Java IntBuffer slice()用法及代码示例

java.nio.IntBuffer类的slice()方法用于创建一个新的int缓冲区，其内容是给定缓冲区内容的共享子序列。

新缓冲区的内容将从该缓冲区的当前位置开始。对该缓冲区内容的更改将在新缓冲区中可见，反之亦然。这两个缓冲区的位置，限制和标记值将是独立的。新缓冲区的位置将为零，其容量和限制将为该缓冲区中剩余的整数数量，并且其标记将不确定。当且仅当该缓冲区是直接缓冲区时，新缓冲区才是直接缓冲区；当且仅当该缓冲区是只读缓冲区时，新缓冲区才是只读缓冲区。

用法:

public abstract IntBuffer slice()

返回值：此方法返回新的int缓冲区。

下面是说明slice()方法的示例：

范例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 IntBuffer 
        int capacity = 10; 
  
        // Creating the IntBuffer 
        try { 
  
            // creating object of intbuffer 
            // and allocating size capacity 
            IntBuffer ib1 = IntBuffer.allocate(capacity); 
  
            // putting the value in intbuffer 
            ib1.put(8); 
            ib1.put(9); 
  
            // print the IntBuffer 
            System.out.println("Original IntBuffer: "
                               + Arrays.toString(ib1.array())); 
  
            // print the IntBuffer position 
            System.out.println("position: " + ib1.position()); 
  
            // print the IntBuffer capacity 
            System.out.println("capacity: " + ib1.capacity()); 
  
            // Creating a shared subsequance buffer of given IntBuffer 
            // using slice() method 
            IntBuffer ib2 = ib1.slice(); 
  
            // print the shared subsequance buffer 
            System.out.println("shared subsequance IntBuffer: "
                               + Arrays.toString(ib2.array())); 
  
            // print the IntBuffer position 
            System.out.println("position: " + ib2.position()); 
  
            // print the IntBuffer capacity 
            System.out.println("capacity: " + ib2.capacity()); 
        } 
  
        catch (IllegalArgumentException e) { 
            System.out.println("IllegalArgumentException catched"); 
        } 
  
        catch (ReadOnlyBufferException e) { 
            System.out.println("ReadOnlyBufferException catched"); 
        } 
    } 
}

输出：

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

范例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 IntBuffer 
        int capacity = 10; 
  
        // Creating the IntBuffer 
        try { 
  
            // creating object of intbuffer 
            // and allocating size capacity 
            IntBuffer ib1 = IntBuffer.allocate(capacity); 
  
            // putting the value in floatbuffer 
            ib1.put(8); 
            ib1.put(9); 
            ib1.put(5); 
            ib1.put(3); 
  
            // print the IntBuffer 
            System.out.println("Original IntBuffer: "
                               + Arrays.toString(ib1.array())); 
  
            // print the IntBuffer position 
            System.out.println("position: " + ib1.position()); 
  
            // print the IntBuffer capacity 
            System.out.println("capacity: " + ib1.capacity()); 
  
            // Creating a shared subsequance buffer of given IntBuffer 
            // using slice() method 
            IntBuffer ib2 = ib1.slice(); 
            ib2.put(2); 
            ib2.put(6); 
  
            // print the shared subsequance buffer 
            System.out.println("shared subsequance IntBuffer: "
                               + Arrays.toString(ib2.array())); 
  
            // print the IntBuffer position 
            System.out.println("position: " + ib2.position()); 
  
            // print the IntBuffer capacity 
            System.out.println("capacity: " + ib2.capacity()); 
        } 
  
        catch (IllegalArgumentException e) { 
  
            System.out.println("IllegalArgumentException catched"); 
        } 
  
        catch (ReadOnlyBufferException e) { 
  
            System.out.println("ReadOnlyBufferException catched"); 
        } 
    } 
}

输出：

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

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注：本文由纯净天空筛选整理自nitin_sharma大神的英文原创作品 IntBuffer slice() method in Java。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。