Java Collections SynchronizedSortedSet()
Java集合类的
synchronizedSortedSet()方法用于获取同步(线程安全的)排序集，由指定的排序集支持。
语法
下面是
synchronizedSortedSet()方法的声明:
public static <T> SortedSet<T> synchronizedSortedSet(SortedSet<T> s)
参数
| 参数 |
说明 |
必需/可选 |
| s |
它是排序后的集合，将被包装在一个同步的排序后的集合中。 |
必需 |
返回
syncnedSortedSet()方法返回指定排序集的同步视图。
异常
NA
示例1
import java.util.*;
public class CollectionsSynchronizedSortedSetExample1 {
public static void main(String[] args) {
//Create set
SortedSet<String> set = new TreeSet<String>();
//Add values in the set
set.add("Facebook");
set.add("Twitter");
set.add("Whatsapp");
set.add("Instagram");
//Create a synchronized sorted set
Set<String> synset = Collections.synchronizedSortedSet(set);
System.out.println("Synchronized Sorted set is :"+synset);
}
}
输出:
Synchronized Sorted set is :[Facebook, Instagram, Twitter, Whatsapp]
示例2
import java.util.*;
public class CollectionsSynchronizedSortedSetExample2 {
public static void main(String[] args) {
SortedSet<Integer> set = Collections.synchronizedSortedSet(new TreeSet<>());
set.add(101);
set.add(104);
set.add(103);
set.add(102);
set.add(105);
System.out.println("Set after synchronized sorted set-");
//Using iterator must be synchronized manually
synchronized (set) {
Iterator<Integer> iterator = set.iterator();
while (iterator.hasNext()) {
Integer num = iterator.next();
System.out.println(num);
}
}
}
}
输出:
Set after synchronized sorted set-
101
102
103
104
105
示例3
import java.util.*;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
public class CollectionsSynchronizedSortedSetExample3 {
private static AtomicInteger atomicInteger = new AtomicInteger(0);
public static void main(String[] args) throws InterruptedException {
SortedSet<Integer> set = new TreeSet<>();
SortedSet<Integer> theSet = Collections.synchronizedSortedSet(set);
final ExecutorService e = Executors.newFixedThreadPool(1000);
for (int i = 1; i <= 1000; i++) {
e.execute(() -> {
int n = atomicInteger.incrementAndGet();
try {
theSet.add(n);
} catch (Exception e1) {
System.out.println(e1 + " " + n);
}
});
}
e.shutdown();
e.awaitTermination(1000, TimeUnit.SECONDS);
System.out.println(theSet.size());//should be 1000
}
}
输出:
