Java CharBuffer order()方法及示例

java.nio.CharBuffer 类的 order() 方法是用来检索这个缓冲区的字节顺序。通过分配或包装现有的char数组而创建的char缓冲区的字节顺序是底层硬件的本地顺序。作为一个字节缓冲区的视图创建的char缓冲区的字节顺序是视图创建时的字节缓冲区的字节顺序。

语法

public abstract ByteOrder order()

返回值： 该方法返回该缓冲区的字节顺序。

以下是说明order()方法的例子：

例子 1 :

// Java program to demonstrate
// order() method
 
import java.nio.*;
import java.util.*;
 
public class GFG {
 
    public static void main(String[] args)
    {
        // creating object of CharBuffer
        // and allocating size capacity
        CharBuffer cb
            = CharBuffer.allocate(4);
 
        // append the int value in the charbuffer
        cb.append('a')
            .append('b')
            .append('c')
            .append('d');
 
        // rewind the Bytebuffer
        cb.rewind();
 
        // Retrieve the ByteOrder
        // using order() method
        ByteOrder order = cb.order();
 
        // print the char buffer and order
        System.out.println("CharBuffer is : "
                           + Arrays.toString(cb.array())
                           + "\nOrder: " + order);
    }
}

输出

CharBuffer is : [a, b, c, d]
Order: LITTLE_ENDIAN

例子 2 :

// Java program to demonstrate
// order() method
 
import java.nio.*;
import java.util.*;
 
public class GFG {
 
    public static void main(String[] args)
    {
        // creating object of CharBuffer
        // and allocating size capacity
        CharBuffer cb = CharBuffer.allocate(4);
 
        // Retrieve the ByteOrder
        // using order() method
        ByteOrder order = cb.order();
 
        // print the char buffer and order
        System.out.println("CharBuffer is : "
                           + Arrays.toString(cb.array())
                           + "\nOrder: " + order);
    }
}

输出

CharBuffer is : [,,,  ]
Order: LITTLE_ENDIAN

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