## Mar 8, 2014

Let’s say we have number 1 to 100 in a list we will see how to perform different operations on this List in Java and Scala.

Add numbers 1 to 100 in a list
 Java Way of doing it Scala way of doing it public static void main(String[] args) {        List list = new ArrayList<>();        for(int i=0;i<=100;i++){               list.add(i);        } } val numbers = (1 to 100).toList

Get the sum of numbers
 Java Way of doing it Scala way of doing it int sum = 0; for (Integer num : list) {        sum+=num; } System.out.println(sum); println(numbers.foldLeft(0)((x,y)=>(x+y)))

Get the sum of even numbers
 Java Way of doing it Scala way of doing it int sum = 0; for (Integer num : list) {        if(num%2==0){               sum+=num;        } } System.out.println(sum); println(numbers.filter(_%2==0)              .foldLeft(0)((x,y)=>(x+y)))

Get the sum of odd numbers that are greater than 15
 Java Way of doing it Scala way of doing it int sum = 0; for (Integer num : list) {        if(num%2==1 && num>15){               sum+=num;        } } System.out.println(sum); println(numbers.filter(x=>(x%2==1 && x>15))              .foldLeft(0)((x,y)=>(x+y)))

From above examples we can see that by passing function to a list we can reduce the line of code that we need to write. This also have an advantage when code is running in multithreaded environment. I will keep adding similar examples for comparing Java and Scala in this tutorial.