Help needed on java Logger, please...........

Hi,
can anyone give me a good tutorial link on java Logger?
one more doubt,
In logging, in the log file the info is saved in XML format.
How can i change it to normal text format?
pls help.....
-Soni.

[url http://forum.java.sun.com/thread.jsp?thread=454149&forum=57&message=2068577]crosspost

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Help needed with java

Hello everyone
I'm a Student and new to java and I have been given a question which I have to go through. I have come across a problem with one of the questions and am stuck, so I was wondering if you guys could help me out.
here is my code so far:
A Class that maintains Information about a book
This might form part of a larger application such
as a library system, for example.
@author (your name)
*@version (a version number or a date)*
public class Book
// instance variables or fields
private String author;
private String title;
Set the author and title when the book object is constructed
public Book(String bookAuthor, String bookTitle)
author = bookAuthor;
title = bookTitle;
Return The name of the author.
public String getAuthor()
return author;
Return The name of the title.
public String getTitle()
return title;
and below are the questions that I need to complete. they just want me to add codes to my current one, but the problem is I don't know where to put them and how I should word them, if that makes sense.
Add a further instance variable/field pages to the Book class to store the number of pages in the book.
This should be of type int and should be set to 0 in the Constructor.
Add a second Constructor with signature
public Book(String bookAuthor, String bookTitle, int noPages) so it has a third parameter passed to it as well as the author and title;
this parameter is used - obviously?? - to initialise the number of pages.
Note: This is easiest done by making a copy of the existing Constructor and adding the parameter.
Add a getPages() accessor method that returns the number of pages in the book.
Add a method printDetails() to your Book class. This should print out the Author title and number of pages to the Terminal Window. It is your choice as to how the data is formatted, perhaps all on one line, perhaps on three, and with or without explanatory text. For instance you could print out in the format:
Title: Robinson Crusoe, Author: Daniel Defoe, Pages:226
Add a further instance variable/field refNumber() to your Book class. This stores the Library's reference number. It should be of type String and be initialised to the empty String "" in the constructor, as its initial value is not passed in as a parameter. Instead a public mutator method with the signature:
public void setRefNumber(String ref) should be created. The body of this method should assign the value of the method parameter ref to the refNumber.
Add a corresponding getRefNumber() accessor method to your class so you can check that the mutator works correctly
Modify your printDetails() method to include printing the reference number of the book.
However the method should print the reference number only if it has been set - that is the refNumber has a non-zero length.
If it has not been set, print "ZZZ" instead.
Hint Use a conditional statement whose test calls the length() method of the refNumber String and gives a result like:
Title: Jane Eyre, Author: Charlotte Bronte, Pages:226, RefNo: CB479 or, if the reference number is not set:
Title: Robinson Crusoe, Author: Daniel Defoe, Pages:347, RefNo: ZZZ
Modify your setRefNumber() method so that it sets the refNumber field only if the parameter is a string of at least three characters. If it is less than three, then print an error message (which must contain the word error) and leave the field unchanged
Add a further integer variable/field borrowed to the Book class, to keep a count of the number of times a book has been borrowed. It should (obviously??) be set to 0 in the constructor.
Add a mutator method borrow() to the class. This should increment (add 1 to) the value of borrowed each time it is called.
Include an accessor method getBorrowed() that returns the value of borrowed
Modify Print Details so that it includes the value of the borrowed field along with some explanatory text
PS. sorry it looks so messey

1. In the future, please use a more meaningful subject. "Help needed with java" contains no information. The very fact that you're posting here tells us you need help with Java. The point of the subject is to give the forum an idea of what kind of problem you're having, so that individuals can decide if they're interested and qualified to help.
2. You need to ask a specific question. If you have no idea where to start, then start here: [http://home.earthlink.net/~patricia_shanahan/beginner.html]
3. When you post code, use code tags. Copy the code from the original source in your editor (NOT from an earlier post here, where it will already have lost all formatting), paste it in here, highlight it, and click the CODE button.

Please help me on java Logger......

Hi,
can anyone give me a good tutorial link on java Logger?
one more doubt,
In logging, in the log file the info is saved in XML format.
How can i change it to normal text format?
pls help.....
-Soni.

