Java ShortBuffer isDirect()方法及示例

java.nio.ShortBuffer 的 isDirect() 方法用于检查这个短缓冲区是否是直接的。

语法:

public abstract boolean isDirect()

返回值 ：当且仅当该缓冲区是直接的，该方法返回真。

下面的程序说明了 isDirect() 方法的使用。

程序1 :

// Java program to demonstrate// isDirect() method  import java.nio.*;import java.util.*;  public class GFG {    public static void main(String[] args)    {          short[] array = { 10000, 10640, 10189, -2000, -16780 };          // creating short array        ShortBuffer shortBuf1 = ShortBuffer.wrap(array);          // checking if the array is Direct or not        if (shortBuf1.isDirect()) {            System.out.println("Short buffer is direct.");        }        else {            System.out.println("Short buffer is not direct.");        }    }}

输出:

Short buffer is not direct.

程序2 :

// Java program to demonstrate// isDirect() method  import java.nio.*;import java.util.*;  public class GFG {    public static void main(String[] args)    {          ByteBuffer b = ByteBuffer.allocateDirect(512);          ShortBuffer shortBuf = b.asShortBuffer();          // checking if the array is Direct or not        if (shortBuf.isDirect()) {            System.out.println("Short buffer is direct.");        }        else {            System.out.println("Short buffer is not direct.");        }    }}

输出:

Short buffer is direct.

参考资料: https://docs.oracle.com/javase/9/docs/api/java/nio/ShortBuffer.html#isDirect-