Java LongBuffer slice()用法及代碼示例

java.nio.LongBuffer類的slice()方法用於創建一個新的Long緩衝區，其內容是給定緩衝區內容的共享子序列。

新緩衝區的內容將從該緩衝區的當前位置開始。對該緩衝區內容的更改將在新緩衝區中可見，反之亦然。這兩個緩衝區的位置，限製和標記值將是獨立的。

新緩衝區的位置將為零，其容量和限製將是此緩衝區中剩餘的Longegers數量，並且其標記將不確定。當且僅當該緩衝區是直接緩衝區時，新緩衝區才是直接緩衝區；當且僅當該緩衝區是隻讀緩衝區時，新緩衝區才是隻讀緩衝區。

用法:

public abstract LongBuffer slice()

返回值：此方法返回新的Long緩衝區。

下麵是說明slice()方法的示例：

示例1:

// Java program to demonstrate 
// slice() method 
  
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(9); 
  
            // prLong the LongBuffer 
            System.out.println("Original LongBuffer: "
                               + Arrays.toString(ib1.array())); 
  
            // prLong the LongBuffer position 
            System.out.println("position: " + ib1.position()); 
  
            // prLong the LongBuffer capacity 
            System.out.println("capacity: " + ib1.capacity()); 
  
            // Creating a shared subsequance buffer of given LongBuffer 
            // using slice() method 
            LongBuffer ib2 = ib1.slice(); 
  
            // prLong the shared subsequance buffer 
            System.out.println("shared subsequance LongBuffer: "
                               + Arrays.toString(ib2.array())); 
  
            // prLong the LongBuffer position 
            System.out.println("position: " + ib2.position()); 
  
            // prLong the LongBuffer capacity 
            System.out.println("capacity: " + ib2.capacity()); 
        } 
  
        catch (IllegalArgumentException e) { 
  
            System.out.println("IllegalArgumentException catched"); 
        } 
  
        catch (ReadOnlyBufferException e) { 
  
            System.out.println("ReadOnlyBufferException catched"); 
        } 
    } 
}

輸出：

Original LongBuffer: [8, 9, 0, 0, 0, 0, 0, 0, 0, 0]
position: 2
capacity: 10
shared subsequance LongBuffer: [8, 9, 0, 0, 0, 0, 0, 0, 0, 0]
position: 0
capacity: 8

示例2:

// Java program to demonstrate 
// slice() method 
  
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 floatbuffer 
            ib1.put(8); 
            ib1.put(9); 
            ib1.put(5); 
            ib1.put(3); 
  
            // prLong the LongBuffer 
            System.out.println("Original LongBuffer: "
                               + Arrays.toString(ib1.array())); 
  
            // prLong the LongBuffer position 
            System.out.println("position: " + ib1.position()); 
  
            // prLong the LongBuffer capacity 
            System.out.println("capacity: " + ib1.capacity()); 
  
            // Creating a shared subsequance buffer of given LongBuffer 
            // using slice() method 
            LongBuffer ib2 = ib1.slice(); 
            ib2.put(2); 
            ib2.put(6); 
  
            // prLong the shared subsequance buffer 
            System.out.println("shared subsequance LongBuffer: "
                               + Arrays.toString(ib2.array())); 
  
            // prLong the LongBuffer position 
            System.out.println("position: " + ib2.position()); 
  
            // prLong the LongBuffer capacity 
            System.out.println("capacity: " + ib2.capacity()); 
        } 
  
        catch (IllegalArgumentException e) { 
  
            System.out.println("IllegalArgumentException catched"); 
        } 
  
        catch (ReadOnlyBufferException e) { 
  
            System.out.println("ReadOnlyBufferException catched"); 
        } 
    } 
}

輸出：

Original LongBuffer: [8, 9, 5, 3, 0, 0, 0, 0, 0, 0]
position: 4
capacity: 10
shared subsequance LongBuffer: [8, 9, 5, 3, 2, 6, 0, 0, 0, 0]
position: 2
capacity: 6

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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 slice() 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。