DataInputStream、DataOutputStream

数据专属流，可以将数据连同数据的类型一并写入文件 注意：这个文件不是普通文本文档（无法用记事本打开）
DataOutputStream(OutputStream)
DataOutputStream写入的文件只能用DataInputStream读取，并且读的时候顺序需要和写入顺序一致

　　writeByte()　　readByte()

public class Test_07 {
    public static void main(String[] args) {
        DataOutputStream outputStream = null;
        DataInputStream inputStream = null;
        try {
            outputStream = new DataOutputStream(new FileOutputStream("test_03"));
            inputStream = new DataInputStream(new FileInputStream("test_03"));
            byte b = 100;
            short s = 200;
            int i = 300;
            long l = 400L;
            float f = 3.0F;
            double d = 3.14;
            boolean sex = false;
            char c = 'a';
            outputStream.writeByte(b);
            outputStream.writeShort(s);
            outputStream.writeInt(i);
            outputStream.writeLong(l);
            outputStream.writeFloat(f);
            outputStream.writeDouble(d);
            outputStream.writeBoolean(sex);
            outputStream.writeChar(c);
            outputStream.flush();

//            System.out.println(inputStream.readChar());
            System.out.println(inputStream.readByte());
            System.out.println(inputStream.readShort());
            System.out.println(inputStream.readInt());
            System.out.println(inputStream.readLong());
            System.out.println(inputStream.readFloat());
            System.out.println(inputStream.readDouble());
            System.out.println(inputStream.readBoolean());
            System.out.println(inputStream.readChar());

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (outputStream != null) {
                try {
                    outputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}
*测试读取顺序不一样时，读取内容错误