将整数写入流

import java.io.FileOutputStream;
import java.io.IOException;

public class WriteIntegerToFile {
    public static void main(String[] args) {
        int number = 12345;
        try (FileOutputStream fos = new FileOutputStream("output.bin")) {
            fos.write(number & 0xFF); // 写入最低字节
            fos.write((number >> 8) & 0xFF); // 写入次低字节
            fos.write((number >> 16) & 0xFF); // 写入次高字节
            fos.write((number >> 24) & 0xFF); // 写入最高字节
            System.out.println("整数已成功写入文件。");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class WriteIntegerToFile {
    public static void main(String[] args) {
        int number = 12345;
        try (DataOutputStream dos = new DataOutputStream(new FileOutputStream("output.bin"))) {
            dos.writeInt(number);
            System.out.println("整数已成功写入文件。");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}