import java.io.*;

public class DataOutputExample {
    public static void main(String[] args) {
        // 创建输出流
        try {
            FileOutputStream fileOutputStream = new FileOutputStream("output.dat");
            DataOutputStream dataOutputStream = new DataOutputStream(fileOutputStream);

            // 写入数据
            int intValue = 42;
            double doubleValue = 3.14;
            String stringValue = "Hello, HarmonyOS!";

            dataOutputStream.writeInt(intValue);
            dataOutputStream.writeDouble(doubleValue);
            dataOutputStream.writeUTF(stringValue);

            // 关闭流
            dataOutputStream.close();

            // 读取数据验证
            FileInputStream fileInputStream = new FileInputStream("output.dat");
            DataInputStream dataInputStream = new DataInputStream(fileInputStream);

            int readIntValue = dataInputStream.readInt();
            double readDoubleValue = dataInputStream.readDouble();
            String readStringValue = dataInputStream.readUTF();

            // 打印读取的数据
            System.out.println("Read int value: " + readIntValue);
            System.out.println("Read double value: " + readDoubleValue);
            System.out.println("Read string value: " + readStringValue);

            // 关闭流
            dataInputStream.close();

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}