Java - Eclipse debug applet with System.out.print in jboss console

I use System.out.print to debug my java programs using Eclipse. I'm new
with applets, and when nothing showed up in the applet window, I tried
using print statements. I was expecting to see them in the jboss console like
always, but there was nothing there. I tried looking this problem up
online and found nothing. Does anyone know how I can use print
statements to debug my applet? (Japplet to be specific).

System.out.println works for me. The output statment are visible in the Console Window within Eclipse.

Similar Messages

How to display double byte characters with system.out.print?

Hi, I'm a newbie java programmer having trouble to utilize java locale with system io on dos console mode.
Platform is winxp, jvm1.5,
File structure is:
C:\myProg <-root
C:\myProg\test <-package
C:\myProg\test\Run.java
C:\myProg\test\MessageBundle.properties <- default properties
C:\myProg\test\MessageBundle_zh_HK.properties <- localed properties (written in notepad and save as Unicode, window notepad contains BOM)
inside MessageBundle.properties:
test = Hello
inside Message_zh_HK.properties:
test = 喂 //hello in big5 encoding
run.java:
package test;
import java.util.*;
public class Run{
public static void main(String[] args){
    Locale locale = new Locale("zh","HK");
    ResourceBundle resource =
        ResourceBundle.getbundle("test.MessageBundle", locale);
    System.out.println(resource.getString("test"));
}//main
}//classwhen run this program, it'll kept diplay "hello" instead of the encoded character...
then when i try run the native2ascii tool against MessageBundle_zh_HK.properties, it starts to display monster characters instead.
Trying to figure out what I did wrong and how to display double byte characters on console.
Thank you.
p.s: while googling, some said dos can only can display ASCII. To demonstrate the dos console is capable of displaying double byte characters, i wrote another helloWorld in chinese using notepad with C# and compile using "csc hello.cs", sure enough, console.write in c# allowed me to display the character I was expecting. Since dos console can print double byte characters, I must be missing something important in this java program.

after google a brunch, I learned that javac (hence java.exe) does not support BOM (byte order mark).
I had to use a diff editor to save my text file as unicode without BOM in order for native2ascii to convert into a ascii file.
Even the property file is in ascii format, I'm still having trouble to display those character in dos console. In fact, I just noticed I can use system.out.println to display double byte character if I embedded the character itself in java source file:
public class Run {
     public static void main(String[] args) throws UnsupportedEncodingException{
          String msg = "中文";    //double byte character
                try{
                System.out.println(new String(msg.getBytes("UTF-8")) + " new string"); //this displays fine
                catch(Exception e){}
                Locale locale = new Locale("zh", "HK");
          ResourceBundle resource = ResourceBundle.getBundle("test.MessagesBundle", locale);
                System.out.println(resource.getString("Hey"));      //this will display weird characterso it seems like to me that I must did something wrong in the process of creating properties file from unicode text file...

Can't run java apps with System.out.println on any builder.

Hello,
I'm currently using Vista RC2, which is the immediate problem.
Classes with System.out.println won't launch the console window. As I'm a student and practicing on these steps, I do have quite a problem on my hands. I click on run, build succesfull, nothing happens.
I have tried Netbeans and Jcreator, and gave up on trying different builds, as I reckon I'll have to find some other way to counter this; any way to get println messages working in vista?

It is run as a desktop app, and other runs with commands such as JOptionPane do function, only the println windows don't appear at all. So I think JRE is installed and working.
I did notice there was one command for input where I'd be able to enter it at the bottom of Netbeans.
Like just now I clicked build and run for the following code
import java.util.*;
public class FirstProgram
    public static void main(String[] args)
        System.out.println("Hello out there.");
        System.out.println("I will add two numbers for you.");
        System.out.println("Enter two whole numbers on a line:");
        int n1, n2;
        Scanner keyboard = new Scanner(System.in);
        n1=keyboard.nextInt();
        n2=keyboard.nextInt();
        System.out.println("The sum of those two numbers is");
        System.out.println(n1+n2)
}Resulting in a brief flash of "input" in the output window (which is below the coding window) and it dissapears. But this also occurs when I don't include system scanner code.
Using commands in cmd
java -jar "C:\Users\Alegis\Netb\MyApp\dist\MyApp.jar"
Does not yield desired results either. Nothing happens.

Problem with national characters calling System.out.print(...)

