Java 8 Stream came up with methods: count(), max(), min(), findAny(), findFirst(). In this post, we will learn how to use these methods.
Let’s discuss first what these methods are:
count() – This method returns the count of elements of a stream.
max() – This method returns the maximum element of a stream.
min() – This method returns the minimum element of a stream.
findAny() – This method returns an java.util.Optional describing some element of the stream, or an empty java.util.Optional if the stream is empty.
findFirst() – This method returns an java.util.Optionaldescribing the first element of this stream, or an empty java.util.Optional if the stream is empty.
Find Count, Max, Min, findAny & findFirst using Java 8 Streams methods...!!! Share on X
Let’s Begin,
Example:
import java.util.ArrayList;
import java.util.List;
public class Java8_Stream_Example {
public static void main(String[] args) {
List <Integer> number = new ArrayList <> ();
number.add(30);
number.add(20);
number.add(10);
number.add(40);
// Count the numbers
long count = number.stream()
.count();
System.out.println("Total Count: " + count);
// Max Number
Integer maxNumber = number.stream()
.max((x, y) -> x - y)
.get();
System.out.println("Max Number: " + maxNumber);
// Min Number
Integer minNumber = number.stream()
.min((x, y) -> x - y)
.get();
System.out.println("Min Number: " + minNumber);
// Find Any Number
Integer findAnyNumber = number.stream()
.findAny()
.get();
System.out.println("FindAny Number: " + findAnyNumber);
// Find First number
Integer findFirstNumber = number.stream()
.findFirst()
.get();
System.out.println("FindFirst Number: " + findFirstNumber);
}
}
Output:
Total Count: 4
Max Number: 40
Min Number: 10
FindAny Number: 30
FindFirst Number: 30
Find Count, Max, Min, findAny & findFirst using Java 8 Streams methods...!!! Share on X
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