Java Class Files
Is there anyway to make java class files run faster and more efficient?
Thanks!!
Yes, of course, optimize your code!!
Jeje... could you be more explicit? Are you facing any concrete problem?. If no the above is the best answer you'll get.
Abraham
Similar Messages
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How to read the java class file to convert it in java.
hello all,
i m developing the java application which generated the java code from the java 'class file' .
Can anybody please help me, Is any java support for reading the class file? or how to know the class file format?
I know the application javad, jad, javap which is doing the same thing.
thanks for reply,
- Jayddo you mean decompiling? there are tons of java decompilers available out there, what exactly are you trying to do here?
-
How to convert a .jsp to a .java/.class file for use in peoplesoft
Hi java/jsp experts,
I want to convert a .jsp to a .java/.class file. is there a tool available, please let me know if you have any pointers....
or can i do it manually:
these are a few lines that the .jsp contains, and i would like to translate this to be in .java/.class format:
<%@ page import="sun.misc.BASE64Encoder, javax.crypto., javax.crypto.spec."%>
<%@ page import="java.util.StringTokenizer" %>
<%@ page import="java.util.Map" %>
<%!
sb.append("<input type=\"hidden\" name=\"orderPage_serialNumber\" value=\"");
sb.append(serialNumber);
sb.append("\">\n");
return sb.toString();
%>
how can i translate the above import statements and html elements from jsp to java, please let me know.
Once i have the .java file created from the .jsp, I will compile .java to create the .class file and invoke the .class in peoplecode by using java apis available in peopletools.
Thanks in advance.Is there a way convert a binary .exe file( compiled by
another compiler) into Java .class/.jar file ? Anyone
know of a free program that can do this?It's not possible. There are many decompilers and disassemblers for Java but nothing will take you from ANY binary to Java source. It would be the end of computing as we know it and the beginning of a new era -:) -
How to convert dll to a java class file?
Hi folks:
I have some DLLs in VB and C++ and I wanna to convert them to a java class file. Does anybody know if exist a sw or easy way to do it?
thanks
AutairWell, I believe you could write JNI to call the functions in the DLLs, although I wouldn't recommend it. (You'd have a non-portable, fragile result.)
-
How to convert java .class file to .dll file
hi,
I got a problem, I have to convert my java .class file to .dll file. Microsoft VC++ program will invoke the converted .dll file.
Is there any other possibility.
I was confused.
Cam any body help me. If you are having solution for the can you send to my [email protected] account.
thanks,No, it is not possible to do what you are suggesting. Yes, you could produce a DLL that wraps the JVM and loads your java class exposing a C and/or C++ callable interface, but that is a lot to go through unless your class is VERY complex. Otherwise, you might want to just create and maintain two implementations.
-
How to access variables declared in java class file from jsp
i have a java package which reads values from property file. i have imported the package.classname in jsp file and also i have created an object for the class file like
classname object=new classname();
now iam able to access only the methods defined in the class but not the variables. i have defined connection properties in class file.
in jsp i need to use
statement=con.createstatement(); but it shows variable not declared.
con is declared in java class file.
how to access the variables?
thankshere is the code
* testbean.java
* Created on October 31, 2006, 12:14 PM
package property;
import java.beans.*;
import java.io.Serializable;
public class testbean extends Object implements Serializable {
public String sampleProperty="test2";
public String getSampleProperty() {
return sampleProperty;
}jsp file
<%@ page contentType="text/html;charset=windows-1252"%>
<%@ page import="java.sql.*,java.util.*"%>
<html>
<head>
<title>Schedule Details</title>
</head>
<jsp:useBean id="ConProp" class="property.testbean"/>
<body>
Messge is : <jsp:getProperty name="msg" property="sampleProperty"/>
<%
out.println(ConProp.sampleProperty);
%>
</body>
</html>out.println(ConProp.sampleProperty) prints null value.
is this the right procedure to access bean variables
thanks -
Converting Java class file to .dll
Dear all,
Is there any way to convert a Java class file to a .dll file?