Hi,
I guess, there is one tutorial for logger in java site...if not, try log4j tutorial of apache...both are the same. As for as ur question is concerned - if you dont specify a log formatter, java loads the default formatter from $JAVA_HOME/jre/lib/logging.properties
If you check there, by default you will have
java.util.logging.FileHandler.formatter = java.util.logging.XMLFormatter
u can change it to java.util.logging.SimpleFormatter
if you go through that properties file, i think it would be more than sufficient than beating the bush for tutorials. ;-)

Help Needed for Java Project

I have to do a project in my final year Computer Engineering. Can someone give me any ideas about project(to be done in Java)? If anyone can help me with any idea, please do so. Thank You!!

Hi,
I did a project on jsp and EJB called Dataminig implemented in Online shopping. Dataminig is an upcomming technology for Customer Relationship management. You can also do some kinda project like online patient monitering. In this project you can even see how to communicate through COM port.

Help with the java system, please !!

Each time i execute the following statement,
create or replace java system;
I get the following errors:
VM: Killing process oracle
end-of-file on communication channel
Can anyone help me with this problem, please?

My platform is Linux - Red Hat 6.2 -.
I did the changes in the sizes of the java_pool and shared_pool and I got the same problem.
But, I've just fixed the problem b increasing the size of the swap partition. I changed it from 100 MB to 1000 MB. Then, I got everything very clean.
Thanks a lot for your help and your consideration.

Java NetBeans IDE 6.1 Desing out of control, help needed!!! Please...

Hi,
I have a problem positionning the components in the desing view in NetBeans IDE.
I see some tutorial, its look realy easy but still, I don't get the result I want.
Did it exist a way to fix(lock) my component using the desing view?
When I try to rezise or move my component, the others start moving to and rezise making a complet non-sense and it's the free-for-all help!
Anyone know a link talking of desing in the netbeans more that the basic?(English or french or anyway any other language it's will stay more easy to understand than the move of the components in my interface)
How to select deselect blue anchor when I rezising to select what components will affect another one?
I know it's suppose to be more easy but maybe I do sometinhg wrong when I use the desing view I consider using another ide now ...
Thanks for your help and comment!
Edited by: equattro on Oct 5, 2008 10:02 AM
Edited by: equattro on Oct 5, 2008 10:03 AM
Edited by: equattro on Oct 5, 2008 10:28 AM

This is a forum for matters concerning the Java programming language, not for the NetBeans IDE. Try to find a NetBeans forum for your NetBeans problems.
I believe there's one on nabble.com and another on java-forums.org.
db

Please help: need a JAVA-only dialog instance profile

Who could help provide a complete example? Would be greately appreciated.
Thanks!!

HI
http://help.sap.com/saphelp_nw70/helpdata/en/c4/3a610f505211d189550000e829fbbd/frameset.htm
http://help.sap.com/saphelp_nw04/helpdata/en/c4/3a622d505211d189550000e829fbbd/frameset.htm
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I am working on a java 1.3 and JAXP1.1 written code. Now I want to compile and run it using J2SE 1.4. Here are the import statements from the existing code.
import org.xml.sax.*;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.Locator;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.XMLReader;
import org.xml.sax.InputSource;
import java.sql.*;
import java.net.*;
import java.io.*;
When I run the existing(using java 1.3 and Jaxp1.1) code I have to include the files crimson.jar and jaxp.jar in the windows 2000 CLASSPATH and works fine.
But when I compile and run it using J2SE 1.4 which has the built in support for the saxp, I thought that I don't have to specify any CLASSPATH for the new 1.4 so I don't specify any Classpath and it gives me the Microsoft "ClassFactory cannot find the requested class" error which means that even thought the new java 1.4 has the xml classes as libraries yet it still requies some .jar files to be listed in the CLASSPATH.
If I am right then what path will work(i.e what jar class I need to add to the CLASSPATH).
Thanks for your help.
RA.

