What is the ampersand-peer operator used in Java?

Question

Does Java have the &= operator? I see this code:

 boolean allReady = true; for(Entry<String,Boolean> ace : factory.readyAces.entrySet()) { allReady &= ace.getValue(); 

What is &= ?

Answer 1

This is the same as:

 allReady = allReady & ace.getValue(); 

It is a little wise and. This means that you always evaluate both sides, then accept the “logical” and “(the result is valid only if both sides are true).

Answer 2

this is a shortcut for bitwise and

 allReady = allReady & ace.getValue(); 

Answer 3

This is a bitwise AND assignment operator. Equivalent:

 allReady = allReady & ace.getValue();