Java metod parametrlari

Parametrlar va argumentlar

Ma’lumotlarni metodlarga parametr sifatida uzatish mumkin. Parametrlar metod ichida o‘zgaruvchi vazifasini bajaradi.

Parametrlar metod nomidan keyin, qavslar ichida ko‘rsatiladi. Xohlagancha parametr qo‘shishingiz mumkin, faqat ularni vergul bilan ajrating.

Quyidagi misolda parametr sifatida fname nomli String qabul qiladigan metod bor. Metod chaqirilganda biz ism uzatamiz va u metod ichida to‘liq ismni chiqarish uchun ishlatiladi:

public class Main {
  static void myMethod(String fname) {
    System.out.println(fname + " Refsnes");
  }

  public static void main(String[] args) {
    myMethod("Liam");
    myMethod("Jenny");
    myMethod("Anja");
  }
}
// Liam Refsnes
// Jenny Refsnes
// Anja Refsnes

Bir nechta parametr

Xohlagancha parametrga ega bo‘lishingiz mumkin:

public class Main {
  static void myMethod(String fname, int age) {
    System.out.println(fname + " is " + age);
  }

  public static void main(String[] args) {
    myMethod("Liam", 5);
    myMethod("Jenny", 8);
    myMethod("Anja", 31);
  }
}

// Liam is 5
// Jenny is 8
// Anja is 31

If...Else ishlatilgan metod

Metodlar ichida if...else operatorlaridan foydalanish keng tarqalgan:

public class Main {

  // Create a checkAge() method with an integer variable called age
  static void checkAge(int age) {

    // If age is less than 18, print "access denied"
    if (age < 18) {
      System.out.println("Access denied - You are not old enough!");

    // If age is greater than, or equal to, 18, print "access granted"
    } else {
      System.out.println("Access granted - You are old enough!");
    }

  }

  public static void main(String[] args) {
    checkAge(20); // Call the checkAge method and pass along an age of 20
  }
}

// Outputs "Access granted - You are old enough!"