a0cc31e46436001b1ca5e09d4b3e313e

《ajax编程技术与实例》的所有的案例

package com.bam;


public class Chunk {


	private byte[] data = "".getBytes();
	private byte[] checksum = "".getBytes();
	private int version = 0;
	
	
	Chunk() {
			
	}
	
	public byte[] getData() {
		return data;
	}
	public void setData(byte[] newdata) {
		
		if (ChecksumDifferent(newdata)) {
		  this.data = newdata;
		  version++;
		}
		
	}
	
	public byte[] getChecksum() {
		return checksum;
	}
	
	public int getVersion() {
		return version;
	}
		
	public boolean ChecksumDifferent(byte[] newdata) {
		
	  if (newdata.length != this.data.length) return true;
	
	  // more advanced diff algorithm here.
	  
	  return false;
	  
	}
	
}