What to do about Java?

I just updated my old iMac(10.7.5), and it included a Java update. What should I do about Java? I have it disabled in Safari and Firefox at the moment for security reasons. So do I leave everything as is or do I need to uninstall java? Help.

JazzmanJohn wrote:
So are you saying to ignore the latest update and leave it disabled?
If it were me I would always keep it up-to-date in case I find some day that I must enable Java to do a critical task. That would not be the time to try and figure out if it's up-to-date or not.
That being said, there are somewhere between five and eight new vulnerabilities in that latest update.
To keep track of that watch this site http://java-0day.com periodically.

Similar Messages

What is "dynamic" about Java?

hi
I'm new to Java and programing in general
There are few things I don't understand about Java and OOP in general.
1)
How does memory allocation in Java differ from memory allocation in, say, C or pascal?
* memory for all the variables declared in C is allocated at compile time. This way program can figure out at compile time whether there is enough memory to run a program.
In Java memory for primitive types is allocated at compile time, but memory for objects is allocated at run time.
So in other words, program has no way of knowing ( prior to running ) whether there is enough memory to run the program?
2)
Word "dynamic" is often used when talking about java. Does word dynamic in context of Java only refer to dynamic memory allocation, or does Java have some other "dynamic" features also?
thank you

No quiant like:
Sitting in the sun with a book on Java;
going back inside by the lamp with Lava.
Swimming in the stream having nay a botha;
laying on the shore to rest when I feel I'd ratha.
Flying paper kites at the beach in summer;
feeling wind in my hair, hear a distant hum<m>er.
Going to the strip, hear the distant thunder;
hear the flathead roar, see the red-light blunder.
[pre]
~Bill

What is happening about Java System Identity Synchronization for Windows

I have been playing with "Java System Identity Synchronization for Windows" for a while now. I am about to swich over to is 100%, but I am worried that the latest version is "Windows 1 2004Q3".
Has any one got any ideas about this. The product sort of works, and is much smaller that going for the whole "Java System Identity Management Suite 2005Q4" which is way to big and complicated for our and I think many people.
Don't forget Microsoft have now release its own tools to do this in the latest Windows 2003 SP.
Andrew

ISW is already present in the 5.2p4 and 5.2p6 archives.
dn: cn=pswsync,cn=plugins,cn=config
objectClass: top
objectClass: nsSlapdPlugin
objectClass: ds-signedPlugin
objectClass: extensibleObject
cn: pswsync
nsslapd-pluginPath: /export/home/abc/local/ds52p6/lib/psw-plugin.so
nsslapd-pluginInitfunc: pswsync_init
nsslapd-pluginType: preoperation
nsslapd-pluginEnabled: off
creatorsName: cn=server,cn=plugins,cn=config
modifiersName: cn=server,cn=plugins,cn=config
createTimestamp: 20090121011643Z
modifyTimestamp: 20090121011643Z
nsslapd-pluginId: Identity Sync for Windows
nsslapd-pluginVersion: 5.2_Patch_6
nsslapd-pluginVendor: Sun Microsystems, Inc.
nsslapd-pluginDescription: Identity Synchronization for Windows Plug-In

What is new in Java syntaxes in new Java versions?

What is new in Java syntaxes in new Java versions?
What about this sentenses
1. for (int c:data), where data is array of integer
2. ArrayList<Object> () ...
3. Class<?>...
I can't find this syntaxes in my books and documentation...
And what Java version is latest?

dont crosspost
Edited by language police

Why can't i install java on os 10.7, under install it says error something about java script

why can't i install java on os 10.7, under install it says error something about java script

If you can't get any software updates, there is something wrong and I would suggest reinstalling Lion.
What errors do you get when you try to install the updates?
What is the build number of Lion. Look in About this Mac and click on the version number.

