make和rest用法

package com.toov5.Nio;

import java.nio.ByteBuffer;

public class BUfferTest01 {
   
     public static void main(String[] args) {
        ByteBuffer byteBuffer = ByteBuffer.allocate(10); //10个字节
        String str="abcd";
        byteBuffer.put(str.getBytes());
        //开启读模式
        byteBuffer.flip();
        byte[] bytes = new byte[byteBuffer.limit()];
        //缓冲拿到数组
        byteBuffer.get(bytes,0,2);
        byteBuffer.mark(); //做个标记
        System.out.println(new String(bytes,0,2));  //从0到2的位置
        System.out.println(byteBuffer.position());  
        System.out.println("--------------------");
        byteBuffer.reset() ; //还原到标记位置
        byteBuffer.get(bytes,0,2);
        System.out.println(new String(bytes,0,2));
        System.out.println(byteBuffer.position());
    }
    
}