Java ShortBuffer array()方法及示例

java.nio.ShortBuffer 的 array() 方法用于返回支持此缓冲区的短数组（可选）。
对此缓冲区内容的修改将导致返回的数组内容被修改，反之亦然。
在调用此方法之前调用hasArray方法，以确保此缓冲区有一个可访问的支持阵列。

语法:

public final short[] array()

参数 ：该方法不接受任何参数。

返回值 : 该方法返回支持缓冲区的数组。

异常。

以下程序说明了 array() 方法的使用。

程序1 :

// Java program to demonstrate// array() 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 sb = ShortBuffer.allocate(capacity);              // putting the value in Shortbuffer            sb.put((short)856);            sb.put(2, (short)9);            sb.rewind();              // getting array from fb ShortBuffer using array() method            short[] sbb = sb.array();              // printing the ShortBuffer fb            System.out.println("ShortBuffer: "                               + Arrays.toString(sbb));        }          catch (IllegalArgumentException e) {              System.out.println("IllegalArgumentException catched");        }          catch (ReadOnlyBufferException e) {              System.out.println("ReadOnlyBufferException catched");        }    }}

输出:

ShortBuffer: [856, 0, 9, 0, 0, 0, 0, 0, 0, 0]

程序2 ：显示ReadOnlyBufferException

// Java program to demonstrate// array() method  import java.nio.*;import java.util.*;  public class GFG {    public static void main(String[] args)    {          // Declaring the capacity of the sb        int capacity1 = 10;          // Declaring the capacity of the sb1        int capacity2 = 5;          // Creating the ShortBuffer        try {            //            // sb            //            // creating object of Shortbuffer sb            // and allocating size capacity            ShortBuffer sb = ShortBuffer.allocate(capacity1);              // putting the value in sb            sb.put((short)96);            sb.put(2, (short)7);            sb.put(3, (short)41);            sb.rewind();              // print the ShortBuffer            System.out.println("ShortBuffer sb: "                               + Arrays.toString(sb.array()));              //            // sb1            //            // creating object of Shortbuffer sb1            // and allocating size capacity            ShortBuffer sb1 = ShortBuffer.allocate(capacity2);              // putting the value in sb1            sb1.put(1, (short)445);            sb1.put(2, (short)64);            sb1.rewind();              // print the ShortBuffer            System.out.println("\nShortBuffer sb1: "                               + Arrays.toString(sb1.array()));              // Creating a read-only copy of ShortBuffer            // using asReadOnlyBuffer() method            ShortBuffer readOnlysb = sb.asReadOnlyBuffer();              // print the ShortBuffer            System.out.print("\nReadOnlyBuffer ShortBuffer: ");              while (readOnlysb.hasRemaining())                System.out.print(readOnlysb.get() + ", ");              // try to change readOnlysb            System.out.println("\n\nTrying to get the array"                               + " from ReadOnlysb for editing");              short[] sbarr = readOnlysb.array();        }        catch (IllegalArgumentException e) {            System.out.println("IllegalArgumentException catched");        }        catch (ReadOnlyBufferException e) {            System.out.println("Exception thrown: " + e);        }    }}

输出:

ShortBuffer sb: [96, 0, 7, 41, 0, 0, 0, 0, 0, 0]ShortBuffer sb1: [0, 445, 64, 0, 0]ReadOnlyBuffer ShortBuffer: 96, 0, 7, 41, 0, 0, 0, 0, 0, 0, Trying to get the array from ReadOnlysb for editingException thrown: java.nio.ReadOnlyBufferException