Questions about Java Servlets and JSP

Hi,
I'm a confident Java Programmer (and really enjoy using this language) but am very new to Java servlets and Java Server Pages.
I have previously worked with Perl on my web projects (simple 'league' style voting pages). I read in my 'Core Java' book that I should no longer use perl or even cgi.
I need to know more about Java servlets and Java Server Pages so I can make the switch to a 'real' programming language.
I have a few questions:
How should I start to learn JS and JSP?
How applicable will the java knowlegdge I have already be?
Are JSP common on the world wide web?
What tools do I need to start? (I currently develop in JBuilder and have Java 1.4.1 Standard Edition)
Is it likey my web host (and others) will support JSP?
Thank-you very much for helping a novice get started,
Regards,
Paul

Hi, Steve ...has to be frustrating! But do not despair.
Let's suppose the servlet it's named MyServlet on package org.servlets
WEB-INF should look:
WEB-INF
classes
org
servlets
MyServlet.class
web.xml
web.xml file should have this two declarations:
<web-app>
<servlet>
    <servlet-name>MyServlet</servlet-name>
    <servlet-class>org.servlets.MyServlet</servlet-class>
</servlet>

<servlet-mapping>
    <servlet-name>MyServlet</servlet-name>
    <url-pattern>/MyServlet</url-pattern>
</servlet-mapping>

</web-app>Now, once the container starts (Tomcat?), you should be able to see that servlet in:
http://localhost:8080/[my-context/]MyServletAnd what my-context is? The web application context. This string should be empty if your're deploying to the root context, otherwise should the context name. In Tomcat, deploying to root context defaults to using webapps/ROOT.
Sorry for my English, but I felt the need to answer your request. I hope it helps despite my writing.

What's the best Java Editor?

Right now I'm using JCreator. I've tried JBuilder, but it keeps crashing on my machine and it runs damn slow...
Is there a better editor out there that shows your errors clearer and stuff?

The fastest "IDE" is actually a good text editor like
TextPad and your Java SDK. The learning curve is
basically nil, the cost is incredibly low, and you
have more learning opportunities. An IDE, however,
makes GUI building faster if you can live with the
limitations and excess code.Hi, I don't agree with you - using "only" a good texteditor for programing purpose is, in my opinion, the better way to Java - ok, you have to read a lot before you get in going, but I bet, when looking on 2 java newbies who invested 3 month in learning java, the one with the "editor only" will know more about java and building a GUI and his programs may be more compact . o O (*g* he had to type all this, so he begins to learn short coding earlier).
With an IDE you will - as a newbie - come earlier to little programs that work, but you will need more time to do the real thing, because your understanding of the java background is less - who reads the automatic generated parts of the program as a newbie? - And, given a normal texteditor to both of them - the 2 guys in the paragraph above - who would be able to write a little java program faster?
The learning curve isn't basically nil - if you really work on the topic of learning to write a java program, and not only arrange components on the screen and let the IDE work.
greetings Marsian
P.S.: I am German, my girl friend is English - she told me now, that she interprets your posting as postive to the editor only solution - hmm ... now I am confused - why do english talking persons don't say what they are meaning?

Need Information About Java Platform Overview For Manager (WJTB-310)

Hi, My name is Jeffry. I need information about Java Platform Overview For Manager (WJTB-310).
I need Information about table of contents, how long it takes to study that training (approximately), how many chapters are in that training, minimum Internet connection speed to access that training, and everything you know about WJTB-310.
Is there a synchronized audio in WJTB-310 ?
Is there a video streaming in WJTB-310 ?
Can I receive a certificate for any web-based training ? especially in WJTB-310 ?
Is there a programming language material in WJTB-310 or just an overview ?
Sorry for asking to many question
Thanks
Jeffry Kristianto Yanuar

I thought I'd give you a response even if I can't answer your question completely. (I think we ought to start a separate thread entitled "How do you get any replies on this forum???") Here is what I have been forced to do. I introduced some JavaScript on the web page that contains the applet I want to be run. The sole purpose of the JavaScript is to detect which platform the client is on. If it's not MacIntosh, then I have JavaScript write the <object><embed> tag used by the Java plug-in. It it is MachIntosh, then I have JavaScript write the regular <applet> tag and let the Mac browsers do as best they can. With mixed and disappointing results. Netscape 6.2 crashes with a lot of applets. IE 5 brings up the applet okay but certain Swing components aren't displaying properly. The MacIntosh I've been testing on is version 9.1. I'm trying OS X tomorrow.
Why don't you send a reply to my query under the Java Plug-in Forum--from aronsz, dated 06/11/02--if you have some more info by now. I sure would appreciate it.

