Best way to check for null values in Java?

Method 4 is best.

if(foo != null && foo.bar()) {
   someStuff();
}

will use short-circuit evaluation, meaning it ends if the first condition of a logical AND is false.

The last and the best one. i.e LOGICAL AND

  if (foo != null && foo.bar()) {
    etc...
}

Because in logical &&

it is not necessary to know what the right hand side is, the result must be false

Prefer to read :Java logical operator short-circuiting

Since java 8 you can use Objects.nonNull(Object obj)

if(nonNull(foo)){ 
//
}

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