I need to develop an application printing spanish characters like "�" (ce trencada) "�", "�", etc.
The problem is when I type
System.out.print("�")in my application, I get "plus-minus" symbol while executing it.
Anyone can help me, please?
Thank you in advance.

check the list of fonts available. You can use the following code for the purpose.
public static void main(String args[])
        String fonts[] = getFontNames();
        for(int i = 0; i < fonts.length; i++)
            System.out.println(fonts);
public static String[] getFontNames()
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
return ge.getAvailableFontFamilyNames();

Invoking Java from C and capturing System.out

Hi,
I know very little about C but have a question related to invoking a Java process from C. Perhaps someone can help me.
I've been looking at the example at http://java.sun.com/docs/books/jni/html/invoke.html and seen how to invoke my Java program with:
(*env)->CallStaticVoidMethod(env, cls, mid, args);
in their example the Java program prints one line to System out with:
System.out.println("Hello World " + args[0]);
and says running the program produces:
Hello World from C!
What I want to know is, how in the C program can I capture the output the Java program sends to System.out, as I want to do something with the output other than have it print into the console.
Hope that makes sense.

I'm not totally clear on your question but I'll take a stab.
It seems to me like you are trying to get the output from a java program into a C program. If this is the case then there are many ways to do this - many of which are more simple that using JNI. However, if you absolutely must use JNI for this application then I suggest you take some more time to learn about C and JNI as I imagine this sort of thing is non-trivial and will required a level of understanding of C that you currently don't have. You may also want to cross-post onto the JNI forum.
If you can do this without using JNI then I'd suggest doing the standard fork/exec/pipe routine. This means, that in your C program you will call the functions fork (to create a new process that is subordinate to the currently running one), exec (in the subprocess which will replace the current program image in memory with that of another program you wish to execute, in this case, a JVM with a running application), and popen (which creates a "pipe" between the standard output of the Java program [System.out] and some input stream in the C program).
Finding an example of a program that does this fork/exec/pipe pattern on the web shouldn't be too hard. Hope this helps.
-mike

J2me sdk 3.0 problems in System.out.print

Hi
I can not use println to print Chinese .
First I just use System.out.print("test") to print some debug information , and I surprised to find it print nothing.
Then I try System.out.println("test") and it worked well. But there still problem when print Chinese,
like System.out.println("测试") and it just print a mistake string as "??" !
Can some tell me how to solved it, thanks .

Note: This thread was originally posted in the [Sun Java Wireless Toolkit|http://forums.sun.com/forum.jspa?forumID=82] forum, but moved to this forum for closer topic alignment.

Problems with System.out.println()

I tried writing a simple 'Hello world'-program:
public class Test{
     public static void main(String[] args){
          System.out.println("Hello World!");
     }//main()
}//Test
But the text wouldn't appear in the DOS-window. The only text that showed up was the standard 'Press any key to close the window'. The program compiled without any problems, but didn't work when I tried to run it.
Does anyone have any idea what's wrong?

Are u sure , the main() class part is donecorrectly.
Becuse program will compile but not run without a
main() class.what do you mean by main() class???First of all main() is a method, not a class. The main() method the JRE recognizes and runs is the:
public static void main(String[] params)
If you don�t have exaclty those modifiers and receive an array of Strings parameter it will send you an runtime exception.
Your code compiles and runs fine, the problem isn�t really System.out.print() it is something with your configuration.
I have to rename the class to TestF. Here is the running:
C:\cJava>javac TestF.java
C:\cJava>java TestF
Hello World!

Difference between " system.out.print( ) " and " system.out.println( ) "?

Hi frnds, i m a beginner in JAVA today only started with the complete refrence....can you help me and tell the the Difference between " system.out.print( ) " and " system.out.println( ) "?

Rashid2753 wrote:
hi,Yes. But it's a good idea for new Java programmers to become accustomed to using helpful resources like the API Javadocs because it's much faster then waiting for replies everytime you have a question. For experienced developers the API Javadocs are an indispensible resource.

How to view System.out.print() messages for adapters in OIM 9.0.3

I have created an adaptor for OIM from a java jar file. When that adaptor executes after some updates on tables it produces some execptions/error.
I can not see the details of these exceptions as I do not know where is the standard output located when adapter is executed via OIM.
Where cen I see output from my code lines that contain: System.out.println()?
thanks

I am not sure if logging is enabled as OIM was installed previously by another person - how can I check if it is enabled and how to use log4j in this case?
OIM Design Console window shows no messages comming from my System.out.print() statements.
/br
Djeno

HOW TO system.out.PRINT a curly brace: {

How is it possible to print a { with command: system.out.print{ "text { text"}; ?
Thanks

How is it possible to print a { with command:
system.out.print{ "text { text"}; ?
ThanksYour command has 2 errors in it.
1) "system" must start with a capital "S"
2) You used curly brackets where you should have used parentheses
This works: System.out.print( "text { text");
(although I suspect that you really want to use println, not print)

Why System.out.println() is ok but System.out.print(); ?

why System.out.println() is ok but System.out.print();?
if i leave empty between parantheses in print .compiler gives error but println() doesnt?

gimbal2 wrote:
Think about it for a moment. What would System.out.print() do without any parameters? What CAN it do?That's easy: print() COULD behave like println() without writing a newline at the end ;)
But I agree with Kayaman and Ram: javadoc is very nice, you simply have to read it.

