Enthuware Mocks question.

[Kancharla Madhu]

package util.log4j;

class Logger {

    public void log(String msg) {
	System.out.println(msg);
    }
}

package util;

public class TestClass {

    public static void main(String[] args) {
	
	Logger logger = new Logger();
	logger.log("hello");

    }

}

What changes, when made independently, will enable the code to compile and run?

Correct Answer : Replace Logger logger = new Logger(); with: util.log4j.Logger logger = new util.log4j.Logger();

Looks like it is wrong as Logger.java was defined in different package with default scope. So,the statement will not compile.

[K. Tsang]

Well the "new Logger()" is ambiguous. There is no Logger class in java.lang package since the code has no import statements. The Java API has however a java.util.logging.Logger but the constructor is protected.

Therefore, you need to explicitly use the fully qualified name for Logger.

[Kancharla Madhu]

If we define Logger.java as public then code will compile without any problem.

[Paul Anilprem]

You have not quoted the code exactly as given in the question. The Logger class is defined as public but you've omitted coderanch.
-Paul.

[Kancharla Madhu]

public modifier was not there in the actual question itself,If you want me send the snapshot of the question I can.

[Paul Anilprem]

Kancharla Madhu wrote:public modifier was not there in the actual question itself,If you want me send the snapshot of the question I can.

I see that this question ( QID: enthuware.ocajp.i.v7.2.915 ) was last updated on 09/11/2012 and it does have the modifier (at least since then). So you seem to be using an older version of the question bank. Please update your question bank.

HTH,
Paul.

[K. Tsang]

Kancharla Madhu wrote:If we define Logger.java as public then code will compile without any problem.

Well even if the class is declared coderanch, the Logger class is in different package from the TestClass. So it remains ambiguous.

A class can access other classes in the same package only. Any sub-packages will need imports.

[Paul Anilprem]

K. Tsang wrote:

Kancharla Madhu wrote:If we define Logger.java as public then code will compile without any problem.

Well even if the class is declared coderanch, the Logger class is in different package from the TestClass. So it remains ambiguous.

A class can access other classes in the same package only. Any sub-packages will need imports.

No import is required if you use the fully qualified class name as is used in the correct option.

HTH,
Paul.