java.util.concurrent.ConcurrentSkipListMap的put()方法是Java中的內置函數,它將指定值與該映射中的指定鍵相關聯。如果該映射先前包含該鍵的映射,則替換舊值。
用法:
public V put(K key, V value)
參數:該函數接受兩個強製性參數:
- key它指定與指定值關聯的鍵
- value:它指定與指定鍵關聯的值。
返回值:該函數返回與指定鍵關聯的先前值。如果指定鍵沒有映射,則此方法返回null。
以下示例程序旨在說明上述方法:
示例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);
}
}
輸出:
After put(): {1=1, 2=2, 3=3, 4=4, 5=5}
示例2:
// 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);
}
}
輸出:
After put(): {1=1, 2=2, 3=3, 4=4, 5=5, 6=6, 7=7, 8=8, 9=9}
參考: https://docs.oracle.com/javase/9/docs/api/java/util/concurrent/ConcurrentSkipListMap.html#put-K-V-
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注:本文由純淨天空篩選整理自Twinkl Bajaj大神的英文原創作品 ConcurrentSkipListMap put() method in Java with Examples。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。