Classes & classes

Hey!
I'm an absolute beginner at java and I've encountered my first problem. I've made a class with a couple of methods. My learning book told me to make a testclass, to test the methods of the class i've made earlier. So i've made the test class, but for some reason I get a error when running the test class. No such method. But the classes are located in the same director!
please help
regards

Without your code it's hard to tell - no such method could mean you have your method signature wrong or you didn't get your main method coded correctly or possibly something else - post the test class, and (if it's not too large) the class your testing and the command you used to run your test class. Please place [code][/code] tags around your code.
Good Luck
Lee

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Error in using Class class

This is probably to do with my enviroment having a problem but when I try to compilee ShowMethods.java from Chapter 10 of thinking in Jave (code below after error messages) I get the following error:-
ShowMethods.java:23: cannot access Class
bad class file: .\Class.java
file does not contain class Class
Please remove or make sure it appears in the correct subdirectory of the classpa
th.
      Class c = Class.forName(args[0]);
      ^
1 errorAny ideas?
Ben
//: c10:ShowMethods.java
// Using reflection to show all the methods of a class,
// even if the methods are defined in the base class.
// {Args: ShowMethods}
import java.lang.reflect.*;
import java.util.regex.*;
public class ShowMethods {
private static final String usage =
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    "ShowMethods qualified.class.name word\n" +
    "To search for methods involving 'word'";
private static Pattern p = Pattern.compile("\\w+\\.");
public static void main(String[] args) {
    if(args.length < 1) {
      System.out.println(usage);
      System.exit(0);
    int lines = 0;
    try {
      Class c = Class.forName(args[0]);
      Method[] m = c.getMethods();
      Constructor[] ctor = c.getConstructors();
      if(args.length == 1) {
        for(int i = 0; i < m.length; i++)
          System.out.println(
            p.matcher(m.toString()).replaceAll(""));
for(int i = 0; i < ctor.length; i++)
System.out.println(
p.matcher(ctor[i].toString()).replaceAll(""));
lines = m.length + ctor.length;
} else {
for(int i = 0; i < m.length; i++)
if(m[i].toString().indexOf(args[1]) != -1) {
System.out.println(
p.matcher(m[i].toString()).replaceAll(""));
lines++;
for(int i = 0; i < ctor.length; i++)
if(ctor[i].toString().indexOf(args[1]) != -1) {
System.out.println(p.matcher(
ctor[i].toString()).replaceAll(""));
lines++;
} catch(ClassNotFoundException e) {
System.out.println("No such class: " + e);
} ///:~

This is probably to do with my enviroment having a
problem but when I try to compilee ShowMethods.java
from Chapter 10 of thinking in Jave (code below after
error messages) I get the following error:-==SNIP==
This is during compile time, correct?
It sounds like you might have a CLASSPATH error... (a search of the Forums should indicate at least 120000 potential posts involving this issue, since last tuesday ;-))
It does seem strange--that is the code actually posted from the file "ShowMethods.java" that you have keyed into a notepad editor of some sort?
What command are you using to compile?

What is the use of class Class

What is the use of class Class?

Sample use: if you are specifying the name of a class in a config file, you can use Class method newInstance to instantiate it.:
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Exception in Class class native method

Hi Guys,
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java.lang.NoSuchMethodException
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     at java.util.Arrays.mergeSort(Arrays.java:1189)
     at java.util.Arrays.mergeSort(Arrays.java:1189)
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     at java.util.Arrays.mergeSort(Arrays.java:1189)
     at java.util.Arrays.mergeSort(Arrays.java:1189)
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Thanx,
Chandan.

Class.getMethod() throws that exception if the method that is being searched for does not exist.
And VCComparator.compare() used Class.getMethod().
So something is wrong in VCComparator.compare().