Thanks for your reply,
I think I didn't specify when the error occurs. The ClassFactory related error occurs when I run the program, it compiles without any error.
From what I understood somewhere in the java 1.4 docs, that the new 1.4 has the xml libraries built in by default so one doesn't need to give the classpaths just like we don't give any CLASSPATH for using swing and many of the other java packages. That is one thing.
Second thing is that I also tried to use the java_xml_pack-spring02 and java_xml_pack-summer02; but non of them include the crimson.jar and the jaxp.jar files in them which are the 2 .jar files that makes the program run fine when used under the java 1.3 with combination of the jaxp1.1(which was downloaded seperately and then the CLASSPATH for it was set.).
Can you please help what .jar files do I need to use instead. I tried to use the ones that the new java_xml_pack-spring02 and java_xml_pack-summer02 has for the jaxp in them.
Thanks again.
RA

Help need in Java Web Service method receiving object values as null

Below is my web method and Package is the object received from dotnet client as a consumer. I have also defined the Package object structure. Now when I receive the data from dotnet I get only identifier value, but I get ownerid and price as null, even both values are sent by Dotnet client. I want to know whether only primitive datatype in java web service works or I need to do some configuration changes in order to have build in Wrapper class datatypes? It would be a great help if somebody explains.
@WebMethod
@WebResult(name = "PackageId")
public long createNewPackage(@WebParam(name = "Package") com.db.radar.wl.data.Package data1,@WebParam(name = "PackageDetail") PackageDetail data2,@WebParam(name = "PackageTrade") PackageTrade data3);
public class Package {
Long ownerid;
Double price;
long identifier;
}

Hi ,
I am getting the same error. I am running my application on jboss-4.0.4.GA. Please let me know the version of jboss that you to got it working.
Thanks
Viv

URGETN HELP NEEDED! JAVA APPLET READING FILE

Hi everyone
I need to hand in this assignment today
Im trying to read from a file and read it onto the screen, my code keeps showing up an error
'missing method body, or declare abstract'
This is coming up for the
public statuc void main(String[] args);
and the
public void init();
Here is my code:
import java.io.*;
import java.awt.*;
import java.applet.*;
public class Empty_3 extends Applet {
TextArea ta = new TextArea();
public static void main(String[] args);
public void init();
setLayout(new BorderLayout());
add(ta, BorderLayout.CENTER);
try {
InputStream in =
getClass().getResourceAsStream("test1.txt");
InputStreamReader isr =
new InputStreamReader(in);
BufferedReader br =
new BufferedReader(isr);
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
String line;
while ((line = br.readLine()) != null) {
pw.println(line);
ta.setText(sw.toString());
} catch (IOException io) {
ta.setText("Ooops");
Can anyone help me please?
Is this the best way of doing this? Once i read the file i want to perform a frequency analysis on the words so if there is a better method for this then please let me know!
Thankyou
Matt

Whether it is urgent or not, does not interest us. It might be urgent for you but for nobody else.
Writing all-capitals is considered shouting and rude.
// Use code tags for source.

Help needed with nokia 6300 please

I have nokia 6300 , I have unstalled many programs on it (like messenger and google earth java files) some of them needs to connect to internet through gprs but they give a message "Subscribe to packet transfer first". But my device connects to web and opens pages through explorer.
Please if any can give help and thanks to all.........

Are you sure your connecting by gprs to the net, or by other means say WIFI or wap? There are many packet services & not all are provided by ISP unless one subscribe to it.
Knowledge not shared is knowledge wasted!
If you find it helpfull, it's not hard to click the STAR..

