filtering negative values

Question

How to filter negative values from a set of arrays? I just want to get the positive values, is there any specific class to do it in Java? Is the Math.max in Java is the correct class to do it?

Answer 1

Java 8+

You can use Stream and lambda expressions:

Integer[] numbers = {1, -5, 3, 2, -4, 7, 8};

Integer[] positives = Arrays.asList(numbers)
                            .stream()
                            .filter(i -> i > 0)        // >= to include 0
                            .toArray(Integer[]::new);

System.out.println(Arrays.asList(positives));

Output:

[1, 3, 2, 7, 8]

Answer 2

Is the Math.max in Java is the correct class to do it?

Math is class and Math.max() is static method ,

You just simply need to check each element against the condition

if(number < 0 ){
   //negative
}