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Java 8 Streams - DoubleStream.allMatch Examples

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:

boolean allMatch(DoublePredicate predicate)

This terminal-short-circuiting operation returns whether all elements match the provided predicate criteria. It returns 'false' on finding the first mismatch hence short-circuiting the operation.

If the stream is empty then this method returns true and the predicate is not evaluated.

Examples


package com.logicbig.example.doublestream;

import java.util.stream.DoubleStream;

public class AllMatchExample {

    public static void main(String... args) {
        DoubleStream doubleStream = DoubleStream.of(1.2, 1.3, 1.4, 1.5, 1.6);
        boolean b = doubleStream.allMatch(value -> value < 2.0d);
        System.out.println(b);

        DoubleStream doubleStream2 = DoubleStream.of(1.2, 1.3, 1.4, 1.5, 2.0001);
        boolean b2 = doubleStream2.allMatch(value -> value <= 2.0d);
        System.out.println(b2);
    }
}

Output

true
false




package com.logicbig.example.doublestream;

import java.util.stream.DoubleStream;

public class AllMatchExample2 {

    public static void main(String... args) {
        DoubleStream doubleStream = DoubleStream.empty();
        boolean b = doubleStream.allMatch(d -> false);
        System.out.println(b);
    }
}

Output

true

See Also