Java 8 filter based on a boolean -


i want able apply filter based on boolean passed in. 

public static list<integer> multiplynumbers(list<integer> input, boolean ignoreeven){      return input.stream()     .filter(number -> !(number%2==0))     .map(number -> number*2)     .collect(collectors.tolist()); }

i want make filter step based on ignoreeven flag. if true, ignore numbers. how go doing it? doing avoid code duplication

sounds straightforward or condition me.

.filter(number -> !ignoreeven || (number % 2 != 0))

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