Best practice for Null check in Java
if(test ! = null)

if(null != test)

// no compiler complaint at all for C/C++
// while in Java, this is illegal.
if(a = 2) {
}
// this is illegal in C/C++
// and thus become best practice, from C/C++ which is not applicable to Java at all.
if(2 = a) {
}

if("bla".equals(test))

if(test.equals("bla"))