Java ShortBuffer slice()方法及示例

java.nio.ShortBuffer 类的 slice() 方法用于创建一个新的短缓冲区，其内容是这个缓冲区内容的共享子序列。

新缓冲区的内容将从这个缓冲区的当前位置开始。对这个缓冲区内容的改变将在新的缓冲区中可见，反之亦然；两个缓冲区的位置、极限和标记值将是独立的。
新缓冲区的位置将是0，它的容量和极限将是这个缓冲区中剩余的短消息的数量，它的标记将是未定义的。新的缓冲区将是直接的，当且仅当这个缓冲区是直接的，它将是只读的，当且仅当这个缓冲区是只读的。

语法:

public abstract ShortBuffer slice()

返回值 ：该方法返回 新的短缓冲区 。

下面是说明 slice() 方法的例子。

程序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 ShortBuffer
        int capacity = 10;
 
        // Creating the ShortBuffer
        try {
 
            // creating object of Shortbuffer
            // and allocating size capacity
            ShortBuffer sb1 = ShortBuffer.allocate(capacity);
 
            // putting the value in Shortbuffer
            sb1.put((short)856);
            sb1.put((short)961);
 
            // print the ShortBuffer
            System.out.println("Original ShortBuffer: "
                               + Arrays.toString(sb1.array()));
 
            // print the ShortBuffer position
            System.out.println("\nposition: " + sb1.position());
 
            // print the ShortBuffer capacity
            System.out.println("\ncapacity: " + sb1.capacity());
 
            // Creating a shared subsequence buffer of given ShortBuffer
            // using slice() method
            ShortBuffer sb2 = sb1.slice();
 
            // print the shared subsequence buffer
            System.out.println("\nshared subsequence ShortBuffer: "
                               + Arrays.toString(sb2.array()));
 
            // print the ShortBuffer position
            System.out.println("\nposition: " + sb2.position());
 
            // print the ShortBuffer capacity
            System.out.println("\ncapacity: " + sb2.capacity());
        }
 
        catch (IllegalArgumentException e) {
 
            System.out.println("IllegalArgumentException catched");
        }
 
        catch (ReadOnlyBufferException e) {
 
            System.out.println("ReadOnlyBufferException catched");
        }
    }
}

输出

Original ShortBuffer: [856, 961, 0, 0, 0, 0, 0, 0, 0, 0]

position: 2

capacity: 10

shared subsequence ShortBuffer: [856, 961, 0, 0, 0, 0, 0, 0, 0, 0]

position: 0

capacity: 8

程序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 ShortBuffer
        int capacity = 10;
 
        // Creating the ShortBuffer
        try {
 
            // creating object of Shortbuffer
            // and allocating size capacity
            ShortBuffer sb1 = ShortBuffer.allocate(capacity);
 
            // putting the value in Shortbuffer
            sb1.put((short)856);
            sb1.put((short)961);
            sb1.put((short)656);
            sb1.put((short)361);
 
            // print the ShortBuffer
            System.out.println("Original ShortBuffer: "
                               + Arrays.toString(sb1.array()));
 
            // print the ShortBuffer position
            System.out.println("\nposition: " + sb1.position());
 
            // print the ShortBuffer capacity
            System.out.println("\ncapacity: " + sb1.capacity());
 
            // Creating a shared subsequence buffer of given ShortBuffer
            // using slice() method
            ShortBuffer sb2 = sb1.slice();
            sb2.put((short)234);
            sb2.put((short)634);
 
            // print the shared subsequence buffer
            System.out.println("\nshared subsequence ShortBuffer: "
                               + Arrays.toString(sb2.array()));
 
            // print the ShortBuffer position
            System.out.println("\nposition: " + sb2.position());
 
            // print the ShortBuffer capacity
            System.out.println("\ncapacity: " + sb2.capacity());
        }
 
        catch (IllegalArgumentException e) {
 
            System.out.println("IllegalArgumentException catched");
        }
 
        catch (ReadOnlyBufferException e) {
 
            System.out.println("ReadOnlyBufferException catched");
        }
    }
}

输出

Original ShortBuffer: [856, 961, 656, 361, 0, 0, 0, 0, 0, 0]

position: 4

capacity: 10

shared subsequence ShortBuffer: [856, 961, 656, 361, 234, 634, 0, 0, 0, 0]

position: 2

capacity: 6