog ( "We have the function y = x + 1 \ n" +
"Assign a value for 'x',"); / / receives a value for the function y = x + 1
X = Integer.parseInt (x1); / / tranforma String in int
Y = x + 1; / / receives the value of 'x' and calculates' y '
JOptionPane.showMessageDialog (null, "The value of 'y' is: \ t \ t" + y);
/ / Displays the value of 'y'
System.exit (0);
We see that the program receives above a value for 'x' and replaces the function contained in the program, y = x + 1, and so is the value of the variable 'y'.
In: x1 = JOptionPane.showInputDialog ( "We have the function y = x + 1 \ n" +
"Assign a value for 'x',");
The entry is a number and that number is assigned aa ja existing function in the (y = x + 1).
The question is: would it be possible to come to a function?
Ex: the program ask: DIGITE THE FUNCTION?
The USUARIO DIGITARIA A FUNCTION ANY, TYPE: y = x ^ 2 +1
The program would recognize the function and give numerical values to that function as Ex1, at the beginning of this text.
And then to find the values of the x and y launch a table.
It would be possible that?
By invez of entering with a number so that the program sustitua a function ja existing as Ex2, seen above, entering with a function quaquer (type: y = x ^ 2 +1) for the program atribuisse values to that function and then create a table of values as Ex1.
I hope it has been easier to understand my doubts now.
Thank you for your attention!
God bless!

rafaelmenezes wrote:
Thanks for the explanation, could understand what fly said.
But as it applied to a program?
How to create a program that recognizes that the entry coefficients?Are you asking about how to parse out the coefficients from the string "3x^4 + 4x^3 - 8x^2 + 5x^1 + 2x^0"? If you define the format to strictly follow that example, this should get you started:
Strip out the spaces
Split the String on "x^"
That should give you [3, 4+4, 3-8, 2+5, 1+2, 0]
Split each resulting String on "+ | -", preserving the operator as a token so you can apply the correct sign to the coeff.
That should leave you with [3, 4, +, 4, 3, -, 8, 2, +, 5, 1, +, 2, 0]. Every other number is a coeff, the rest are the degrees.
You can strip out the +, since those coeffs are already positive, and strip out the - after negating the following number. This is all assuming that you have to write this yourself. There is no doubt already a library or 5 out there that does this for you.

How to compile a java file in J9 for windows mobile 5.0

I have downloaded J9 for windows mobile 5.0 and need help on how to compile a java file.

You can compile your source code using J2SE ;)
may be this is important for you:
http://awareness.ics.uci.edu/~rsilvafi/pocketPC/index.
html
Regards!!!Actually i am using some eSWT related classes also.. so is there any way to compile from the J9 environment using J9 console..

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I need to know how to design a java program to java
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mobile phone? also i need to know how to create a
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http://java.sun.com/docs/books/tutorial/deployment/jar/index.html

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I have created a java strored procedure , which would be invoked by oracle function.
This java stored procedure is get compiled via SQL plus. While compiling by the use of putty , it shows lots of compilation error .
How to compile Oracle java strored procedure in Putty??

You'll need to add the j2ee.jar to your classpath. Usually you'll have to add some jars from your app server to your classpath as well.
For example (using weblogic):
javac -classpath c:\java\j2ee\j2ee1.3.1\lib\j2ee.jar;c:\tools\appserver\weblogic\wl7.1\lib\weblogic.jar
HelloServlet.java

How to run a java program in another folder

Hello!
I want to run for example the java class file in the path ./sourcecode/javafile.class. It works fine if I do the following:
cd sourcecode
java javafile
but it cannot work if I do:
java sourcecode/java
The error it outputs is NoClassDefFoundError.
Can someone tell me how to run a java program in another folder
thanks a lot.

You need to specify the classpath using the -cp flag when running. so instead of
"java sourcecode/javafile"
Try
"java -cp sourcecode javafile"

How to invoke a Java Program from Oracle 10g?(uRGENT)

Hello.
I've a query, that i have a program, that basically retreives the records from the
oracle table and then parser this information and then insert the values in corresponding database base tables. I want that, whenever the new program is inserted, a Trigger should fire and pass the most recently entered record to the Parser Program, means
1) Firing a Trigge
2)Storing the most latest data and pass it to the Parser PROGRAM
Can someone tell me how to do this? How to invoke a Java Program from within the database? Please if anyone has examples provide me. Its very urgent and tell me what is the basic mechanism.
Thankyou.
Ben

With Java Stored Procedures Java may be caleed from a database.
http://www.oracle.com/technology/tech/java/jsp/index.html

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HelloServlet.java:2: package javax.servlet does not exist
import javax.servlet.*;
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You'll need to add the j2ee.jar to your classpath. Usually you'll have to add some jars from your app server to your classpath as well.
For example (using weblogic):
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HelloServlet.java

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Hi All,
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I have copied all those imported files to my local system and when I try to compile , it still throws an error that some class files used by the classes imported in seeded CO are missing. Now this goes on and on. ( Seems entire server needs to be on my local system).
Now I decided to port the custom CO to server and compile it there. Even this seems to be a hard task for me as the javac command is not working on the server. It throws following exception
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Hi Avajain & D.Ram ,
Thanks for the reply.
I have downloaded around 70 dependent class files to local system. Now the CO is getting compiled correctly.
I am extending a region level controller in Payroll page where in I have to default the salary to a predefined value.
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How i can call java program in VB2005 ?

Hi members...
Please...please...please...
If any one now how i can call java program in VB.net program and open it ,please i want now the way to do it by details and by examples and step step to do it ,,..
thanks ...

If your server does not return to the command prompt, write a java programm which starts your server and returns to the command prompt.
An example for an application like this:
import java.io.IOException;
public class StartApp
public static void main(String[] args)
if (args.length > 0)
StringBuffer cmd = new StringBuffer();
for (int index = 0; index < args.length; index++)
cmd.append(args[index] + " ");
try
Runtime.getRuntime().exec(cmd.toString());
catch (IOException ioe)
System.out.println("Error: command not found: " + cmd.toString());
else
System.out.println("Error: missing arguments");
An example for starting your server with that programm:
/usr/bin/java -jar ./StartApp.jar /usr/bin/java -jar ./myServer.jar
It works. Have fun.

How to compile multiple java programs.

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