Java LongBuffer duplicate()用法及代碼示例

java.nio.LongBuffer類的duplicate()方法用於創建共享給定緩衝區內容的新Long緩衝區。

用法:

public abstract LongBuffer duplicate()

返回值：此方法返回新的Long緩衝區，該緩衝區承載了先前的Long緩衝區內容

下麵是說明duplicate()方法的示例：

範例1：使用直接Longbuffer

// Java program to demonstrate 
// duplicate() method 
// Using direct Longbuffer 
  
import java.nio.*; 
import java.util.*; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // Declaring the capacity of the LongBuffer 
        int capacity = 10; 
  
        // Creating the LongBuffer 
        try { 
  
            // creating object of Longbuffer 
            // and allocating size capacity 
            LongBuffer ib1 = LongBuffer.allocate(capacity); 
  
            // putting the value in Longbuffer 
            ib1.put(8); 
            ib1.put(2, 9); 
            ib1.rewind(); 
  
            // prLong the Original LongBuffer 
            System.out.println("Original LongBuffer: "
                               + Arrays.toString(ib1.array())); 
  
            // Creating a duplicate copy of LongBuffer 
            // using duplicate() method 
            LongBuffer ib2 = ib1.duplicate(); 
  
            // prLong the duplicate copy of LongBuffer 
            System.out.println("Duplicate LongBuffer: "
                               + Arrays.toString(ib2.array())); 
        } 
  
        catch (IllegalArgumentException e) { 
  
            System.out.println("IllegalArgumentException catched"); 
        } 
  
        catch (ReadOnlyBufferException e) { 
  
            System.out.println("ReadOnlyBufferException catched"); 
        } 
    } 
}

輸出：

Original LongBuffer: [8, 0, 9, 0, 0, 0, 0, 0, 0, 0]
Duplicate LongBuffer: [8, 0, 9, 0, 0, 0, 0, 0, 0, 0]

範例2：使用read-onlyLongbuffer

// Java program to demonstrate 
// duplicate() method 
// using read-onlyLongbuffer 
  
import java.nio.*; 
import java.util.*; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // Declaring the capacity of the LongBuffer 
        int capacity = 10; 
  
        // Creating the LongBuffer 
        try { 
  
            // creating object of Longbuffer 
            // and allocating size capacity 
            LongBuffer ib1 = LongBuffer.allocate(capacity); 
  
            // putting the value in Longbuffer 
            ib1.put(8); 
            ib1.put(2, 9); 
            ib1.rewind(); 
  
            // prLong the Original LongBuffer 
            System.out.println("Original LongBuffer:  "
                               + Arrays.toString(ib1.array())); 
  
            // Creating a read-only copy of LongBuffer 
            // using asReadOnlyBuffer() method 
            LongBuffer readonly = ib1.asReadOnlyBuffer(); 
  
            // prLong the read-only copy of LongBuffer 
            System.out.print("read-only LongBuffer:  "); 
            while (readonly.hasRemaining()) 
                System.out.print(readonly.get() + ", "); 
            System.out.println(""); 
  
            // Rewinding the readonly LongBuffer 
            readonly.rewind(); 
  
            // Creating a duplicate copy of LongBuffer 
            // using duplicate() method 
            LongBuffer ib2 = readonly.duplicate(); 
  
            // prLong the duplicate copy of LongBuffer 
            System.out.print("duplicate copy of read-only LongBuffer:  "); 
  
            while (ib2.hasRemaining()) 
                System.out.print(ib2.get() + ", "); 
            System.out.println(""); 
        } 
  
        catch (IllegalArgumentException e) { 
            System.out.println("IllegalArgumentException catched"); 
        } 
  
        catch (ReadOnlyBufferException e) { 
            System.out.println("ReadOnlyBufferException catched"); 
        } 
    } 
}

輸出：

Original LongBuffer:  [8, 0, 9, 0, 0, 0, 0, 0, 0, 0]
read-only LongBuffer:  8, 0, 9, 0, 0, 0, 0, 0, 0, 0, 
duplicate copy of read-only LongBuffer:  8, 0, 9, 0, 0, 0, 0, 0, 0, 0,

相關用法

注：本文由純淨天空篩選整理自pawan_asipu大神的英文原創作品 LongBuffer duplicate() method in Java。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。