Java中的 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，其内容是该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。此缓冲区内容的更改将在新缓冲区中可见，反之亦然；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，其容量和限制将是此缓冲区中剩余的短路数，其标记将未定义。当且仅当此缓冲区是直接的时，新缓冲区将是直接的，并且当且仅当此缓冲区是只读的时，它将是只读的。

语法：

public abstract ShortBuffer slice()

返回值：此方法返回新的短缓冲区。

以下是说明slice()方法的示例：

程序 1 ：

Java

// 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

方案二：

Java

// 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