Java CharBuffer slice()用法及代碼示例

java.nio.charBuffer類的slice()方法用於創建一個新的char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。新緩衝區將顯示緩衝區內容中所做的更改，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，其容量和限製將為該緩衝區中剩餘的整數數量，並且其標記將不確定。當且僅當此緩衝區是直接緩衝區時，新緩衝區才是直接緩衝區，並且僅當且僅當此緩衝區是隻讀緩衝區時，它才是隻讀的。

用法:

public abstract CharBuffer slice()

返回值：此方法返回新的char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 CharBuffer 
        int capacity = 10; 
  
        // Creating the CharBuffer 
        try { 
  
            // creating object of Charbuffer 
            // and allocating size capacity 
            CharBuffer cb1 = CharBuffer.allocate(capacity); 
  
            // putting the value in intbuffer 
            cb1.put('a'); 
            cb1.put('b'); 
  
            // print the CharBuffer 
            System.out.println("Original CharBuffer: "
                               + Arrays.toString(cb1.array())); 
  
            // print the CharBuffer position 
            System.out.println("position: " + cb1.position()); 
  
            // print the CharBuffer capacity 
            System.out.println("capacity: " + cb1.capacity()); 
  
            // Creating a shared subsequance buffer of given CharBuffer 
            // using slice() method 
            CharBuffer cb2 = cb1.slice(); 
  
            // print the shared subsequance buffer 
            System.out.println("shared subsequance CharBuffer: "
                               + Arrays.toString(cb2.array())); 
  
            // print the CharBuffer position 
            System.out.println("position: " + cb2.position()); 
  
            // print the CharBuffer capacity 
            System.out.println("capacity: " + cb2.capacity()); 
        } 
  
        catch (IllegalArgumentException e) { 
  
            System.out.println("IllegalArgumentException catched"); 
        } 
  
        catch (ReadOnlyBufferException e) { 
  
            System.out.println("ReadOnlyBufferException catched"); 
        } 
    } 
}

輸出：

Original CharBuffer: [a, b, , , , , , , , ]
position: 2
capacity: 10
shared subsequance CharBuffer: [a, b, , , , , , , , ]
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 CharBuffer 
        int capacity = 10; 
  
        // Creating the CharBuffer 
        try { 
  
            // creating object of charbuffer 
            // and allocating size capacity 
            CharBuffer cb1 = CharBuffer.allocate(capacity); 
  
            // putting the value in floatbuffer 
            cb1.put('a'); 
            cb1.put('b'); 
            cb1.put('c'); 
            cb1.put('d'); 
  
            // print the CharBuffer 
            System.out.println("Original CharBuffer: "
                               + Arrays.toString(cb1.array())); 
  
            // print the CharBuffer position 
            System.out.println("position: " + cb1.position()); 
  
            // print the CharBuffer capacity 
            System.out.println("capacity: " + cb1.capacity()); 
  
            // Creating a shared subsequance buffer of given CharBuffer 
            // using slice() method 
            CharBuffer cb2 = cb1.slice(); 
            cb2.put('k'); 
            cb2.put('l'); 
  
            // print the shared subsequance buffer 
            System.out.println("shared subsequance CharBuffer: "
                               + Arrays.toString(cb2.array())); 
  
            // print the CharBuffer position 
            System.out.println("position: " + cb2.position()); 
  
            // print the CharBuffer capacity 
            System.out.println("capacity: " + cb2.capacity()); 
        } 
  
        catch (IllegalArgumentException e) { 
  
            System.out.println("IllegalArgumentException catched"); 
        } 
  
        catch (ReadOnlyBufferException e) { 
  
            System.out.println("ReadOnlyBufferException catched"); 
        } 
    } 
}

輸出：

Original CharBuffer: [a, b, c, d, , , , , , ]
position: 4
capacity: 10
shared subsequance CharBuffer: [a, b, c, d, k, l, , , , ]
position: 2
capacity: 6

相關用法

注：本文由純淨天空篩選整理自gopaldave大神的英文原創作品 CharBuffer 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。