Enthuware

Regarding this question: the answer being a compilation error on line 2.

public class TestClass
{
public static void main(){ new TestClass().sayHello(); } //1
public static void sayHello(){ System.out.println("Static Hello World"); } //2
public void sayHello() { System.out.println("Hello World "); } //3
}

Why is the error on line 2 rather than on line 3? I see line 2 as correct while line 3 repeats the method signature resulting in the error. Is there a rule about where errors are indicated?

If I compile this code on the command line I get the following response:

sayHello() is already defined in .....TestClass() public void sayHello() {...} //3

Thanks

Hi,
The error is indeed at line 3 and that is the correct option as well.

C:\temp>javac TestClass.java
TestClass.java:5: sayHello() is already defined in TestClass
public void sayHello() { System.out.println("Hello World "); } //3
^
1 error

HTH,
Paul.

for(final Object o2 :c){ }
final cannot be referred more than once but we are passing collection and now it will refer to all the objects of collection one by one.

The scope of o2 is within one iteration of the for loop. So for the next iteration, it is a new variable. Thus, no problem with defining it again as final.