Question about Java apps structure

Hello guys,
I'm a professional C++ programmer and I would like to start learning Java. I'm reading about Java from here and there and would like to ask you about how a java program is structured compared to C++.
So in C++, I have main.cpp (or any other file name, doesn't matter), which contains a the main() function, and I have .h and .cpp class files that I instantiate (basically) in my main function to get my program to work.
In Java, I'm confused and can't really find the "general" rule to how stuff are organised. I noticed that every class has a main function (why?), and there's no global scope. And "somehow", file names must exactly be equal to the class names.
The question is: how are Java files of classes (and other stuff, if available) are arranged to create a program? What's the standard why? And How can I have many classes together in a single main()?
Thank you for any efforts :-)
Edited by: 927494 on 13.04.2012 07:02
Edited by: 927494 on 13.04.2012 09:10

Thank you guys for the replies. I still have some more doubts :-)
Do I have to have a file for the implementation and a file for the definitons, like cpp and header files? or just everything inside the class?
Why does Netbeans fail to compile when I change the class name? what should I change with the class name in general to have it compile correctly? From what I understand till now, the top level class's name (the class with the main() function that's gonna be executed) has to be equal to the file name (and I got that this is the sufficient condition for the app to compile), while the same file can have more classes if I wish. Did I get that right?
I don't know if I get that right too, we pass only a SINGLE class/file to the compiler, and it automatically resolves ALLLL the included files automatically, unlike C++, where all cpp files have to be passed to the compiler/makefile to create object files, and then the executable is created after linking all those object files with the libraries together. i.e.: Java doesn't really need a makefile because making is really simple with only 1 filename. True?

Some questions about Java deployment steps and techniques

All my java experience is coding and testing in my local machine (where, of course, a jre is available), but ... when I deploy to other people, they may not have a jre or they may have a different version of it than the one needed to run my application. I've read different stuff online including jars and java web start but still I have many questions.
(1) first one first, Sun contradicts common sense, when it says that i can redistribute my own customized light version of their jre by taking out some files (java.sun.com/j2se/1.5.0/jre/README). there are two ways for me to get a jre: Way one is by downloading one from Sun, the download comes as an *.exe file and I don't see how I can take files out of it, so do you know how?. Way two would be by simply copying the set of files i choose (according to that Readme) from my current jre installation (the one on my \java\jdk\jre directory), does this make sense?, (if you're under windows) doesn't an installed version of a jre need a couple of dlls plus some new registry entries?, this contradicts common sense, if I'm not wrong, that Readme is a nonsense, but since that readme is at each of us jre installation \java\jdk1.x\jre\Readme, it can't be a nonsense, therefore I'm wrong, therefore the answer is either Way 1 or Way 2, HOW? ... or maybe there's a Way 3?
(2) Say I never read that Readme so I download the jre (as an exe) to bundle it along with my application in a jar ... now I'll give my neighbor either a jar with two exes or two exes jars ... is there a way to make a jar so that two files get executed? ... if the answer is No and I have competition from a second neighbor, then I believe I'm asking my first neighbor to choose my application based on our friendship, that's not reasonable if we are doing business, so Java loses.
(3) Say that my application is a single executable file like this,
class X{
public static void main(String[]$$$){
System.out.println("Console, where are you?");
At this point, say that my neighbor accepted the two executables, he executed the jre.exe and has jre6 in his system, now he double clicks on my X.jar ... it's a console application and jar files are not associated with the java.exe launcher since java 5, but with javaw which doesn't open any console ... how do i make it so a console opens and prints "Console, where are you?" ... do I ask my neighbor-customer to add a couple of lines to his path and open his console and (please) enter java -jar jarfile.jar? ... isn't it too much? ... i hope i'm wrong cause this is kind of discouraging
(4) I've read that by installing a more recent version of a jre on a system that has an older jre (there to help other applications work), I might be causing a problem for the other applications to run ... I guess that's the reason why that Readme kind of encourage to redistribute a "private" version of a jre (one that doesn't come with a java.exe launcher ... any feedback on this?
(5) I'm reading a lot of hype about Java Web Start ... it looks better than the traditional jar/jre deployment ... but setting up a MIME type to *.jnlp, it doesn't come with some free hosting I've checked ... somebody can recommend a free hosting service that allows to set a *.jnlp MIME? (I'll appreciate a suggestion here, cause I would like to test Web Start)... and, anyhow, how you people compare it with the paradigm of the single executable file?.
Thanks. Your feedback is highly appreciated.

