Java中的 ByteBuffer putShort() 方法及示例
putShort（整数值）
Java.nio.ByteBuffer类的putShort(int value)方法用于将包含给定 short 值的两个字节以当前字节顺序写入该缓冲区的当前位置，然后将该位置加 2。
句法：
public abstract ByteBuffer putShort(short value)参数：此方法采用要写入的短值。
返回值：此方法返回此缓冲区。
异常：此方法抛出以下异常：
- BufferOverflowException-如果此缓冲区的当前位置不小于其限制
- ReadOnlyBufferException-如果此缓冲区是只读的
以下是说明 putShort(short value) 方法的示例：
示例 1：
// Java program to demonstrate
// putShort() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the ByteBuffer
int capacity = 6;
// Creating the ByteBuffer
try {
// creating object of ByteBuffer
// and allocating size capacity
ByteBuffer bb = ByteBuffer.allocate(capacity);
// putting the value in ByteBuffer
// using putShort() method
bb.putShort((short)0x041A)
.putShort((short)0x042A)
.putShort((short)0x043A)
.rewind();
// print the ByteBuffer
System.out.print("Original ByteBuffer: [ ");
for (int i = 1; i <= capacity / 2; i++)
System.out.print(bb.getShort() + " ");
System.out.print("]");
}
catch (BufferOverflowException e) {
System.out.println("Exception throws : " + e);
}
catch (ReadOnlyBufferException e) {
System.out.println("Exception throws : " + e);
}
}
}
输出：
Original ByteBuffer: [ 1050 1066 1082 ]
示例 2：演示 BufferOverflowException。
// Java program to demonstrate
// putShort() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the ByteBuffer
int capacity = 6;
// Creating the ByteBuffer
try {
// creating object of ByteBuffer
// and allocating size capacity
ByteBuffer bb = ByteBuffer.allocate(capacity);
// putting the value in ByteBuffer
// using putShort() method
bb.putShort((short)0x041A)
.putShort((short)0x042A)
.putShort((short)0x043A)
.rewind();
// print the ByteBuffer
System.out.print("Original ByteBuffer: [ ");
for (int i = 1; i <= capacity / 2; i++)
System.out.print(bb.getShort() + " ");
System.out.print("]");
// putting the value in ByteBuffer
// using putInt() method
bb.putShort((short)234);
}
catch (BufferOverflowException e) {
System.out.println("\n\nbuffer's current position"
+ " is not smaller than its limit");
System.out.println("Exception throws : " + e);
}
catch (ReadOnlyBufferException e) {
System.out.println("Exception throws : " + e);
}
}
}
输出：
Original ByteBuffer: [ 1050 1066 1082 ]
buffer's current position is not smaller than its limit
Exception throws : java.nio.BufferOverflowException
示例 3：演示 ReadOnlyBufferException。
// Java program to demonstrate
// putShort() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the ByteBuffer
int capacity = 6;
// Creating the ByteBuffer
try {
// creating object of ByteBuffer
// and allocating size capacity
ByteBuffer bb = ByteBuffer.allocate(capacity);
// putting the value in ByteBuffer
// using putShort() method
bb.putShort((short)0x041A)
.putShort((short)0x042A)
.putShort((short)0x043A)
.rewind();
// print the ByteBuffer
System.out.print("Original ByteBuffer: [ ");
for (int i = 1; i <= capacity / 2; i++)
System.out.print(bb.getShort() + " ");
System.out.print("]");
// Creating a read-only copy of ByteBuffer
// using asReadOnlyBuffer() method
ByteBuffer bb1 = bb.asReadOnlyBuffer();
System.out.println("\n\nTrying to put the short value"
+ " in read-only buffer");
// putting the value in readonly ByteBuffer
// using putShort() method
bb1.putShort((short)234);
}
catch (BufferOverflowException e) {
System.out.println("\n\nbuffer's current position"
+ " is not smaller than its limit");
System.out.println("Exception throws : " + e);
}
catch (ReadOnlyBufferException e) {
System.out.println("Exception throws : " + e);
}
}
}
输出：
Original ByteBuffer: [ 1050 1066 1082 ]
Trying to put the short value in read only buffer
Exception throws : java.nio.ReadOnlyBufferException
putShort（整数索引，短值）
