Example usage for java.util.stream Collectors summarizingDouble

Introduction

In this page you can find the example usage for java.util.stream Collectors summarizingDouble.

Prototype

public static <T> Collector<T, ?, DoubleSummaryStatistics> summarizingDouble(
        ToDoubleFunction<? super T> mapper) 

Source Link

Document

Returns a Collector which applies an double -producing mapping function to each input element, and returns summary statistics for the resulting values.

Usage

From source file:org.eclipse.collections.impl.jmh.AggregateByTest.java

@Benchmark
public Map<Product, DoubleSummaryStatistics> aggregateByProduct_serial_lazy_streams_ec() {
    Map<Product, DoubleSummaryStatistics> result = this.ecPositions.stream().collect(Collectors
            .groupingBy(Position::getProduct, Collectors.summarizingDouble(Position::getMarketValue)));
    Assert.assertNotNull(result);//  w w w. j av  a  2  s .  co  m
    return result;
}

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From source file:org.eclipse.collections.impl.jmh.AggregateByTest.java

@Benchmark
public Map<Account, DoubleSummaryStatistics> aggregateByAccount_serial_lazy_jdk() {
    Map<Account, DoubleSummaryStatistics> accountDoubleMap = this.jdkPositions.stream().collect(Collectors
            .groupingBy(Position::getAccount, Collectors.summarizingDouble(Position::getMarketValue)));
    Assert.assertNotNull(accountDoubleMap);
    return accountDoubleMap;
}

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From source file:org.eclipse.collections.impl.jmh.AggregateByTest.java

@Benchmark
public Map<Account, DoubleSummaryStatistics> aggregateByAccount_serial_lazy_streams_ec() {
    Map<Account, DoubleSummaryStatistics> accountDoubleMap = this.ecPositions.stream().collect(Collectors
            .groupingBy(Position::getAccount, Collectors.summarizingDouble(Position::getMarketValue)));
    Assert.assertNotNull(accountDoubleMap);
    return accountDoubleMap;
}

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From source file:org.eclipse.collections.impl.jmh.AggregateByTest.java

@Benchmark
public Map<String, DoubleSummaryStatistics> aggregateByCategory_serial_lazy_jdk() {
    Map<String, DoubleSummaryStatistics> categoryDoubleMap = this.jdkPositions.stream().collect(Collectors
            .groupingBy(Position::getCategory, Collectors.summarizingDouble(Position::getMarketValue)));
    Assert.assertNotNull(categoryDoubleMap);
    return categoryDoubleMap;
}

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From source file:org.eclipse.collections.impl.jmh.AggregateByTest.java

@Benchmark
public Map<String, DoubleSummaryStatistics> aggregateByCategory_serial_lazy_streams_ec() {
    Map<String, DoubleSummaryStatistics> categoryDoubleMap = this.ecPositions.stream().collect(Collectors
            .groupingBy(Position::getCategory, Collectors.summarizingDouble(Position::getMarketValue)));
    Assert.assertNotNull(categoryDoubleMap);
    return categoryDoubleMap;
}

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From source file:org.eclipse.collections.impl.jmh.AggregateByTest.java

@Benchmark
public Map<Product, DoubleSummaryStatistics> aggregateByProduct_parallel_lazy_jdk() {
    Map<Product, DoubleSummaryStatistics> result = this.jdkPositions.parallelStream().collect(Collectors
            .groupingBy(Position::getProduct, Collectors.summarizingDouble(Position::getMarketValue)));
    Assert.assertNotNull(result);//from w  w w.j  a v  a  2 s.  c  o  m
    return result;
}

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From source file:org.eclipse.collections.impl.jmh.AggregateByTest.java

@Benchmark
public Map<Product, DoubleSummaryStatistics> aggregateByProduct_parallel_lazy_streams_ec() {
    Map<Product, DoubleSummaryStatistics> result = this.ecPositions.parallelStream().collect(Collectors
            .groupingBy(Position::getProduct, Collectors.summarizingDouble(Position::getMarketValue)));
    Assert.assertNotNull(result);//from  w ww.  j  av  a 2s.com
    return result;
}

---

From source file:org.eclipse.collections.impl.jmh.AggregateByTest.java

@Benchmark
public Map<Account, DoubleSummaryStatistics> aggregateByAccount_parallel_lazy_jdk() {
    Map<Account, DoubleSummaryStatistics> result = this.jdkPositions.parallelStream().collect(Collectors
            .groupingBy(Position::getAccount, Collectors.summarizingDouble(Position::getMarketValue)));
    Assert.assertNotNull(result);//from   w ww.jav  a 2 s  . c om
    return result;
}

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From source file:org.eclipse.collections.impl.jmh.AggregateByTest.java

@Benchmark
public Map<Account, DoubleSummaryStatistics> aggregateByAccount_parallel_lazy_streams_ec() {
    Map<Account, DoubleSummaryStatistics> result = this.ecPositions.parallelStream().collect(Collectors
            .groupingBy(Position::getAccount, Collectors.summarizingDouble(Position::getMarketValue)));
    Assert.assertNotNull(result);/*from  www  .  ja  v  a 2  s  .c  o  m*/
    return result;
}

---

From source file:org.eclipse.collections.impl.jmh.AggregateByTest.java

@Benchmark
public Map<String, DoubleSummaryStatistics> aggregateByCategory_parallel_lazy_jdk() {
    Map<String, DoubleSummaryStatistics> result = this.jdkPositions.parallelStream().collect(Collectors
            .groupingBy(Position::getCategory, Collectors.summarizingDouble(Position::getMarketValue)));
    Assert.assertNotNull(result);/*from  www .  j  a v a 2  s.  c o m*/
    return result;
}

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