(Background being that there is a software that only allows callouts to DLLs and the method I have developed is in Java so need to convert it to a .dll)
Any insight/advice/pointers are most appreciated.
Thanks much,
DavidHi there,
Yes you can convert a Java Class to DLL file using Microsoft Visual J#.NET (Installation required Visual Studio.NET) you can download it from the microsoft site.
www.microsoft.com/downloads
then go for search below in combo box(Visual J#.NET). After installation open new project select class library. write your java code(not fully supported j2se). build your application. All the Java Code is embeded in dll. Found at e.g. C:/JavaToDll/bin/debug/JavaToDll.dll This is a way to convert Java Code to a dll. frankly speaking i do not like .NET (copy of Java Technology must be baned completely).
Thanks
Please correct if i am wrong.
Yahya Kamran (Software Engineer) -
Where to find Java Class File Specification for Java 5.0?
Where to find Java Class File Specification for Java 5.0?
thank you in advance.same place you found it for 1.4Can u give more details? I thought the class spec for Java 1.4 is the same as Java 1.2.
anyone can tell where to find Java Class File Specification for Java 5.0?
Thanks. -
Problem in finding java class file
I am writting an application using servlets , JSP and a simple java classfile. The simple java class file is for connection pool and the name of connection pool class is DBConnectionManager . I am using JavaWebserver2.0 and I have placed this class file in .\JavaWebserver2.0\classes
I am placing my servlets in .\JavaWebserver2.0\servlets folder. Since I am using wfm package so my servlets are placed in .\JavaWebserver2.0\servlets\wfm .
The problem is with compiling the servlet placed in wfm folder . I get the following error:-
TestServlet.java:11:cannot resolve symbol
symbol: class DBConnectionManager
location: class wfm.TestServlet
However when I try to compile this class in servlets folder and remove the package statement from the source file, it compiles and works very fine. I am having lot of confusion as the class DBConnectionManager is in classpath but even then compiler gives error. The same class when placed in servlets folder and package statement is removed works very fine.
Kindly help.Hi,
Is the DBConnectionManager class declared public?
Does the TestServlet import the package that contains the DBConnectionManager?
This is all I can come up with, with the current information.
Cheers,
--Arnout -
In which directory should i keep java class files in oracle apps
hi
I have one problem, In which Top & directory should i keep java class files in oracle apps
krishnaHi
By itself its available in oracle\visappl\au\11.5.0\java\
thats were the location needs to be placed in the apps.zip.
Thanks
Riyas -
Error occured when using javap (Java Class File Disassembler)
Hi,
I have tried to use Java Class File Disassembler by using javap and i'm getting the error shown below,
C:\> javap abc.class
ERROR: Could not find abc.class
abc.class present in C:\ drive.
Please let me know how to solve the problem
Thanks in Advance
SoundarHi,
Thanks for your information, it works fine. Please let me know is there any option to display the method and variable implemation in abc.class.
I have tried javap abc it displays the method name only.
Thanks in advance,
Soundar -
Where to keep the java class file which is being used from a form?
Hi,
Actually I am developing a form which has a bean area and the data will be displayed in the bean area in the form of grid. And I will register this form with apps and will run the from Oracle apps. I want to know that there is a java class file that is being refered by the form, where should this java class file be placed and is there any other places where any changes are required so that the form runs correctly from the Oracle apps and can find the java class file.
I am very thankful to each and everyone who will be able answer this question of my.do you mean decompiling? there are tons of java decompilers available out there, what exactly are you trying to do here?
-
Loading Java Class File in JSP page
I'm trying to load a java class file from a jsp page.
(e.g. MyFile.java <-- Source "MyFile.class<--Class file of MyFile.java")
jsp page
<%@ include file = "MyFile.class" %>
<HTML> // HTML Tags are here
MyFile.java
A normal java source file that has "public static void main" in it.
