Travis Rademacher

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since Jul 05, 2010
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Recent posts by Travis Rademacher

Woops, yes those are quotations. Okay I think it is just for spacing it out because I haven't gotten far enough into my book for debugging yet.
8 years ago
Often when reading my java book and when their code wants to display an output, the statement will look something like this:

System.out.println(x + "" + y +" ") ;

I just don't get why those parenthesis are there. If I am already asking the JVM to print the following output on the command line, why do I need to act as if it should be printing more. Would it work if the code looked something like this:

System.out.println(x + y ) ;

What is the difference between the two of these?
8 years ago
Thank you christophe. My code works fine now
8 years ago
What I did was:

java -cp <c:\java> MyFirstApp

It told me access is denied. I am system administrator so this confuses me.
8 years ago
Thank you so much. I have another problem. I compiled the source file fine. Now I tried to run the class file. In command prompt, I typed: java c:\java\myfirstapp.class

It gave me a message:
Exception in the thread "main" java.lang.NoClassDefFoundError: c:\java\myfirstapp/class

Caused by: Java.lang.ClassNotFoundException: C:\java\myfirstapp.class
at:

And then a bunch of stuff


This is my source file:

public class MyFirstApp {

public static void main (String[] args) {
System.out.print("JAVA!!!"); }
}


Is it an error in my programming or what?
8 years ago
I wrote down CLASSPATH and PATH in my system variables already.
The CLASSPATH's value is %classpath%;. And the PATH's value is %path%;C:\Program Files\Java\jdk1.6.0_20\bin

I'm not sure if there are any errors in that above, so I just included it.
After this, created my source file, saved it in C:\Program Files\Java\jdk1.6.0_20\bin as MyFirstApp.java. So I open command prompt, enter: javac MyFirstApp.java

This is what comes up:

javac: file not found: MyFirstApp.java
Usage: javac <options> <source files>
use -help for a list of possible options

Help?


8 years ago