这个压缩包里的都是超级经典的java例子

				
				
				
				Getting and Setting Non-Byte Java Types in a ByteBuffer (Java Developers Almanac Example)
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				The Java Developers Almanac 1.4
				
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				  e162. Getting and Setting Non-Byte Java Types in a ByteBuffer
				
				The ByteBuffer class provides convenience methods for 
				getting and putting other multibyte Java primitive types.
				There are two issues to be aware of when using these methods.
				First, ensure that values will be stored using the desired
				byte ordering;
				see e165 Setting the Byte Ordering for a ByteBuffer for more information.
				
				Second, the hasRemaining() method cannot be used to determine if the
				buffer has room for a multibyte put. If your application needs to
				know this information, see e163 Creating a Non-Byte Java Type Buffer on a ByteBuffer for an example
				that can provide this information.
				
				
				    // Obtain a ByteBuffer; see also e158 Creating a ByteBuffer
				    ByteBuffer buf = ByteBuffer.allocate(100);
				    
				    // Put values of different types
				    buf.putChar((char)123);
				    buf.putShort((short)123);
				    buf.putInt(123);
				    buf.putLong(123L);
				    buf.putFloat(12.3F);
				    buf.putDouble(12.3D);
				    
				    // Reset position for reading
				    buf.flip();
				    
				    // Retrieve the values
				    char c = buf.getChar();
				    short s = buf.getShort();
				    int i = buf.getInt();
				    long l = buf.getLong();
				    float f = buf.getFloat();
				    double d = buf.getDouble();
				
				
				
				
				             Related Examples
				
				
				
				
				e158. 
				    Creating a ByteBuffer
				
				
				
				e159. 
				    Getting Bytes from a ByteBuffer
				
				
				
				e160. 
				    Putting Bytes into a ByteBuffer
				
				
				
				e161. 
				    Converting Between a ByteBuffer an a Byte Array
				
				
				
				e163. 
				    Creating a Non-Byte Java Type Buffer on a ByteBuffer
				
				
				
				e164. 
				    Using a ByteBuffer to Store Strings
				
				
				
				e165. 
				    Setting the Byte Ordering for a ByteBuffer
				
				
				
				
				
				
				
				
				        See also: 
				
				    File Locking
				  
				
				
				    Files
				  
				
				
				    Sockets
				  
				
				
				    Streams
				  
				
				
				
				
				
				
				
				
				
				© 2002 Addison-Wesley.