Java 中的 ShortBuffer isDirect()方法，示例

原文:https://www . geesforgeks . org/short buffer-is direct-method-in-Java-with-examples/

Java . nio . short buffer的 isDirect() 方法用于检查这个短缓冲是否是直接的。

语法 :

public abstract boolean isDirect()

返回值:当且仅当该缓冲区为直接时，该方法返回真

以下程序说明了 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.

程序二 :

// 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:https://docs . Oracle . com/javase/9/docs/API/Java/nio/short buffer . html # isDirect–

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