Compile Error: Could Not Open

[BiCure]

I am trying to run my first program on a new laptop as my old one crashed. I got this error and not sure what it means: could not open 'C:\Program Files\Java\jre7\lib\amd64\jdm.cfg'

[BiCure]

I am trying to compile a package example from a textbook.

Here is the code:

// A simple package
package MyPack;

class Balance {
String name;
double bal;

Balance(String n, double b) {
name = n;
bal = b;
}

void show() {
if (bal<0)
System.out.print("--->");
System.out.println(name + " : $" + bal);
}
}

class AccountBalance {
public static void main(String args[]) {
Balance current[] = new Balance[3];

current[0] = new Balance("K. J. Fielding", 123.23);
current[1] = new Balance("Will Tell", 157.02);
current[2] = new Balance("Tom Jackson", -12.33);

for(int i = 0; i < 3; i++)
current[i].show();
}
}

The name of my file is AccountBalance.java and the directory is C:\Java\MyPack. I have my cmd directory as C:\Java and typed in java MyPack.AccountBalance and it gives me that error.

[cselic]

@BiCure:
Are you sure that here 'C:\Program Files\Java\jre7\lib\amd64\jdm.cfg' is 'jdm.cfg', because I think that there should be 'jvm.cfg' file?

[BiCure]

You are right, the error is stating jvm not jdm, sorry for the typo.

[cselic]

Is this error was in Eclipse IDE, or in Netbeans, or in something else?

Java allows several JRE/JDK to be installed at the same time, and IDE allows you to select the one to use with your project in Preferences.

[BiCure]

I am just using notepad.

[BiCure]

And trying to run in command prompt.

[cselic]

If you have Windows OS you should try something like this:

My Computer -> clickRightButton -> Properties -> Advanced -> Environment Variables -> (system Variables) click on Path -> edit Path and in Path you should write this:

;C:\Program Files\Java\jre7\bin;C:\Program Files\Java\jre7\lib

and you should delete previous values in that Path that is similar to this values.

[BiCure]

My program folder MyPack is located in bin. Is this correct? I have my file AccountBalance.java in MyPack in the bin folder. Then when I open cmd and try to compile I get the location to the bin folder then type javac MyPack.AccountBalance.java and get an error saying file not found.

[BiCure]

C:\Program Files\Java\JDK\bin> javac MyPack.AccountBalance.java is how it looks in cmd

It says javac: file not found: MyPack.AcccountBalance.java

[BiCure]

I have gotten my program to run but the purpose of the exercise was to learn how packages work. I had to delete the package part of it to get it to run. Can you help me with how packages work? I thought I understood from my textbook but I get an error that way and can only run it when it is not part of a package.

[BiCure]

Using the program above, it says put AccountBalance.java in a directory called MyPack. I made a folder in bin called MyPack and saved AccountBalance.java inside

It then says, compile the file and make sure the resulting .class is also in the MyPack file. Then try executing the AccountBalance class using the following command line --> java MyPack.AccountBalance. I have C:\Program Files\Java\JDK\bin as my directory. When I have the package = MyPack; included in my program and type javac MyPack.AccountBalance.Java it will come up with an error: file not found myPack.AccountBalance.java

[cselic]

^ Do not use java MyPack.AccountBalance, but use java MyPack/AccountBalance.

Do not use javac MyPack.AccountBalance.java, but use java MyPack/AccountBalance.java

I think that it should work.

[BiCure]

It worked to compile, but when running I got this error. Too long to type, took screen capture.

[BiCure]

With LoL in the background haha, didn't feel like edit.

[cselic]

^Please copy + paste your error on this thread.

[BiCure]

Not sure how to copy paste out of cmd.

[BiCure]

It is in that screen capture.

[Tolls]

1. Do not stick your code in the JDK folder.
You should be working in your own directory, probably in your user docs or similar.
Then you need to go through the Java tutorials at Oracle to try and get them compiling, probably the basics ones.

[BiCure]

Well thanks for the link to get my folder straight that was easy. Also, I realized my error. After figuring out the path problems in my first endeavor and deleting the package name to get it to compile in the first place, I realized I named my package myPack instead of MyPack when I put it back in. Dumb of me. Thanks cselic and Tolls!