jorgelbanda wrote:
..(5) I'm reading a lot of hype about Java Web Start ... It's gratifying to think that someone who wants to deploy apps., has the common sense to search first! You would not guess how I often I hear "I wanna' make an EXE" shortly followed by "What's webstart?".
...it looks better than the traditional jar/jre deployment ... but setting up a MIME type to .jnlp, it doesn't come with some free hosting I've checked ... OK. You cannot define new mime types, but perhaps the site already has it defined. An easy way to check is to upload 'any old file' that ends in .jnlp and use the [mime type checker|http://pscode.org/mime/] to see what content type it is served as.
..somebody can recommend a free hosting service that allows to set a .jnlp MIME? (I'll appreciate a suggestion here, cause I would like to test Web Start)... I'm pretty sure the Google based sites offer it.
Note that I edited the asterisks out of your post, to avoid the forum software parsing half the reply as bold.

URGENT !!!! I know nothing about java .... ;o)

Hi all,
here is my problem, I am working on a demo for a customer, I am business consultant and I know nothing about java and I have noone next to give a hand, so please help.
I integrated a content in a Learning Management System. When launching this content in the LMS, an applet is created. I get a first page where I have to chose an option. When clicking on any of the options, I get nothing. On my java console, I can read this :
java.lang.NoSuchMethodError: javax.swing.UIManager.c()Ljava/lang/String;
     at com.cbt.jasmine.Jasmine.Jasmine.b([DashoPro-V1.32-013000])
     at com.cbt.jasmine.Jasmine.JasmineApplet.run([DashoPro-V1.32-013000])
     at java.lang.Thread.run(Unknown Source)
What can I do to make this ******* content work.
Many thanks for your answers.
XToff.

First of all, nothing is urgent to us, only to you.
Second, the error is clearly stated being NoSuchMethodError i.e. the program is trying to call a method that hasn't been for some reason included in the program.
Third, I have no idea what Learning Management System is (and I'm not the only one).
Fourth, why did you put "Re: URGENT !!!! I know nothing about java .... ;o)" as the topic instead of "Learning Management System"?

Good Info About Java Technology

For people new to Java, copy and past the URL below for some great information about Java Technology.
Let me know what you think...
http://www-106.ibm.com/developerworks/java/library/j-starthere.html

Well, that's a good summary of all the Java technologies, and it's well organized for sure. Personally, I still think of java.sun.com as the definitive source for Java information, although I might peruse others from time to time also.

What is wrong about this DefaultTableModel code?