Java.nio.ByteBuffer 类的putShort(int index, short value)方法用于将包含给定两个值的两个字节以当前字节顺序写入该缓冲区中给定索引处。
句法：
public abstract ByteBuffer putShort(int index, short value)参数：此方法采用以下参数作为参数：
- index ：将写入字节的索引
- value : 要写入的短值
返回值：此方法返回此缓冲区。
异常：此方法抛出以下异常：
- 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
以下是说明 putShort(int index, short value) 方法的示例：
示例 1：
// Java program to demonstrate
// putShort() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the ByteBuffer
int capacity = 6;
// Creating the ByteBuffer
try {
// creating object of ByteBuffer
// and allocating size capacity
ByteBuffer bb = ByteBuffer.allocate(capacity);
// putting the value in ByteBuffer
// using putShort() at index 0
bb.putShort(0, (short)23);
// putting the value in ByteBuffer
// using putShort() at index 2
bb.putShort(2, (short)34);
// putting the value in ByteBuffer
// using putShort() at index 4
bb.putShort(4, (short)27);
// rewinding the ByteBuffer
bb.rewind();
// print the ByteBuffer
System.out.print("Original ByteBuffer: [ ");
for (int i = 1; i <= capacity / 2; i++)
System.out.print(bb.getShort() + " ");
System.out.print("]\n");
}
catch (IndexOutOfBoundsException e) {
System.out.println("Exception throws : " + e);
}
catch (ReadOnlyBufferException e) {
System.out.println("Exception throws : " + e);
}
}
}
输出：
Original ByteBuffer: [ 23 34 27 ]
示例 2：演示 IndexOutOfBoundsException。
// Java program to demonstrate
// putShort() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the ByteBuffer
int capacity = 6;
// Creating the ByteBuffer
try {
// creating object of ByteBuffer
// and allocating size capacity
ByteBuffer bb = ByteBuffer.allocate(capacity);
// putting the value in ByteBuffer
// using putShort() at index 0
bb.putShort(0, (short)23);
// putting the value in ByteBuffer
// using putShort() at index 2
bb.putShort(2, (short)34);
// putting the value in ByteBuffer
// using putShort() at index 4
bb.putShort(4, (short)27);
// rewinding the ByteBuffer
bb.rewind();
// print the ByteBuffer
System.out.print("Original ByteBuffer: [ ");
for (int i = 1; i <= capacity / 2; i++)
System.out.print(bb.getShort() + " ");
System.out.print("]\n");
// putting the value in ByteBuffer
// using putShort() at index -1
bb.putShort(-1, (short)45);
}
catch (IndexOutOfBoundsException e) {
System.out.println("\nindex is negative or not smaller "
+ "than the buffer's limit");
System.out.println("Exception throws : " + e);
}
catch (ReadOnlyBufferException e) {
System.out.println("Exception throws : " + e);
}
}
}
输出：
Original ByteBuffer: [ 23 34 27 ]
index is negative or not smaller than the buffer's limit
Exception throws : java.lang.IndexOutOfBoundsException
示例 3：演示 ReadOnlyBufferException。
// Java program to demonstrate
// putShort() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the ByteBuffer
int capacity = 6;
// Creating the ByteBuffer
try {
// creating object of ByteBuffer
// and allocating size capacity
ByteBuffer bb = ByteBuffer.allocate(capacity);
// Creating a read-only copy of ByteBuffer
// using asReadOnlyBuffer() method
ByteBuffer bb1 = bb.asReadOnlyBuffer();
System.out.println("Trying to put the int value"
+ " in read-only buffer");
// putting the value in readonly ByteBuffer
// using putInt() method
bb1.putInt(0, 23);
}
catch (IndexOutOfBoundsException e) {
System.out.println("Exception throws : " + e);
}
catch (ReadOnlyBufferException e) {
System.out.println("Exception throws : " + e);
}
}
}
输出：
Trying to put the int value in read only buffer
Exception throws : java.nio.ReadOnlyBufferException
参考：
- https://docs.oracle.com/javase/9/docs/api/ Java/nio/ByteBuffer.html#putShort-short-
- https://docs.oracle.com/javase/9/docs/api/ Java/nio/ByteBuffer.html#putShort-int-short-