Help need regarding Java Reflection

I need help in programming the following:
I have to generate a test Harness for OOP.This program that automatically tests
classes by instantiating them, selecting methods of these instantiated objects randomly or
using some criteria, invoking them, and using the returned values as input parameters to
invoke other methods. I have to use Java Reflection for this and methods must be of generic type!
For this
I have to generate a tree of functions(say 2 or 3).The functions could be say:int f(int){} and int g(int){}. or Int f(String), String g(float),Float h(int)..I have to create a tree of these function set and traverse them in BFS or DFS and generate combinations of these functions keeping some upper bound for the number of functions genrated(10) and size of combinations of functions(say 5).The output of one function should be the input to other function(so recursive).If any combination failed,then record(or throw exception).This all should be done using java reflection.The input can be provided though annotations or input file.This file can result in recording even the output for each function. I have tried using Junit for testing methods.My code with is following:I have two classes ClassUnderTestTests(which tests the methods of ClassUnderTest) and ClassUnderTest shown below
//Test Harness class
public class ClassUnderTestTests {
     Field[] fields;
     Method[] methods;
     Method minVal;
     Method maxVal;
     Method setVal1;
     Method setVal2;
     Method getVal1;
     Method getVal2;
     Class<?> cut;
     ClassUnderTest<Integer> obj1;
     ClassUnderTest<String> obj2;
     @Before public void setUp(){
          try {
               cut = Class.forName("com.the.ClassUnderTest");
          fields=cut.getDeclaredFields();
          methods=cut.getDeclaredMethods();
          print("Name of the CUT class >>"+ cut.getName());
          print("List of fields >>"+ getFieldNames(fields));
          print("List of Methods >>"+ getMethodNames(methods));
          //creating method objects for the methods declared in the class
          minVal=cut.getDeclaredMethod("minValue");
          minVal.setAccessible(true);
          maxVal=cut.getDeclaredMethod("maxValue");
          maxVal.setAccessible(true);
          setVal1=cut.getDeclaredMethod("setVal1", Comparable.class);
          setVal1.setAccessible(true);
          setVal2 = cut.getDeclaredMethod("setVal2", Comparable.class);
          setVal2.setAccessible(true);
          getVal1=cut.getDeclaredMethod("getVal1");
          getVal1.setAccessible(true);
          getVal2 = cut.getDeclaredMethod("getVal2");
          getVal2.setAccessible(true);
          } catch (ClassNotFoundException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          } catch (Exception e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
     @Test public void cutIntegertest(){
          //instantiating the class using the argument constructor for Object 1
          Constructor<?> constr1;
          assertNotNull(cut);
          try {
               constr1 = cut.getDeclaredConstructor(Comparable.class,Comparable.class);
               obj1=(ClassUnderTest<Integer>)constr1.newInstance(Integer.valueOf(102),Integer.valueOf(20));
               assertNotNull(obj1);
               print("The object of CUT class instantiated with Integer Type");
               // invoking methods on Object1
          assertEquals(minVal.invoke(obj1),20);
          //Object x = minVal.invoke(obj1);
          print("tested successfully the min of two integers passed");
          assertEquals(maxVal.invoke(obj1),102);
          // maxVal.invoke(obj2);
          //print();
          print("tested successfully the max of two integer values" );
          } catch (Exception e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
@Test public void cutStringTest(){
     assertNotNull(cut);
     Constructor<?> constr2;
          try {
               constr2 = cut.getDeclaredConstructor(Comparable.class,Comparable.class);
               obj2=(ClassUnderTest<String>)constr2.newInstance(String.valueOf(obj1.maxValue().toString()),obj2.minValue().toString());
               //obj2=(ClassUnderTest<String>) cut.newInstance();
               assertNotNull(obj2);
               //assertNotNull("obj1 is not null",obj1);
               //print(obj1.maxValue().toString());
               print("Object 2 instantiated as String type ");
               print("setting values on object2 of type string from values of obj1 of type Integer by using toSting()");
               setVal1.invoke(obj2, obj1.maxValue().toString());
               setVal2.invoke(obj2, obj1.minValue().toString());//obj2.setVal2(obj1.minValue()
               assertEquals(getVal1.invoke(obj2),maxVal.invoke(obj1).toString());
               assertEquals(getVal2.invoke(obj2),minVal.invoke(obj1).toString());
               print("validating the Assert Equals set from object 1 after conversion to String");
               print("MinValue for Object2 when Integer treated as String>>> "+minVal.invoke(obj2));
               print("MaxValue for Object2 when Integer treated as String>>> "+maxVal.invoke(obj2));
          } catch (Exception e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          //obj2.setVal1(obj1.maxValue()
     private static void print(String str){
          System.out.println(str);
     private String getMethodNames(Method[] methods) {
          StringBuffer sb= new StringBuffer();
          for(Method method: methods){
               sb.append(method.getName()+ " ");
          return sb.toString();
     private String getFieldNames(Field[] fields) {
          StringBuffer sb= new StringBuffer();
          for(Field field: fields){
               sb.append(field.getName()+ " ");
          return sb.toString();
//ClassUnderTest
public class ClassUnderTest <T extends Comparable<T>>{
     //Fields
     private T val1;
     private T val2;
     ClassUnderTest(){}
     public ClassUnderTest(T val1, T val2){
          this.val1=val1;
          this.val2=val2;
     * @return the val1
     public T getVal1() {
          return val1;
     * @param val1 the val1 to set
     public void setVal1(T val1) {
          this.val1 = val1;
     * @return the val2
     public T getVal2() {
          return val2;
     * @param val2 the val2 to set
     public void setVal2(T val2) {
          this.val2 = val2;
     public T maxValue(){
          T max=null;
          if(val1.compareTo(val2) >= 0){
               max= val1;
          }else {
               max= val2;
          return max;
     public T minValue(){
          T min=null;
          if(val1.compareTo(val2) < 0){
               min= val1;
          }else {
               min= val2;
          return min;
This code throws Null Pointer Exception if CutStringtest function(I think on calling obj1 in tht function) Please suggest!

