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Java 8 Streams - DoubleStream.max Examples

[Last Updated: Nov 8, 2025]

Java 8 Streams Java Java API 

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Interface:

java.util.stream.DoubleStream

java.lang.AutoCloseableAutoCloseablejava.util.stream.BaseStreamBaseStreamjava.util.stream.DoubleStreamDoubleStreamLogicBig

Method:

OptionalDouble max()

This terminal operation returns an OptionalDouble describing the maximum element of this stream, or an empty optional if this stream is empty. This is a special case of a reduction.

Examples


package com.logicbig.example.doublestream;

import java.util.OptionalDouble;
import java.util.stream.DoubleStream;

public class MaxExample {

    public static void main(String... args) {
        DoubleStream ds = DoubleStream.of(1.0, 1.2, 2.0, 2.4, 3.0);
        OptionalDouble od = ds.max();
        if (od.isPresent()) {
            System.out.println(od.getAsDouble());
        }
    }
}

Output

3.0




package com.logicbig.example.doublestream;

import java.util.OptionalDouble;
import java.util.stream.DoubleStream;

public class MaxExample2 {

    public static void main(String... args) {
        OptionalDouble od = DoubleStream.empty()
                                        .max();
        System.out.println(od.isPresent());
    }
}

Output

false

See Also