Missing import statment

[garima jain]

Source: Whizlabs

   
class WriterTest{
public static void main(String args[]) throws IOException
{
Writer w = new BufferedWriter(new FileWriter("bb.txt"));
w.write();
w.close();
}
}
 

What is the result of compiling and running this code assuming that the file bb.txt does not exist.
I thought the answer to this question would be Compilation error as import statement is missing and there is no numbering given on the left hand side. However, Whizlabs does not say this.
Please suggest. Thanks.

[Ankit Garg]

The real exam codes will always have line numbers. And if the line numbers don't start with 1, then you don't have to worry about import statements...

[garima jain]

thanks Ankit

[Ganeshkumar cheekati]

if i wont find import statement or line-1

then can i put answer as compilation fails...?

[Ankit Garg]

If the line numbers are not beginning from 1, then you can assume that all the required import statements are there. But if the line numbers start from 1, then you cannot assume that there are required import statements. So if the line number start from 5, and there is use of File class, then you can assume that there is an import java.io.*; statement on the lines not shown. But if the line numbers start from 1, and there is no import java.io.* or java.io.File, and the code uses the File class, then it would be a compilation error...

[Pandey Gautam]

Hi Ankit,
I read somewhere that import.lang is implicit import for any java file.
Is it correct?

[Ankit Garg]

yes. You can use classes in java.lang package without importing any package. Like the Object and System classes are in the java.lang package along with the wrapper classes, String class and a lot of other classes which you can use directly...