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Array To Stream in Java
With Java 8, Arrays class has a stream() methods to generate a Stream using the passed array as its source.
Description
The java.util.Arrays.stream() method returns a sequential Stream with the specified array as its source. −
Arrays.stream(array)
Declaration
Following is the declaration for java.util.Arrays.stream() method
public static <T> Stream<T> stream(T[] array)
Type Parameter
T − This is the type of the array elements.
Parameter
array − This is the source array to be used.
Return Value
This method returns a stream for the array.
Example
The following example shows the usage of java.util.Arrays.stream() method.
import java.util.Arrays;
public class Tester {
public static void main(String args[]) {
int data[] = { 1, 2, 3, 4, 5 };
//iterative way to compute sum and average of an array
int sum = 0;
for(int i = 0; i< data.length; i++) {
sum+= data[i];
}
System.out.println("Sum : " + sum);
System.out.println("Average : " + sum/data.length);
//declarative way to compute sum and average of an array
sum = Arrays.stream(data).sum();
System.out.println("Sum : " + sum);
System.out.println("Average : " + sum/data.length);
}
}Output
Compile and Run the file to verify the result.
Sum : 15 Average : 3 Sum : 15 Average : 3
Updated on: 18-Jun-2020
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