Well, I can't help you specifically since I'm not into reflection too much, but here are some ideas:
* Either learn how to set breakpoints and single step through your code, or pepper your code with a lot more meaningful System.out.println() statements.
* Come up with simple test cases, pass them first, then progressively more complex test cases, until you test all possible situations. Try to get each test case to test only a single concept and not multiple concepts at the same time. If your code is broken on more than one concept, you will not be able to isolate each concept by itself to fix it without separating it.
* Consider refactoring your code so each sub-module accomplishes one task in isolation and verify that module can handle each possible situation that its asked to perform.
* The exception usually tells you what line in your code threw the exception. Look for a line in the exception printout that has the name of your package or class in it.

Help needed in Java Printing Service

I need to print an image using the new JPS API, but with specific requirements.
I managed to find out how to get the image printed from my HD onto the printer by using the example given in the JPS user guide. But I can't seem to find out how to achieve the most important requirement.
I need to be able to control the printing position as well as the printed size of the image. Can anyone help me with it? I can't seem to find proper documentation that is related to the topic.
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I tried using the MediaSize class by constructing a custom sized media. But when I compiled it, I kept getting a "cannot resolve symbol" error for MediaSize.
Then returning to the MediaSize documentation page, it said that it is not yet used to specify media. Does that mean I have to wait?
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PageFormat page = new PageFormat();
paper.setImageableArea(0,0,600,800);
page.setPaper(paper);
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Help needed with while loops please :)

I'm beginning to study java at School.
My assignment using while loops, to ask user to input 2 numbers.
I have to output all odd number between the two.
I have to output the sum of all even numbers between the two.
Output all the numbers and their squares between 1-10.
Output the squares of the odd numbers between the 2 numbers the user entered.
Output all uppercase letters.
If anyone can give me any help, I would appreciate it greatly.
Thank you.
Kelly.

It would help if you put aside your code, and wrote out some pseudo-code first so that you understand the steps you will need to take. for example
get input from user
set counter to first number entered
while counter less than/ equal to second number
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end while
output sum of evensthat block, when coded, will solve 3 of the problems, the other 2 will require separate loops
Good Luck

Help needed with 'while' loop please

Problem: When a non-integer is entered, the console displays "Enter a wager > java.util.InputMismatchException" intermitentlly.
Here is the source codes
===================
import java.util.Scanner;
public class Test {
     private static int bankBalance = 1000;
     public static void main(String []args) {
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      Ask user for a wager, which must not be greater than 'bankBalance' and
      must be a valid Integer. Continue asking until a valid wager is entered.
     private static int wager() {
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                    input = scanner.nextInt();
                    isValid = true;
               } catch(java.util.InputMismatchException im_exc) {
                    System.out.println(im_exc.toString());
          return input;
}

It would help if you put aside your code, and wrote out some pseudo-code first so that you understand the steps you will need to take. for example
get input from user
set counter to first number entered
while counter less than/ equal to second number
      check if number is even
           if even, add to even_sum
           else output counter, along with its square
      increment counter by one
end while
output sum of evensthat block, when coded, will solve 3 of the problems, the other 2 will require separate loops
Good Luck

Help needed on java Logger, please...........

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