DataOutputStream是用来处理什么类型数据的

FileOutputStream f=new FileOutputStream(new File("sa.txt"));

DataOutputStream do=new DataOutputStream(f);

do.writeUTF("字符串，可包含中文");

do.writeInt(21);

do.writeDouble(32.43);

do.writeBoolean(true);

do.close();f.close();

//同理也有readUTF()、readBoolean()、readDouble()方法来读取相应数据。