Hi,
Can anybody tell me what is wrong about the construction of my JTable. I create the instance of the below class and add to my JTable:
MyTableModel myModel = new MyTableModel();
JTable costTable = new JTable(myModel);
I can see printouts "MTM_1,2,3,4" then it gives me an exception
Exception caught in Scenegraph: 16 >= 16
The vector IFC_Tree.totalVector has members like:
IFC_Tree.totalVector[0]: [IFCBeam, 4.962499618530273, m3, 0.0, 0.0]
IFC_Tree.totalVector[1]: [IFCColumn, 13.84760570526123, m3, 0.0, 0.0]
IFC_Tree.totalVector[2]: [IFCFloor, 113.82814025878906, m3, 0.0, 0.0]
IFC_Tree.totalVector[3]: [IFCWall, 229.7195587158203, m3, 0.0, 0.0]
IFC_Tree.totalVector[4]: [IFCRoofSlab, 215.8400421142578, m2, 0.0, 0.0]
IFC_Tree.totalVector[5]: [IFCWindow_2.375*2.45, 8.0, number, 0.0, 0.0]
IFC_Tree.totalVector[6]: [IFCWindow_0.6*0.6, 20.0, number, 0.0, 0.0]
IFC_Tree.totalVector[7]: [IFCWindow_3.85*2.45, 3.0, number, 0.0, 0.0]
IFC_Tree.totalVector[8]: [IFCWindow_2.0*2.1, 2.0, number, 0.0, 0.0]
IFC_Tree.totalVector[9]: [IFCDoor_0.9*2.1, 17.0, number, 0.0, 0.0]
IFC_Tree.totalVector[10]: [IFCDoor_1.8*2.45, 2.0, number, 0.0, 0.0]
IFC_Tree.totalVector[11]: [IFCDoor_0.8*2.1, 28.0, number, 0.0, 0.0]
IFC_Tree.totalVector[12]: [IFCDoor_0.9*2.45, 11.0, number, 0.0, 0.0]
IFC_Tree.totalVector[13]: [IFCDoor_2.0*2.1, 2.0, number, 0.0, 0.0]
IFC_Tree.totalVector[14]: [IFCDoor_1.0*2.1, 4.0, number, 0.0, 0.0]
IFC_Tree.totalVector[15]: [null, null, null, TOTAL COST, 0.0]
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableModel;
import javax.swing.JScrollPane;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.JOptionPane;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import javax.swing.DefaultCellEditor;
import java.util.Vector;
//public class MyTableModel extends AbstractTableModel
public class MyTableModel extends DefaultTableModel
private boolean DEBUG = true;
static double totalCost = 0.0;
static Vector data = new Vector();
static Vector columnNames = new Vector();
static Vector tmp;
public MyTableModel()
System.out.println("MTM_1");
addColumn("IFCOBJECTS OR PROCESSES");
addColumn("QUANTITY");
addColumn("UNITS");
addColumn("UNIT COST (�)");
addColumn("TOTAL COST (�)");
System.out.println("MTM_2");
for(int i=0; i < IFC_Tree.totalVector.size(); i++)
System.out.println("MTM_3");
tmp = (Vector)(IFC_Tree.totalVector.elementAt(i));
System.out.println("MTM_4");
addRow(tmp);
System.out.println("MTM_5");
System.out.println("MTM_6");
public int getColumnCount()
return columnNames.size();
public int getRowCount()
public String getColumnName(int col)
public Object getValueAt(int row, int col)
public boolean isCellEditable(int row, int col)
public void setValueAt(Object value, int row, int col)
}

