Java中的 ShortBuffer put(int, short) 方法及示例

Java.nio.ShortBuffer类的put()方法用于在给定索引处将给定的 short 写入此缓冲区。

语法：

public abstract ShortBuffer put(int index, short s)

参数：

• index ：此参数指定将写入短的索引。它是可选的。
• s ：此参数指定要写入的短值

返回值：此方法返回此缓冲区。

例外：

• IndexOutOfBoundsException – 如果 index 为负数或不小于缓冲区的限制。
• ReadOnlyBufferException – 如果此缓冲区是只读的

下面的程序说明了put()方法：

程序 1 ：

// Java program to demonstrate put() method
  
import java.nio.*;
import java.util.*;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // Declaring the capacity of the ShortBuffer
        int capacity = 3;
  
        // Creating the ShortBuffer
        try {
  
            // creating object of shortbuffer
            // and allocating size capacity
            ShortBuffer sb
                = ShortBuffer.allocate(capacity);
  
            // putting the value in shortbuffer
            // using put() at index 0
            sb.put(0, (short)400);
  
            // putting the value in shortbuffer
            // using put() at index 2
            sb.put(2, (short)1000);
  
            // putting the value in shortbuffer
            // using put() at index 1
            sb.put(1, (short)30);
  
            // rewinding the shortbuffer
            sb.rewind();
  
            // print the ShortBuffer
            System.out.println("Original ShortBuffer: "
                               + Arrays.toString(sb.array()));
        }
  
        catch (IndexOutOfBoundsException e) {
  
            System.out.println("Exception throws: " + e);
        }
  
        catch (ReadOnlyBufferException e) {
  
            System.out.println("Exception throws: " + e);
        }
    }
}

输出：

Original ShortBuffer: [400, 30, 1000]

方案二：
演示IndexOutOfBoundsException。

// Java program to demonstrate put() method
  
import java.nio.*;
import java.util.*;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // Declaring the capacity of the ShortBuffer
        int capacity = 3;
  
        // Creating the ShortBuffer
        try {
  
            // creating object of shortbuffer
            // and allocating size capacity
            ShortBuffer sb
                = ShortBuffer.allocate(capacity);
  
            // putting the value in shortbuffer
            // using put() at index 0
            sb.put(0, (short)31);
  
            // putting the value in shortbuffer
            // using put() at index 2
            sb.put(2, (short)49);
  
            // putting the value in shortbuffer
            // using put() at index -1
            System.out.println("Trying to put the value"
                               + " at the negative index");
            sb.put(-1, (short)27);
        }
  
        catch (IndexOutOfBoundsException e) {
  
            System.out.println("Exception throws: " + e);
        }
  
        catch (ReadOnlyBufferException e) {
  
            System.out.println("Exception throws: " + e);
        }
    }
}

输出：

Trying to put the value at the negative index
Exception throws: java.lang.IndexOutOfBoundsException

程序 3 ：演示 ReadOnlyBufferException。

// Java program to demonstrate put() method
  
import java.nio.*;
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Declaring the capacity of the ShortBuffer
        int capacity = 3;
  
        // Creating the ShortBuffer
        try {
  
            // creating object of shortbuffer
            // and allocating size capacity
            // using allocate() method
            ShortBuffer sb
                = ShortBuffer.allocate(capacity);
  
            // Creating a read-only copy of ShortBuffer
            // using asReadOnlyBuffer() method
            ShortBuffer sb1 = sb.asReadOnlyBuffer();
  
            System.out.println("Trying to put the float value"
                               + " in read only buffer");
  
            // putting the value in readonly shortbuffer
            // using put() method
            sb1.put(0, (short)13);
        }
  
        catch (BufferOverflowException e) {
  
            System.out.println("Exception throws: " + e);
        }
  
        catch (ReadOnlyBufferException e) {
  
            System.out.println("Exception throws: " + e);
        }
    }
}

输出：

Trying to put the float value in read only buffer
Exception throws: java.nio.ReadOnlyBufferException

参考： https://docs.oracle.com/javase/9/docs/api/ Java/nio/ShortBuffer.html#put-int-short-