My jsp page can display it's contents, 'except' for showing e.g. "1235%%215648%%public%%$$@##" through out the page...
My guess is that it can't display my java class file..
Can anyone please help me solve this problem of mine ?
Thanks in advance : )
Yours Sincerely,
RainbowEnergiesThis is my JSP file.
<HTML>
<HEAD>
<TITLE>Activity Games</TITLE>
</HEAD>
<%
String name = "";
String id = "";
name = session.getAttribute("name").toString();
session.setAttribute("name",name);
id = session.getAttribute("id").toString();
session.setAttribute("id",id);
%>
<BODY bgcolor="#cc99ff" text="#000000" link="#E3E3E3" vlink="#CCCCCC" alink="#FF0000">
<H3><%=name%>, you have enter Activity Games</H3>
<%@ page import="Games.Lufia.*" %>
<%Lufia lufia = new Lufia();%>
</BODY>
</HTML>
After I execute...
An error occurred at line: 18 in the jsp file: /jsp/ActivityGames.jsp
error: File C:\Program Files\Apache Tomcat 4.0\webapps\website\WEB-INF\classes\Games\Lufia\Lufia.class does not contain type Games.Lufia.Lufia as expected, but type Lufia. Please remove the file, or make sure it appears in the correct subdirectory of the class path.
Generated servlet error:
C:\Program Files\Apache Tomcat 4.0\work\Standalone\localhost\website\jsp\ActivityGames$jsp.java:85: Class Games.Lufia.Lufia not found.
Lufia lufia = new Lufia();
But if I comment this out....
This is my JSP file.
<HTML>
<HEAD>
<TITLE>Activity Games</TITLE>
</HEAD>
<%
String name = "";
String id = "";
name = session.getAttribute("name").toString();
session.setAttribute("name",name);
id = session.getAttribute("id").toString();
session.setAttribute("id",id);
%>
<BODY bgcolor="#cc99ff" text="#000000" link="#E3E3E3" vlink="#CCCCCC" alink="#FF0000">
<H3><%=name%>, you have enter Activity Games</H3>
<%@ page import="Games.Lufia.*" %>
<%//Lufia lufia = new Lufia();%> <--- comment this out.... (HERE)
</BODY>
</HTML>
The page shows but did not run my java class file..
Thanks again for trying to help me solve this problem of mine. : - )
Regards,
RainbowEnergies -
Determine the Java Class File Major & Minor Version
Did anyone tried to look at the Major & Minor version of a specific java class file.
Our server is running in version 1.3. We are including a third party class file, I like to check before our production move, whether the file is compiled is <= Jdk1.3.
Thanks in Advance.// 1) Download Jakarta BCEL
// 2) compile this class
import org.apache.bcel.classfile.*;
public class Main
public static void main(String[] args) throws Exception
printClassVersion("c:\\foo.jar", "com/foo/Bar.class");
public static void printClassVersion(String jarfile, String classfile) throws Exception
ClassParser cp = new ClassParser(jarfile, classfile);
JavaClass clazz1 = cp.parse();
System.out.println(jarfile);
System.out.println("Major: " + clazz1.getMajor());
System.out.println("Minor: " + clazz1.getMinor());
} -
How to decode java class file to java file
hi
how to decode java class file into java file
regards
kedarIts really.......... really BAD.
Write ur own code... or use open source code..
Its a bad practice...
however i am telling u ..there is DJ java decompiler.
but mind it there are Obfuscator also....like codeshield and others
take care...
Alok -
GME PLLs, forms and java class files???
Hi,
if we generate forms of GME from adadmin PLLs will also get generated but how to compile java class files of a product GME ?
simply we need to create jar files?
RegardsHi,
if we generate forms of GME from adadmin PLLs will also get generated but how to compile java class files of a product GME ?No.
simply we need to create jar files?What do you mean by "create jar files"? Do you want to compile java classes? If yes, then the correct syntax is as follows:
SQL> ALTER JAVA CLASS "Object Name" RESOLVE;Regards,
Hussein
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