java code if and return

I have seen code that looks like this

public void static fn(boolean someCondition){
       if(someCondition) {
         return error();
       }
       return success();
}

Although there is nothing wrong in this, conventions suggest that this be written in a readable way like

return someCondition ? error() : success();

but lets say we have some more statements like this

public void static fn(boolean someCondition){
       if(someCondition) {
         statement1;
         statement2;
         return error();
       }
       statement2;
       statement4;
       return success();
}

I would consider it will be more readable to put it as

public void static fn(boolean someCondition){
       if(someCondition) {
         statement1;
         statement2;
         return error();
       }else{
         statement2;
         statement4;
         return success();
       }
}