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Dear,
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Procedure
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what can be the problem?
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Hi
Check the following threads it may help you
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PR Release : Error in Classification
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Hi All,
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Hi Gupta,
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by
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Load: class .class not found.
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blah
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yeah its kinda strange it happens for me every time consistently when a new class file is created with a compile the first time an applet is run it will give then class .class exception that i cant find information on. If there is no class in the folder such as i delete it and then run the applet the class "name".class a cures witch i see a few times on the internet but the first run failing is strange everything is in the right place and the class is in the right folder just the first time it is accessed it will fail but every time after it will work until a new compile and a new class is created
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Hi!
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Thank you for all your help
- Mari Virik

DATA : LT_CHARACTERISTICS TYPE BAPI1003_CHARACT_R OCCURS 0.
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EXPORTING
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LANGUISO                   =
LANGUINT                   = SY-LANGU
KEYDATE                    = SY-DATUM
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CLASSDOCUMENT              =
CLASSADDITIONAL            =
CLASSSTANDARD              =
RETURN                     =
TABLES
CLASSDESCRIPTIONS          =
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I was searching in the java docs and in the source code of Java and found a syntaxis that I don't know what mean. This:
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Tanks

See the generics tutorial:
http://java.sun.com/j2se/1.5/pdf/generics-tutorial.pdf

Error "You may only define methods within "CLASS class IMPLEMENTATION"

We have code in LMIGOSMC so that the vendor batch number appears in the MIGO transaction for certain movement types. We have created another, custom movement type in which this functionality should be available so I need to add it to LMIGOSMC. When I go in and try to make the modification I am getting the following error:
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Hi,
You are not doing anything wrong with regard to the syntax error you are getting. During the syntax check of include program LMIGOSMC, the system is not aware of the CLASS... ENDCLASS statements within the program LMIGOSM4. Try the syntax check at the LMIGOSM4 program level (or even better, at the SAPLMIGO level) and you will see that the error is not given.
Regards,
Jamie

Java .class files - Moving the Main Class .class file to a new location

Novice question....so much so that I hope it's even coherent...
In a Java program which references many associated .class files (e.g. bicycleMain.class, bicycleSub1.class, bicycleSub2.class, etc....), do the associated .class files always have to be located in the same directory as the Main .class file?
What I'm getting at is - If I've developed an application consisting of several .class files on my own Windows PC and I want to put the compiled application out on our Windows File Server so that anyone can execute my application, how would I go about doing this?
Say I put the compiled .class files in H:\PROJECTS\JAVA\COMPILED\, will other people be able to execute the application from their PCs by simply issuing the command line:
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Interesting...so are you saying the command line might look something like this:
java -classpath h:\projects\java\compiled bicycleMain
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Can applet load own security class, class loader

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i have done throw policy file entry to allow applet to write file in client machine.
i feel this extra burden novice user...
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plz..

An applet should never be allowed to install its own security manager. That is why it is burdensome.

Class class

I have a question about the Class's forName method. How do you make it so that it searches the current directory, if the parameter entered is not one of the java libraries?
i.e. Class c = Class.forname("Circle");
Circle is the class I made. It is in the same directory as the class that I am making using the forname method and the exception I get is a ClassNotFoundException.
Thanks, Hector

Try putting "." (the current directory) in your CLASSPATH. I assume you are using the default ("no") package for your classes.

Runnable JAR, Main-Class, Class-Path and INDEX.LST

Some funky finding, don't know whether this is a bug or a feature...
I'm using
java version "1.4.2_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_06-b03)
Java HotSpot(TM) Client VM (build 1.4.2_06-b03, mixed mode)
I observed follwing weired behaviour:
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Manifest-Version: 1.0
Ant-Version: Apache Ant 1.6.2
Created-By: 1.4.2_06-b03 (Sun Microsystems Inc.)
Main-Class: main.Main
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Cheers,
Peter

Does anyone know if having a Class-Path in the manifest would ignore the system environment variable CLASSPATH?
I'm seeing this in my set-up. I have an external jar file that can be seen if copied to <jre dir>/lib/ext, but when it's in another dir with the CLASSPATH pointing to it can't be found.
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Classes & classes

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