//09 Syntax:Method/Function

public class Method_Fuction {
  public static void main(String[] args) {
  Print();
  }
//Method
 static void Print() {
  System.out.println("I just got executed!");
  }
}

//09 Syntax:Method/Function:parameters

public class Parameters {
  public static void main(String[] args) {
  fun1("Liam", 5);
  fun1("Jenny", 8);
  fun1("Anja", 31);
  }
 static void fun1(String fname, int age) {
  System.out.println(fname + " is " + age);
  }
}

//09 Syntax:Method/Function:parameters// return value

public class Parameters {
  public static void main(String[] args) {
  System.out.println(myMethod(3));
  }
 static int myMethod(int x) {
  return 5 + x;
  }
}

//09 Syntax:Method/Function:parameters// return value

public class Parameters {
public static void main(String[] args) {
  System.out.println(myMethod(5, 3));
  }
static int myMethod(int x, int y) {
  return x + y;
  }
}

//09 Syntax:Method/Function:parameters// if-else

public class Parameters {
  public static void main(String[] args) {
  checkAge(20);
  }
static void checkAge(int age) {
  if (age < 18) {
      System.out.println("Noty Ho raha B**** ke L****");
  } else {
    System.out.println("kunDi mat khaDkao raja seedha andar aao raja..");
  }
  }
}

//09 Syntax:Method/Function:Overloading

public class Overloading {
  public static void main(String[] args) {
  System.out.println(plusMethod(6, 8));
  System.out.println(plusMethod(4.3, 9.2));
  }
static int plusMethod(int x, int y) {
  return x + y;
}
  static double plusMethod(double x, double y) {
  return x + y;
}
}

//09 Syntax:Method/Function:Recursion

public class Fibonnaci{
  public static void main(String[] args){
     int N=10;
     System.out.print(n1+","+n2);
     pfibonnaci(N-2);
  }
    static int n1=0,n2=1,ns;
  static void pfibonnaci(int N){
      if(N>0){
          ns=n1+n2;
          n1=n2;
          n2=ns;
          System.out.print(","+ns);
          pfibonnaci(N-1);
      }
}
}

//10 Syntax:OOPS:Class and Obj

public class Java_C_O{
  public static void main(String[] args){
     Java_C_O obj1 = new Java_C_O();
     Java_C_O obj2 = new Java_C_O();
     System.out.println(obj1.x);
     System.out.println(obj2.y);
  }
 int x = 5, y=10;
}

//10 Syntax:OOPS:Class methods

public class Main {
  public static void main(String[] args) {
  myStaticMethod(); // Call the static method
  Main myObj = new Main(); // Create an object of Main
  myObj.myPublicMethod(); // Call the public method on the object
  }

  static void myStaticMethod() {
  System.out.println("Static methods can be called without creating objects");
  }
  public void myPublicMethod() {
  System.out.println("Public methods must be called by creating objects");
  }
}

//10 Syntax:OOPS:Class Constructors

public class Main {
  public static void main(String[] args) {
  Main myCar = new Main(1969, "Mustang");
  System.out.println(myCar.modelYear + " " + myCar.modelName);
  }

  int modelYear;
  String modelName;

  public Main(int year, String name) {
  modelYear = year;
  modelName = name;
  }

}

//10 Syntax:OOPS:Encapsulation

public class Person {
  public static void main(String[] args) {
  Person myObj = new Person();
  myObj.setName("John"); // Set the value of the name variable to "John"
  System.out.println(myObj.getName());
  }

  private String name; // private = restricted access
  // Getter
  public String getName() {
  return name;
  }
  // Setter
  public void setName(String newName) {
  this.name = newName;
  }
}

//11 Syntax:Enums

public class Main {
  public static void main(String[] args) {
  Level myVar = Level.Mid;
  System.out.println(myVar);
  }

  enum Level {
  Max,
  Mid,
  Min
  }
}

//12 Syntax:user input

import java.util.Scanner;

class Main {
  public static void main(String[] args) {
  Scanner Obj = new Scanner(System.in);

  System.out.println("Enter name, age and salary:");
  String name = Obj.nextLine();
  int age = Obj.nextInt();
  double salary = Obj.nextDouble();
  System.out.println("Name: " + name);
  System.out.println("Age: " + age);
  System.out.println("Salary: " + salary);
  }
}

//13 Syntax:Exception handling

public class Main {
  public static void main(String[ ] args) {
  try {
    int[] myNumbers = {1, 2, 3};
    System.out.println(myNumbers[10]);
  } catch (Exception e) {
    System.out.println("Oh No...");
  }
  }
}

//13 Syntax:Exception handling 02

public class Main {
  public static void main(String[ ] args) {
  try {
    int[] myNumbers = {1, 2, 3};
    System.out.println(myNumbers[10]);
  } catch (Exception e) {
    System.out.println("Oh No...");
  } finally {
    System.out.println("I will run whatever happen.");
  }
  }
}

//13 Syntax:Exception handling 03

public class Main {
  public static void main(String[ ] args) {
  throw new ArithmeticException("Access denied ");
  }
//No Output only a error Msg will be shown
}

Exception in thread "main" java.lang.ArithmeticException: Access denied at Main.main(Main.java:3)

Output of 13 Syntax:Exception handling 03

//14 Syntax:File Create / write

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class CreateFile {
  public static void main(String[] args) {
  try {
    File Obj = new File("Give Location where to create File");
    if (Obj.createNewFile()) {
      System.out.println("File created: " + Obj.getName());
    FileWriter MWriter = new FileWriter("give Location of file which to write");
    MWriter.write("What am I writting");
    MWriter.close();
     System.out.println("Successfully wrote to the file.");
    } else {
      System.out.println("File already exists.");
    }
  } catch (IOException e) {
    System.out.println("An error occurred.");
    e.printStackTrace();
  }
  }
}
//Note This code can only run in Your PC

Output:
File created: test.txt
Successfully wrote to the file

Output of 14 Syntax:File Create / write

//14 Syntax:File Read / Info

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class ReadFile {
  public static void main(String[] args) {
    File Obj = new File("Location of text File");
        if (Obj.exists()) {
        System.out.println("File name: " + Obj.getName());
        System.out.println("Absolute path: " + Obj.getAbsolutePath());
        System.out.println("Writeable: " + Obj.canWrite());
        System.out.println("Readable " + Obj.canRead());
        System.out.println("File size in bytes " + Obj.length());
       }
        else {
        System.out.println("The file does not exist.");
       }
  try {
        File ObjR = new File("Location of text file");
        Scanner MReader = new Scanner(ObjR);
        while (MReader.hasNextLine()) {
        String data = MReader.nextLine();
          System.out.println(data);
        }
    MReader.close();
    }catch (FileNotFoundException e) {
    System.out.println("An error occurred.");
    e.printStackTrace();
  }
  }
 }
//Note This code can only run in Your PC