System.in.read and System.out.print questions

On the following code, two questions:
1. the output is not what I expected. Why doesn't the System.out.println(i+" "+(char)i); print everytime i press enter a character? It seems to print all at once after everything is entered.
package stars;
import java.io.*;
public class Stars {
public static void main (String[] args) throws IOException {
    String U="";
    System.out.print("What is your name: ");
    while (true) {
      int i=System.in.read();
      U+=(char)i;
      System.out.println(i+" "+(char)i);
      System.out.flush();
      if (i==10||i==13) break;
    System.out.println("\rHello "+U);
}C:\>java -cp . stars/Stars
What is your name: blah
98 b
108 l
97 a
104 h
13
Hello blah
2. What is the most natural way to check for the press of an enter key? Is there a java attribute or method for the "Enter key" since it is different on unix and ms-dos? Thanks

On the following code, two questions:
1. the output is not what I expected. Why doesn't
the System.out.println(i+" "+(char)i); print
everytime i press enter a character? From:
http://scv.bu.edu/Doc/Java/tutorial/java/nutsandbolts/input.html
================
"The read() method provided by System.in reads a single character and returns either the character that was read or, if there are no more characters to be read, -1.
When a program reads from the standard input stream, the program blocks waiting for you to type something in. The program continues to wait for input until you give it some indication that the input is complete. To indicate to any program that reads from the standard input stream that you have finished entering characters, type the end-of-input character appropriate for your system at the beginning of a new line"
================
In other words, Java can't do what you want to do.
<snip>
>
2. What is the most natural way to check for the
press of an enter key? Is there a java attribute or
method for the "Enter key" since it is different on
unix and ms-dos? Thanks
System.getProperty("line.separator");Jim S.

Strange System.out.print behavior inside a for loop

I'm trying to create a simple ASCII progress bar in the console that would display like this:
|--------------------------------------------|
============================More equal signs would appear as time goes on. At least this is what I want to happen.
Instead, what happens is, none of the equal signs are printed until the very end, after the for loop in which the System.out.print("=") statement is in, has exited.
This is my code (probably more than necessary is shown, but the important part is the for loop):
    public void addSomeDiffys(int numOfDiffys, int minInt, int maxInt) {
        Diffy currentDiffy;
        System.out.println("\nCreating Diffys.");
        System.out.println("|--------------------------------------------|");
        for (int i=0; i < numOfDiffys; i++) {
            currentDiffy = new Diffy(minInt, maxInt);
            if ((i/(double)numOfDiffys)*100 % 2 == 0)
                System.out.print("=");
            diffyList.add(currentDiffy);
        System.out.println("\n" + diffyList.size() + " Diffys created.\n");
        System.out.println("Sorting according to highest rating...");
        Collections.sort(diffyList,Diffy.HIGHEST_RATING_ORDER);
        System.out.println("Done.\n");
    }I also tried changing the System.out.print("="); to System.out.println("="); This time it works as expected, its just not very pretty...
I get something like this:
|--------------------------------------------|
=
=
=
=
=
=
=
=
=
=
=
=So again, when I use println, rather than print, the equal signs are printed over time, slowly, as the progress increases. When using print, Nothing happens for a long time, and then suddenly they all appear after the for loop has terminated, which makes no sense.
Thanks for any help.

When using print, Nothing happens
for a long time, and then suddenly they all appear
after the for loop has terminated, which makes no
sense.
Yes it does make sense! The characters are buffered inside the PrintStream and written when there is a full line to write. You could try a flush() after each = is written but I have no confidence that it will make any difference.

How to open the server log file that displays messages of System.out.print

Hi,
I am working on a j2ee project. How can we access the default log file? I have put many System.out.println(..) method in different classes in order to get the program flow and to track the origin of the error.
I opened the a log file named "defaultTrace.0.trc" in usr\sap\J2E\JC00\j2ee\cluster\server0\log installation directory. Although it shows the ecxeptions, It is not showing the messages that i have written to console with the help of System.out.println(..) method.
Can anybody tell me the location of the log file where i can find my messages sent through System.out.println(..) function?
Regards,
Sudheesh...

System.out.println goes to console, which is not a file... This whole thing is much easier if you use standard logging:
http://help.sap.com/saphelp_nw04/helpdata/en/d2/5c830ca67fd842b2e87b0c341c64cd/frameset.htm

How do you overwrite System.out.print()

I am sure there is a way to over write the last entry to System.out.print ?
I think it is by using an escape sequence (eg \t or \n), but cant work out which letter to use.
can any one help?
Simon

It's \r:
class Overwrite {
     public static void main(String[] args) {
          System.out.print("Old Text");
          System.out.print("\rNew");
}

Java - Eclipse debug applet with System.out.print in jboss console

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