Pfthb

I have a code that compares data but that data contains null values not blank spaces ("") they may/may not be same i guess but I tried comparing repetitive NULL values like

 for(int i=0;i<length;i++)
 

I could have used .contains but that wont work because it is in the loop.
None of the method makes it print the output as No Data I have tried using try catch as well because in order to make sure if theres any error found and was correct at the same time isEmpty() and .equals(null) were somewhere or the other throwing the exception as NULL but even after removing and simply using ==Null realizing the fact that data is itself null and comparing like null.equals wont work but in case of == I found that the error exception got changed to value as 1 thereafter the same error and I wasnt able to recognize this.
Its the sample here which I am showing I cant post the exact but the above makes quite clear. Is there any other way I could treat these NULL values.

Note : I dont want to use a loop to iterate data as well and each time comparing NULL values because already theres an outer loop for large set of values dont go by the sample code.

Restoring windows to factory settings will restore windows (as its name suggests); it won't spoil anything.

In this

 String data=sample_data.getData();// contains about 1000 null rows
 if(data.equals(null) || data.equals("") || data== null 

you are apparently concerned that data may be null.

If indeed it is null, then the very first clause in your if statement will throw a null pointer exception... because you can't call the equals method on a null reference.

You want

 if (data == null || data.isEmpty())

and that covers all the cases of nothing, except possibly the case where data is "some number of space characters", but I'll leave that for you.