java bytebuffer 测试

public static void main(String[] args) {   String str = "helloWorld123";         ByteBuffer buff  = ByteBuffer.wrap(str.getBytes());  //       buff.allocate(100);       System.out.println("position:"+buff.position()+"\t limit:"+buff.limit());         //读取两个字节  getInt()读取4个字节//       System.out.println(buff.getInt());  //       System.out.println((char)buff.get());//       System.out.println((char)buff.get());//       System.out.println((char)buff.get());//       System.out.println("position:"+buff.position()+"\t limit:"+buff.limit());   //       buff.mark();       System.out.print((char)buff.get());       System.out.print((char)buff.get());       System.out.print((char)buff.get());       System.out.print((char)buff.get());       System.out.print((char)buff.get());       System.out.print((char)buff.get());       System.out.print((char)buff.get());       System.out.print((char)buff.get());       System.out.print((char)buff.get());//       buff.rewind();//       buff.clear();       System.out.println("position:"+buff.position()+"\t limit:"+buff.limit());        buff.compact();       System.out.println("____");       System.out.println("position:"+buff.position()+"\t limit:"+buff.limit());        buff.position(0);       System.out.print((char)buff.get());       System.out.print((char)buff.get());       System.out.print((char)buff.get());       System.out.print((char)buff.get());       System.out.print((char)buff.get());       System.out.print((char)buff.get());       System.out.print((char)buff.get());       System.out.print((char)buff.get());       System.out.println("____");//       System.out.println("position:"+buff.position()+"\t limit:"+buff.limit());       buff.clear();         System.out.print((char)buff.get());       System.out.println("position:"+buff.position()+"\t limit:"+buff.limit());//       System.out.println(buff.order());    //       buff.reset();//清除标记       System.out.println("position:"+buff.position()+"\t limit:"+buff.limit());}


结果：
position:0 limit:13helloWorlposition:9 limit:13____position:4 limit:13d123oWor____dposition:1 limit:13position:1 limit:13

可以看出compact()方法是将position到limit后面的所有字符串复制到buff最前面，同时postion设置为（所复制串长度－1）
	
				
	
					   
java bytebuffer 测试
	  	   
java bytebuffer
	  	   
java ByteBuffer
	  	   
java ByteBuffer
	  	   
java byteBuffer 的学习
	  	   
java.nio.ByteBuffer 类
	  	   
java.nio.ByteBuffer  详解
	  	   
java.nio.ByteBuffer类
	  	   
Java ByteBuffer用法总结
	  	   
java.nio.ByteBuffer 详解 .
	  	   
Java ByteBuffer用法
	  	   
Java nio ByteBuffer用法
	  	   
Java ByteBuffer用法总结
	  	   
java中的ByteBuffer
	  	   
Java ByteBuffer 使用实例
	  	   
Java NIO ByteBuffer图解
	  	   
Java 学习系列：ByteBuffer
	  	   
Java之ByteBuffer详解
	     		  
	  	   
Mysql  添加字段 性能与锁机制测试。
	  	   
关于分析网页的工具
	  	   
编程随笔
	  	   
Oracle Logical Replication install check scripts
	  	   
CAN 通信引脚
	  	   
java bytebuffer 测试
	  	   
File_operations 介绍
	  	   
重温Java中抽象类和接口的区别
	  	   
PHP发送邮件之头头是道完全释疑
	  	   
Java 项目中如何使用异常
	  	   
iPhone程序中图片延时加载
	  	   
mahout概述
	  	   
[小说]魔王冢(34)卢瑶瑶
	  	   
引擎开发学习