Is there a way of randomising which if statement runs first,second,third,fourth and so on in Java?

Question

If I have a bunch of if statements:

if(){}
if(){}
if(){}
if(){} etc....

Is there a way that these if statements can be run randomly instead of top to bottom? For example, if() statement 4 may run first and if() statement 2 may run last and other possibilities.

Why would you need this? There's probably a better way to do what you're trying to do. — Carcigenicate, Oct 25 '18 at 17:05
What is the purpose of that? Sharing the context of the problem you're trying to solve will surely attract more useful answers. — ernest_k, Oct 25 '18 at 17:05
Why you want it to randomly execute, If you have a specific problem please share it. — Hidayat Ullah, Oct 25 '18 at 17:06
To sort elaborate on the three comments above, yes there are ways, but those ways often depend on the actual problem context. More information would help us help you better. — markspace, Oct 25 '18 at 17:06
Have you thought about it? There are n!=24 combinations of which runs 1st, 2nd,.... — forpas, Oct 25 '18 at 17:08
As a sequence of statements, no. As an indexable collection of *tasks* -- yes. — Andy Thomas, Oct 25 '18 at 17:20

score 1 · Accepted Answer · edited Oct 26 '18 at 12:35

Shuffle an array of 0...n integers. Each number represents one of your if-statements.

Random shuffling of an array

int[] indices = shuffleRandomArray(0, 10);
for(int idx=0; idx<indicies.length; idx++) {
  int val = indicies[idx];
  if(val==0) if(){..};
  else if(val==1) if(){..};
  else if(val==2) if(){..};
  else if(val==3) if(){..};
  else if(val==4) if(){..};
  ...
}

In Java 8 you could use function pointers https://www.baeldung.com/java-8-double-colon-operator

Is there a way of randomising which if statement runs first,second,third,fourth and so on in Java?

1 Answers1