What does the return keyword do in a void method in Java

Question

I m looking at a path finding tutorial and I noticed a return statement inside a void method  class PathTest  line 126    if   x  lt  0      y  lt  0      x  gt   map getWidthInTiles        y  gt   map getHeightInTiles           return      I m a novice at Java  Can anyone tell me why it s there  As far as I knew  return inside a void method isn t allowed

User · Answer

It exits the function and returns nothing   Something like return 1  would be incorrect since it returns integer 1

User · Answer

The Java language specification says you can have return with no expression if your method returns void

User · Answer

The keyword simply pops a frame from the call stack returning the control to the line following the function call

User · Answer

It just exits the method at that point  Once return is executed  the rest of the code won t be executed   eg   public void test int n        if  n    1            return             else if  n    2            doStuff            return            doOtherStuff        Note that the compiler is smart enough to tell you some code cannot be reached   if  n    3        return      youWillGetAnError      compiler error here

User · Answer

See this example  you want to add to the list conditionally  Without the word  return   all ifs will be executed and add to the ArrayList        Arraylist lt String gt  list    new ArrayList lt  gt          public void addingToTheList          if isSunday              list add  Pray today           return             if isMonday              list add  Work today          return             if isTuesday              list add  Tr today           return

User · Answer

You can have return in a void method  you just can t return any value  as in return 5    that s why they call it a void method  Some people always explicitly end void methods with a return statement  but it s not mandatory   It can be used to leave a function early  though   void someFunct int arg        if  arg    0                  Leave because this is a bad value         return              Otherwise  do something

User · Answer

It functions the same as a return for function with a specified parameter  except it returns nothing  as there is nothing to return and control is passed back to the calling method

[java] What does the return keyword do in a void method in Java?

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