How to use null in switch

Question

Integer i = ...

switch (i){
    case null:
        doSomething0();
        break;    
    }

In the code above I cant use null in switch case state

Answer 1

Just consider how the SWITCH might work,

• in case of primitives we know it can fail with NPE for auto-boxing
• but for String or enum, it might be invoking equals method, which obviously needs a LHS value on which equals is being invoked. So, given no method can be invoked on a null, switch cant handle null.