Java 中的 ConcurrentSkipListMap put()方法，示例

原文:https://www . geeksforgeeks . org/concurrentskiplistmap-put-method-in-Java-with-examples/

java . util . concurrentskiplistmap的 put() 方法是 Java 中的内置函数，它将指定的值与该映射中的指定键相关联。如果映射先前包含键的映射，则替换旧值。

语法:

public V put(K key, V value)

参数:该函数接受两个强制参数:

  • key specifies the key associated with the specified value.
  • Value: Specifies the value associated with the specified key.

返回值:该函数返回与指定键关联的前一个值。如果指定的键没有映射，则此方法返回 null。

下面的程序说明了上述方法:

程序 1:

// Java Program Demonstrate put()
// method of ConcurrentSkipListMap

import java.util.concurrent.*;

class GFG {
    public static void main(String[] args)
    {

        // Initializing the map
        ConcurrentSkipListMap<Integer, Integer>
            mpp = new ConcurrentSkipListMap<Integer,
                                            Integer>();

        // Adding elements to this map
        for (int i = 1; i <= 5; i++)
            mpp.put(i, i);

        // put() operation on the map
        System.out.println("After put(): "
                           + mpp);
    }
}

输出:

After put(): {1=1, 2=2, 3=3, 4=4, 5=5}

程序二:

// Java Program Demonstrate put()
// method of ConcurrentSkipListMap

import java.util.concurrent.*;

class GFG {
    public static void main(String[] args)
    {

        // Initializing the map
        ConcurrentSkipListMap<Integer, Integer>
            mpp = new ConcurrentSkipListMap<Integer,
                                            Integer>();

        // Adding elements to this map
        for (int i = 1; i <= 9; i++)
            mpp.put(i, i);

        // put() operation on the map
        System.out.println("After put(): "
                           + mpp);
    }
}

输出:

After put(): {1=1, 2=2, 3=3, 4=4, 5=5, 6=6, 7=7, 8=8, 9=9}

参考:https://docs . Oracle . com/javase/9/docs/API/Java/util/concurrentskiplistmap . html # put-K-V-

版权属于：月萌API www.moonapi.com，转载请注明出处

本文链接：https://moonapi.com/news/19434.html