【转】RandomAccessFile种

【转】RandomAccessFile类

转自：http://zhidao.baidu.com/question/322007540.html?fr=qrl&cid=870&index=1&fr2=query

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http://blog.sina.com.cn/s/blog_3ec48433010001en.html

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public class TestIOapp{public static void main(String [] args) throws IOException{RandomAccessFile file = new RandomAccessFile("test.txt","rw");file.writeBoolean(true);file.writeInt(123456);file.writeInt(7890);file.writeLong(1000000);file.writeInt(777);file.writeFloat(.0001f);file.seek(5);System.out.println(file.readInt());}}A.123456B.7890C.1000000D.777E.0001

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解答：

BJava存储机制boolean ＝ 1 字节int = 4字节...seek(int pos) pos为相对于文件开始位置的指针偏移。seek(5)，即为指针移动到第5个字节。readInt()，读取4字节。即一个int