pass reference variable in method

[Anjali Vaidya]

I have written this code and am getting 4 compilation errors. But am still not able to correct it. Please help

public class MyObject
{
public MyObject(String s)
{
	System.out.println("in constructor " +s);
}

 static void myTest(MyObject obj)
    {
	System.out.println("in myTest " +obj);
    }
  public static void main(String args[])
    {
	MyObject obj1=new MyObject("Hello");
        myTest(obj1);

	MyObject obj2=new MyObject("World");
        myTest(obj2);

    }

}

and the output on command prompt was:
C:\Users\Anjali\Desktop\PracJava\Ref>javac MyObject.java
MyObject.java:9: cannot find symbol
symbol : constructor MyObject(java.lang.String)
location: class MyObject
MyObject obj1=new MyObject("Hello");
^
MyObject.java:10: non-static method myTest(MyObject) cannot be referenced from a
static context
myTest(obj1);
^
MyObject.java:12: cannot find symbol
symbol : constructor MyObject(java.lang.String)
location: class MyObject
MyObject obj2=new MyObject("World");
^
MyObject.java:13: non-static method myTest(MyObject) cannot be referenced from a
static context
myTest(obj2);
^
4 errors

[Rob Spoor]

I can compile the code you provided without any errors.

[Anjali Vaidya]

I checked it again. In a new cmd window again compilation error with the same 4 errors
What is the problem? other programs are executing properly

[Stephan van Hulst]

Are you sure you aren't editing a copy of the file you're trying to compile?

Maybe you accidentally renamed the file or saved it to another folder.

[fred rosenberger]

agreed. I did a straight cut-n-paste and it compiled and ran:

C:\slop>javac MyObject.java

C:\slop>java MyObject
in constructor Hello
in myTest MyObject@3e25a5
in constructor World
in myTest MyObject@19821f

C:\slop>

Try saving it under a different file name like MyObject2.java (you'll have to change your class name in the file as well), and make sure it's saving it where you think it is.

[Anjali Vaidya]

is it because am running in a cmd. Is it the reason why it's giving errors because it interprets line by line?

[Stephan van Hulst]

No, cmd should be fine. Have you already checked that the filenames and -paths in the command prompt and in your editor are the same?

[Anjali Vaidya]

I now renamed all the MyObject to MyObject2 and it worked perfectly fine. But why did this happen? Just asking so that i know where i went wrong if this happens again

[Stephan van Hulst]

This is just a guess, but when you were editing the file, you might have used Save As... instead of Save when you tried to save the file, and accidentally renamed the file. When you continue editing the file, the changes won't be visible to the compiler because you're telling it to compile the old copy of your file.

It's likely just a fluke. I wouldn't worry about it, I don't think it will happen again any time soon.

[fred rosenberger]

Stephan van Hulst wrote:This is just a guess, but when you were editing the file, you might have used Save As... instead of Save when you tried to save the file, and accidentally renamed the file.

Or saved it to a different directory.

If it happens again, look at the time stamp on the file in your cmd window when you do a dir. Then edit and save the file again (you don't have to change much - just put in then delete a space so the file has "changed" then save it). Then do another dir and see if the timestamp changed. If not, they you're saving it somewhere else...

[Anjali Vaidya]

thanks a lot for the advice.