Compiler Error

[Swapna latha]

package test1;
public class Test1
{
    static int x=42;
}

package test2;
public class Test21 extends test1.Test1
{
    public static void main(String args[])
    {
        System.out.println("x="+x);
    }
}

D:\surya>javac Test21.java
Test21.java:6: 'class' or 'interface' expected
package test2;
^
1 error

Why i am getting this error ? I am not understanding this.

Thanks & Regards
Kori Swapna Latha

[Edit - fixed code tags and formatting - MB]

[Korhan Rankin]

Hey Swapna,

you have a scope/compile problem, x is not accessible for Test21.

public class Test1
{
public static int x=42;
}

better:
public class Test1
{
protected static int x=42;
}

fixes it.

public = everyone can access it.
protected = only class hierarchy can access it. reduce visibilty as much as possible.

I'm not sure if that fixes your actual compile problem. Give it a try.. you should get eclipse, much easier to learn java.

cheers

[Winston Gutkowski]

Swapna latha wrote:Test21.java:6: 'class' or 'interface' expected
package test2;
^
1 error

Why i am getting this error ? I am not understanding this.

You can only have one package declaration in a .java file, because a class can only belong to one package; and it must be the first statement other than comments.

Also: you can only have one public class in a source file; and it must have the same name as the file without the '.java'.

Winston

[Korhan Rankin]

Winston Gutkowski wrote:

Swapna latha wrote:Test21.java:6: 'class' or 'interface' expected
package test2;
^
1 error

Why i am getting this error ? I am not understanding this.

You can only have one package declaration in a .java file, because a class can only belong to one package; and it must be the first statement other than comments.

Also: you can only have one public class in a source file; and it must have the same name as the file without the '.java'.

Winston

I acutally didn't thought that the mentioned code is in one file.. if so Winston is right of course.

[Winston Gutkowski]

Korhan Rankin wrote:you should get eclipse, much easier to learn java.

I disagree. Much better that Swapna make these mistakes now, and learn to use Java properly from the command line. The time for an IDE is when you start building projects for real, not while you're learning.

Winston

[Korhan Rankin]

Winston Gutkowski wrote:

Korhan Rankin wrote:you should get eclipse, much easier to learn java.

I disagree. Much better that Swapna make these mistakes now, and learn to use Java properly from the command line. The time for an IDE is when you start building projects for real, not while you're learning.

Winston

I agree with your point, learning Java properly is better with starting from command line.