文件的读写2

package p10;

import java.io.IOException;
import java.io.RandomAccessFile;

/**
 * RAf提供了方便读写基本类型数据的方法
 * @author Administrator
 *
 */
public class after {

	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		RandomAccessFile raf
			=new RandomAccessFile("d:/hao.txt", "rw");
			/*
			 * 向文件中写入一个int最大值
			 * 原型：write(byte b)
			 */
			int max=Integer.MAX_VALUE;
			//写入max,每次写入一个字节
			raf.write(max>>>24);
			raf.write(max>>>16);
			raf.write(max>>>8);
			raf.write(max);
			//
			raf.writeInt(98);
			raf.writeDouble(98.1);
			raf.writeLong(198l);
			raf.writeChar('q');
			raf.writeChars("hellop");//字符间有空格
			raf("xutaoXutAO".getBytes());//没空格
			raf.close();
			//api
			
			RandomAccessFile raf2
			=new RandomAccessFile("d:/hao.txt", "rw");
			/*
			 * long getFilePointer()/0,1,2,3
			 */
			raf2.readInt();
			System.out.println(raf2.getFilePointer());
			//移动指针
			raf2.seek(3);//指向第四个字节
			System.out.println(raf2.read());//读取一个字节转换成int
	}
}