concurrent/PizzaStreams.java · ThisYoung/OnJava8-Examples

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OnJava8-Examples

concurrent

PizzaStreams.java

PizzaStreams.java 1.17 KB

// concurrent/PizzaStreams.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;
import java.util.stream.*;
import onjava.Timer;

public class PizzaStreams {
 static final int QUANTITY = 5;
 public static void main(String[] args) {
 Timer timer = new Timer();
 IntStream.range(0, QUANTITY)
 .mapToObj(Pizza::new)
 .parallel() // [1]
 .forEach(za -> {
 while(!za.complete())
 za.next();
 });
 System.out.println(timer.duration());
 }
}
/* Output:
Pizza 2: ROLLED
Pizza 0: ROLLED
Pizza 1: ROLLED
Pizza 4: ROLLED
Pizza 3: ROLLED
Pizza 2: SAUCED
Pizza 1: SAUCED
Pizza 0: SAUCED
Pizza 4: SAUCED
Pizza 3: SAUCED
Pizza 2: CHEESED
Pizza 1: CHEESED
Pizza 0: CHEESED
Pizza 4: CHEESED
Pizza 3: CHEESED
Pizza 2: TOPPED
Pizza 1: TOPPED
Pizza 0: TOPPED
Pizza 4: TOPPED
Pizza 3: TOPPED
Pizza 2: BAKED
Pizza 1: BAKED
Pizza 0: BAKED
Pizza 4: BAKED
Pizza 3: BAKED
Pizza 2: SLICED
Pizza 1: SLICED
Pizza 0: SLICED
Pizza 4: SLICED
Pizza 3: SLICED
Pizza 2: BOXED
Pizza 1: BOXED
Pizza 0: BOXED
Pizza 4: BOXED
Pizza 3: BOXED
1739
*/

一键复制编辑原始数据按行查看历史

Bruce Eckel 提交于 2017年05月11日 01:45 +08:00 . Narrowed listing widths, fixed output

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

// concurrent/PizzaStreams.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;
import java.util.stream.*;
import onjava.Timer;

public class PizzaStreams {
 static final int QUANTITY = 5;
 public static void main(String[] args) {
 Timer timer = new Timer();
 IntStream.range(0, QUANTITY)
 .mapToObj(Pizza::new)
 .parallel() // [1]
 .forEach(za -> {
 while(!za.complete())
 za.next();
 });
 System.out.println(timer.duration());
 }
}
/* Output:
Pizza 2: ROLLED
Pizza 0: ROLLED
Pizza 1: ROLLED
Pizza 4: ROLLED
Pizza 3: ROLLED
Pizza 2: SAUCED
Pizza 1: SAUCED
Pizza 0: SAUCED
Pizza 4: SAUCED
Pizza 3: SAUCED
Pizza 2: CHEESED
Pizza 1: CHEESED
Pizza 0: CHEESED
Pizza 4: CHEESED
Pizza 3: CHEESED
Pizza 2: TOPPED
Pizza 1: TOPPED
Pizza 0: TOPPED
Pizza 4: TOPPED
Pizza 3: TOPPED
Pizza 2: BAKED
Pizza 1: BAKED
Pizza 0: BAKED
Pizza 4: BAKED
Pizza 3: BAKED
Pizza 2: SLICED
Pizza 1: SLICED
Pizza 0: SLICED
Pizza 4: SLICED
Pizza 3: SLICED
Pizza 2: BOXED
Pizza 1: BOXED
Pizza 0: BOXED
Pizza 4: BOXED
Pizza 3: BOXED
1739
*/