Hi,
Can anybody tell me what is wrong about the construction of my JTable. I create the instance of the below class and add to my JTable:
MyTableModel myModel = new MyTableModel();
JTable costTable = new JTable(myModel);
I can see printouts "MTM_1,2,3,4" then it gives me an exception
Exception caught in Scenegraph: 16 >= 16
The vector IFC_Tree.totalVector has members like:
IFC_Tree.totalVector[0]: [IFCBeam, 4.962499618530273, m3, 0.0, 0.0]
IFC_Tree.totalVector[1]: [IFCColumn, 13.84760570526123, m3, 0.0, 0.0]
IFC_Tree.totalVector[2]: [IFCFloor, 113.82814025878906, m3, 0.0, 0.0]
IFC_Tree.totalVector[3]: [IFCWall, 229.7195587158203, m3, 0.0, 0.0]
IFC_Tree.totalVector[4]: [IFCRoofSlab, 215.8400421142578, m2, 0.0, 0.0]
IFC_Tree.totalVector[5]: [IFCWindow_2.375*2.45, 8.0, number, 0.0, 0.0]
IFC_Tree.totalVector[6]: [IFCWindow_0.6*0.6, 20.0, number, 0.0, 0.0]
IFC_Tree.totalVector[7]: [IFCWindow_3.85*2.45, 3.0, number, 0.0, 0.0]
IFC_Tree.totalVector[8]: [IFCWindow_2.0*2.1, 2.0, number, 0.0, 0.0]
IFC_Tree.totalVector[9]: [IFCDoor_0.9*2.1, 17.0, number, 0.0, 0.0]
IFC_Tree.totalVector[10]: [IFCDoor_1.8*2.45, 2.0, number, 0.0, 0.0]
IFC_Tree.totalVector[11]: [IFCDoor_0.8*2.1, 28.0, number, 0.0, 0.0]
IFC_Tree.totalVector[12]: [IFCDoor_0.9*2.45, 11.0, number, 0.0, 0.0]
IFC_Tree.totalVector[13]: [IFCDoor_2.0*2.1, 2.0, number, 0.0, 0.0]
IFC_Tree.totalVector[14]: [IFCDoor_1.0*2.1, 4.0, number, 0.0, 0.0]
IFC_Tree.totalVector[15]: [null, null, null, TOTAL COST, 0.0]
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableModel;
import javax.swing.JScrollPane;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.JOptionPane;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import javax.swing.DefaultCellEditor;
import java.util.Vector;
//public class MyTableModel extends AbstractTableModel
public class MyTableModel extends DefaultTableModel
private boolean DEBUG = true;
static double totalCost = 0.0;
static Vector data = new Vector();
static Vector columnNames = new Vector();
static Vector tmp;
public MyTableModel()
System.out.println("MTM_1");
addColumn("IFCOBJECTS OR PROCESSES");
addColumn("QUANTITY");
addColumn("UNITS");
addColumn("UNIT COST (�)");
addColumn("TOTAL COST (�)");
System.out.println("MTM_2");
for(int i=0; i < IFC_Tree.totalVector.size(); i++)
System.out.println("MTM_3");
tmp = (Vector)(IFC_Tree.totalVector.elementAt(i));
System.out.println("MTM_4");
addRow(tmp);
System.out.println("MTM_5");
System.out.println("MTM_6");
public int getColumnCount()
return columnNames.size();
public int getRowCount()
public String getColumnName(int col)
public Object getValueAt(int row, int col)
public boolean isCellEditable(int row, int col)
public void setValueAt(Object value, int row, int col)
}

Need to find a book about Java history

Hello,
I'm not sure I am posting in the right forum, but anyway...
I am currently performing a research entitled "The use of the Java platform in the entertainment industry". To begin, I need a book where I could find hitorical information about Java cretion and evolution, but I can't manage to find one. The history given on the java.sun.com website is way too short and all the books I could find deal with technical aspect of Java...
Does anyone knows a book that could interest me?

Thanks for the links, but as it is an academic
dissertation, I'd rather find a book... The Internet
is still not really trusted as an academic source of
information.
So there's no chance for me to find a book with a
proper history (better than the half page introduction
in present in every Java programming book)Well then why not try journals? You won't find one book from which you can write your whole thesis, and if you did, you probably wouldn't get very good marks. As a guide, my MSc dissertation had around 300 references and 60k words, which is not uncommon. Journal articles are far more targetted, and certainly more likely to cover such a specific area as what you are asking of.

What is an enterprise java bean

Hi,
What is an enterprise java bean. How is it different from normal java means.
Thanks a lot,
Chamal.

Well an EJB is a object components that lives in the server's container's guts, there are 3 kinds of EJB:
* Session Beans: performs bussines operations
* Entity Beans: represents a table from a relational database
* Message Driven Beans: receives and controlls messages.
more information about it can be found at: http://java.sun.com/products/ejb/reference/docs/index.html

What to do about Java?

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