import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class BufferedReaderExample {
    public static void main(String[] args) {
        try (BufferedReader reader = new BufferedReader(new FileReader("example.txt"))) {
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;

public class BufferedWriterExample {
    public static void main(String[] args) {
        try (BufferedWriter writer = new BufferedWriter(new FileWriter("example.txt"))) {
            writer.write("Hello, World!");
            writer.newLine();
            writer.write("This is an example of BufferedWriter.");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

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

public class InputStreamExample {
    public static void main(String[] args) {
        try (InputStream inputStream = new FileInputStream("example.bin")) {
            int data;
            while ((data = inputStream.read()) != -1) {
                System.out.print((char) data);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

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

public class OutputStreamExample {
    public static void main(String[] args) {
        try (OutputStream outputStream = new FileOutputStream("example.bin")) {
            String data = "Hello, World!";
            outputStream.write(data.getBytes());
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import java.util.*;

public class ListExample {
    public static void main(String[] args) {
        List<String> list = new ArrayList<>(Arrays.asList("one", "two", "three", "four", "five"));
        list.add(2, "zero");
        list.remove("four");
        list.set(3, "ten");
        Collections.sort(list, Comparator.reverseOrder());
        
        for (String s : list) {
            System.out.print(s + " ");
        }
    }
}

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

public class BufferedInputStreamExample {
    public static void main(String[] args) {
        try (InputStream inputStream = new BufferedInputStream(new FileInputStream("example.bin"))) {
            int data;
            while ((data = inputStream.read()) != -1) {
                System.out.print((char) data);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

public class BufferedOutputStreamExample {
    public static void main(String[] args) {
        try (OutputStream outputStream = new BufferedOutputStream(new FileOutputStream("example.bin"))) {
            String data = "Hello, World!";
            outputStream.write(data.getBytes());
            outputStream.flush();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

    public static void bubbleSort(int[] numbers) {
  
        int n = numbers.length;
        int temp = 0;
  
        for (int i = 0; i < n; i++) {
            for (int j = 1; j < (n - i); j++) {
  
                if (numbers[j - 1] > numbers[j]) {
                    //swap elements
                    temp = numbers[j - 1];
                    numbers[j - 1] = numbers[j];
                    numbers[j] = temp;
                }
            }
        }
    }

    public static void shakerSort(int arr[]) {
        int buff;
        int left = 0;
        int right = arr.length - 1;
        do {
            for (int i = left; i < right; i++) {
                if (arr[i] > arr[i + 1]) {
                    buff = arr[i];
                    arr[i] = arr[i + 1];
                    arr[i + 1] = buff;
                }
            }
            right--;
            for (int i = right; i > left; i--) {
                if (arr[i] < arr[i - 1]) {
                    buff = arr[i];
                    arr[i] = arr[i - 1];
                    arr[i - 1] = buff;
                }
            }
            left++;
        } while (left < right);

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Serializable;

class Person implements Serializable {
    private static final long serialVersionUID = 1L;
    private String name;
    private int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    @Override
    public String toString() {
        return "Person{name='" + name + "', age=" + age + '}';
    }
}

public class ObjectOutputStreamExample {
    public static void main(String[] args) {
        Person person = new Person("John Doe", 30);

        try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("person.ser"))) {
            oos.writeObject(person);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

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

public class ObjectInputStreamExample {
    public static void main(String[] args) {
        try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream("person.ser"))) {
            Person person = (Person) ois.readObject();
            System.out.println(person);
        } catch (IOException | ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}

public class VariableTypesExample {
    static int classVariable = 10; // Class variable
    
    public static void main(String[] args) {
        int localVariable = 5; // Local variable
        VariableTypesExample example = new VariableTypesExample();
        example.instanceMethod();
        staticMethod();
        
        System.out.println("Class Variable: " + classVariable);
        System.out.println("Local Variable: " + localVariable);
        System.out.println("Instance Variable: " + example.instanceVariable);
    }
    
    int instanceVariable = 20; // Instance variable
    
    void instanceMethod() {
        classVariable = 15;
        instanceVariable = 25;
    }
    
    static void staticMethod() {
        classVariable = 30;
    }
}