الإدخال الثنائي (Binary I/O)

المصدر → InputStream → البرنامج
البرنامج → OutputStream → الهدف

import java.io.FileInputStream;
import java.io.IOException;

try (FileInputStream fis = new FileInputStream("image.dat")) {
    int byteVal;
    while ((byteVal = fis.read()) != -1) {
        // معالجة كل byte
    }
}

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

try (FileOutputStream fos = new FileOutputStream("output.dat")) {
    fos.write(72);  // H
    fos.write(101); // e
    fos.write(108); // l
    fos.write(108); // l
    fos.write(111); // o
}

import java.io.*;

try (BufferedInputStream bis = new BufferedInputStream(new FileInputStream("large.dat"));
     BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("copy.dat"))) {
    byte[] buffer = new byte[8192];
    int bytesRead;
    while ((bytesRead = bis.read(buffer)) != -1) {
        bos.write(buffer, 0, bytesRead);
    }
}

import java.io.*;

try (DataOutputStream dos = new DataOutputStream(new FileOutputStream("data.bin"))) {
    dos.writeInt(42);
    dos.writeDouble(3.14);
    dos.writeUTF("مرحبًا");
}

try (DataInputStream dis = new DataInputStream(new FileInputStream("data.bin"))) {
    int i = dis.readInt();        // 42
    double d = dis.readDouble();  // 3.14
    String s = dis.readUTF();     // "مرحبًا"
}

import java.io.*;

class Student implements Serializable {
    String name;
    int age;
    Student(String name, int age) { this.name = name; this.age = age; }
}

// الكتابة:
try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("student.dat"))) {
    oos.writeObject(new Student("سارة", 22));
}

// القراءة:
try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream("student.dat"))) {
    Student s = (Student) ois.readObject();
    System.out.println(s.name + " - " + s.age);
}

try (BufferedReader br = new BufferedReader(new FileReader("text.txt"))) {
    String line;
    while ((line = br.readLine()) != null) {
        System.out.println(line);
    }
}

try (BufferedWriter bw = new BufferedWriter(new FileWriter("out.txt"))) {
    bw.write("سطر أول");
    bw.newLine();
    bw.write("سطر ثاني");
}