Java ShortBuffer duplicate()方法及示例

java.nio.ShortBuffer 类的 replicate() 方法创建一个新的短缓冲区，共享这个缓冲区的内容。新的缓冲区的内容将是这个缓冲区的内容。这个缓冲区的内容的变化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。新缓冲区的容量、极限、位置和标记值将与这个缓冲区的相同。当且仅当这个缓冲区是直接的，新的缓冲区将是直接的；当且仅当这个缓冲区是只读的，它将是只读的。

语法:

public abstract ShortBuffer duplicate()

返回值 ：该方法返回 新的ShortBuffer

下面的程序说明了 复制() 方法。

程序1 :

// Java program to demonstrate// compareTo() 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;        // Creating the ShortBuffer         // creating object of shortbuffer sb        // and allocating size capacity        ShortBuffer sb1 = ShortBuffer.allocate(capacity1);         // putting the value in sb        sb1.put((short)100);        sb1.put((short)400);        sb1.put((short)210);         // revind the short buffer        sb1.rewind();         // print the Original ShortBuffer        System.out.println("Original ShortBuffer:  "                           + Arrays.toString(sb1.array()));         // creating duplicate        ShortBuffer sb2 = sb1.duplicate();         // print the duplicate copy of ShortBuffer        System.out.println("Duplicate ShortBuffer: "                           + Arrays.toString(sb2.array()));         // checking if the duplicate is correct or not        System.out.println("are sb1 and sb2 equal: "                           + sb1.equals(sb2));    }}

输出

Original ShortBuffer:  [100, 400, 210, 0, 0, 0, 0, 0, 0, 0]Duplicate ShortBuffer: [100, 400, 210, 0, 0, 0, 0, 0, 0, 0]are sb1 and sb2 equal: true

程序2 :

// Java program to demonstrate// compareTo() 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;         // Creating the ShortBuffer         // creating object of shortbuffer sb        // and allocating size capacity        ShortBuffer sb1 = ShortBuffer.allocate(capacity1);        ShortBuffer sb3 = ShortBuffer.allocate(capacity1);         // putting the value in sb        sb1.put((short)100);        sb1.put((short)400);        sb1.put((short)210);         // revind the short buffer        sb1.rewind();         // print the Original ShortBuffer        System.out.println("Original ShortBuffer:  "                           + Arrays.toString(sb1.array()));         // creating duplicate        ShortBuffer sb2 = sb1.duplicate();         // print the duplicate copy of ShortBuffer        System.out.println("Duplicate ShortBuffer: "                           + Arrays.toString(sb2.array()));         // checking if the duplicate is correct or not        System.out.println("are sb1 and sb2 equal: "                           + sb1.equals(sb2));         // checking if the duplicate is correct or not        System.out.println("are sb2 and sb3 equal: "                           + sb2.equals(sb3));    }}

输出

Original ShortBuffer:  [100, 400, 210, 0, 0, 0, 0, 0, 0, 0]Duplicate ShortBuffer: [100, 400, 210, 0, 0, 0, 0, 0, 0, 0]are sb1 and sb2 equal: trueare sb2 and sb3 equal: false