Difference between null!=variable and variable!=null

Question

What is the difference between null!=variable and variable!=null Which method is perfect to use?

if ((null != value1) || (null != value2) || (null != value3)) {
            .......
            .......
            .......
}

or

if ((value1 != null) || (value2 != null) || (value3 != null)) {
                .......
                .......
                .......
}

Please suggest the best one and the logical change between these?

Answer 1

No difference.

But people quite often write "abc".equals(foo), instead of foo.equals("abc"), to avoid null point exception.

Answer 2

Nothing is different.

I prefer value != null for purely readability reasons.