Java Collections synchronizedNavigableSet()用法及代碼示例

Java Collections 類的 synchronizedNavigableSet() 方法用於獲取由指定的可導航集支持的同步(線程安全)可導航集。

用法

以下是 synchronizedNavigableSet() 方法的聲明：

public static <T> NavigableSet<T> synchronizedNavigableSet(NavigableSet<T> s)

參數

參數	描述	必需/可選
s	它是將被包裝在同步可導航集中的可導航集。	Required

synchronizedNavigableSet() 方法返回指定 Navigable Set 的同步視圖。

異常

兼容版本

Java 1.8 及以上

例子1

import java.util.*;
public class CollectionsSynchronizedNavigableSetExample1 {
    public static void main(String[] args) {
        NavigableSet<String> set = new TreeSet<>();
        set.add("Instagram");
        set.add("JavaTpoint");
        set.add("Facebook");
        set.add("Google");
        Set<String> synset = Collections.synchronizedNavigableSet(set);
        System.out.println("Synchronized navigable set is:" + synset);	            
          }
}

輸出：

Synchronized navigable set is:[Facebook, Google, Instagram, JavaTpoint]

例子2

import java.util.*;
public class CollectionsSynchronizedNavigableSetExample2 {
    public static void main(String[] args) {
        NavigableSet<Integer> set = new TreeSet<>();
        set.add(1001);
        set.add(1002);
        set.add(1003);
        set.add(1004);
        set.add(1005);
        System.out.println("Set before Synchronized navigable set:" + set);
        Set<Integer> synset = Collections.synchronizedNavigableSet(set);	
         set.remove(1004);
         System.out.println("Synchronized navigable set after remove(1004):" + synset);
         }
}

輸出：

Set before Synchronized navigable set:[1001, 1002, 1003, 1004, 1005]
Synchronized navigable set after remove(1004):[1001, 1002, 1003, 1005]

例子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 CollectionsSynchronizedNavigableSetExample3 {
    private static AtomicInteger atomicInteger = new AtomicInteger(0);
    public static void main(String[] args) throws InterruptedException {
        NavigableSet<Integer> s = new TreeSet<>();
        NavigableSet<Integer> theSet = Collections.synchronizedNavigableSet(s);
        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
    }
}

輸出：

示例 4

import java.util.*;
public class CollectionsSynchronizedNavigableSetExample4 {
    public static void main(String[] args) {
        NavigableSet<Integer> set = new TreeSet<>();
        set.add(1001);
        set.add(1002);
        set.add(1003);
        set.add(1004);
        set.add(1005);
        System.out.println("Set before Synchronized navigable set:" + set);
        Collections.synchronizedNavigableSet(set);
        Iterator<Integer> itr=set.iterator();
        System.out.println("Set after Synchronized navigable set-");
        while(itr.hasNext()){  
            System.out.println(itr.next());  
         	}         
          }
}

輸出：

Set before Synchronized navigable set:[1001, 1002, 1003, 1004, 1005]
Set after Synchronized navigable set-
1001
1002
1003
1004
1005

相關用法

注：本文由純淨天空篩選整理自 Java Collections synchronizedNavigableSet() Method。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。