javaloopslambdajava-stream

Make a stream to generate the multiples of three


I'm trying to generate a stream of integers, so I made a static method that returns a Stream.

Here is the method:

public static Stream<Integer> multipleOf3(){
    return Stream.iterate(1, x -> 3*x).limit(10);
}

However this method don't return me the mutitples of three but the powers of three.

I call the method like this:

multipleDe3().forEach(System.out::println);

and I have this result:

1
3
9
27
81
243
729
2187
6561
19683

I think the iterate function uses the previous result, the seeds = 1, so x = 1 and then:

3*1 = 3, 
3*3 = 9, 
3*9 = 27, etc... 

If anyone has an idea to calculate the multiple without using the previous result tell me please.


Solution

  • public static Stream<Integer> multipleOf3(){
        return Stream.iterate(0, x -> 3+x).skip(1).limit(10);
    }
    
    public static void main(String[] args) {
        multipleOf3().forEach(System.out::println);
    }
    

    Output : 3 6 9 12 15 18 21 24 27 30