Java AtomicReferenceArray set()用法及代碼示例

AtomicReferenceArray類的set()方法用於將索引i處的元素值設置為newValue。索引i和newValue都作為參數傳遞給該方法。此方法使用讀取的內存語義來設置值，就像將變量聲明為變量的易失性類型一樣。

用法:

public final void set(int i, E newValue)

參數：此方法接受：

i這是執行操作的AtomicReferenceArray的索引，
newValue 這是要設置的新值。

返回值：此方法不返回任何內容。

以下示例程序旨在說明set()方法：
程序1:

// Java program to demonstrate 
// AtomicReferenceArray.set() method 
  
import java.util.concurrent.atomic.*; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // create an atomic reference object. 
        AtomicReferenceArray<Integer> ref 
            = new AtomicReferenceArray<Integer>(5); 
  
        // set some value and print 
        ref.set(0, 2345); 
        ref.set(1, 543); 
        ref.set(2, 322); 
  
        System.out.println("Value of index 0 = "
                           + ref.get(0)); 
        System.out.println("Value of index 1 = "
                           + ref.get(1)); 
        System.out.println("Value of index 2 = "
                           + ref.get(2)); 
    } 
}

輸出：

Value of index 0 = 2345
Value of index 1 = 543
Value of index 2 = 322

程序2:

// Java program to demonstrate 
// AtomicReferenceArray.set() method 
  
import java.util.concurrent.atomic.*; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // create an atomic reference object.c 
        AtomicReferenceArray<String> ref 
            = new AtomicReferenceArray<String>(5); 
  
        // set some value 
        ref.set(0, "C"); 
        ref.set(1, "PYTHON"); 
        ref.set(2, "TS"); 
        ref.set(3, "C++"); 
        ref.set(4, "C"); 
  
        // print 
        for (int i = 0; i < 5; i++) { 
            System.out.println(ref.get(i)); 
        } 
    } 
}

輸出：

C
PYTHON
TS
C++
C

參考文獻： https://docs.oracle.com/javase/10/docs/api/java/util/concurrent/atomic/AtomicReferenceArray.html#set(int, E)

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