java学习笔记|输入输出流(二)

//public ObjectInputStream(InputStream in)
//从文件中读取对象
FileInputStream a= new FileInputStream("tom.txt");
ObjectInputStream in = new ObjectInputStream(a);

//public ObjectOutputStream(OutputStream out)
//将对象写入到文件中
FileOutputStream b = new FileOutputStream("tom.txt");
ObjectOutputStream out = new ObjectOutputStream(b);

//类的读方法
public final Object readObject() throws IOException, ClassNotFoundException
//类的写方法
public final void writeObject(Object obj) throws IOException

public RandomAccessFile(String name, String mode) throws FileNotFoundException
public RandomAccessFile(File file, String mode) throws FileNotFoundException
//mode 取值：“r”以只读的方式打开文件；“rw”以读写的方式打开文件

//返回当前的文件指针
public long getFilePointer() throws IOException
//把文件指针置于给出的位置POS
public void seek(long pos) throws IOException
//返回文件长度
public long length() throws IOException
//从当前位置开始跳过n个字节
public int skipBytes(int n) throws IOException