آرایه ها در جاوا: ویژگی ها، استفاده و سناریوهای زندگی واقعی

public class Main {
    public static void main(String[] args) {
        // Stores product quantities
        int[] quantities = new int[4];   
        // Storing product quantities
        quantities[0] = 50;  
        quantities[1] = 30;  
        quantities[2] = 20;  
        quantities[3] = 40;  
        // Prints the product quantities
        for (int i = 0; i < quantities.length; i++) {
            System.out.println("Product " + (i + 1) + " Quantity: " 
                                                            +   quantities[i]);
        }
    }
}

Product 1 Quantity: 50
Product 2 Quantity: 30
Product 3 Quantity: 20
Product 4 Quantity: 40

public class Main {
    public static void main(String[] args) {
        // Stores daily temperatures 
        int[] temperatures = {68, 70, 75, 72, 69, 71, 73};

        // Prints initial temperatures
        System.out.println("Initial daily temperatures:");
        printTemperatures(temperatures);

        // Modifies temperatures
        modifyTemperature(temperatures, 2, 78);
        modifyTemperature(temperatures, 5, 74);

        // Prints updated temperatures
        System.out.println("\nUpdated daily temperatures:");
        printTemperatures(temperatures);
    }

    // Method to print all temperatures
    public static void printTemperatures(int[] temperatures) {
        String[] days = {"Monday", "Tuesday", "Wednesday", "Thursday", 
                         "Friday","Saturday", "Sunday"};
        for (int i = 0; i < temperatures.length; i++) {
            System.out.println(days[i] + ": " + temperatures[i] + "°F");
        }
    }

    // Method to modify a temperature
    public static void modifyTemperature(int[] temperatures, int dayIndex, 
                                                               int newTemperature) {
        if (dayIndex >= 0 && dayIndex < temperatures.length) {
            temperatures[dayIndex] = newTemperature;
        } else {
            System.out.println("Invalid day index!");
        }
    }
}

Initial daily temperatures:
Monday: 68°F
Tuesday: 70°F
Wednesday: 75°F
Thursday: 72°F
Friday: 69°F
Saturday: 71°F
Sunday: 73°F

Updated daily temperatures:
Monday: 68°F
Tuesday: 70°F
Wednesday: 78°F
Thursday: 72°F
Friday: 69°F
Saturday: 74°F
Sunday: 73°F

import java.util.Arrays;public class Main{
    public static void main(String[] args) {
        // Two-dimensional array to store student IDs and their grades
        int[][] studentGrades = {
            {1, 85}, // {Student ID, Grade}
            {2, 90},
            {3, 78},
            {4, 92},
            {5, 88}
        };

        // Prints initial student grades
        System.out.println("Initial student grades:");
        printAllGrades(studentGrades);
        // Sorting grades from lowest to highest
        sortGrades(studentGrades);
        // Printing sorted student grades
        System.out.println("\nSorted student grades:");
        printAllGrades(studentGrades);
    }
    // Prints all grades
    public static void printAllGrades(int[][] studentGrades) {
        for (int i = 0; i < studentGrades.length; i++) {
            System.out.println("Student ID " + studentGrades[i][0] 
                                + ": " + studentGrades[i][1]);
        }
    }
    // Sorts grades 
    public static void sortGrades(int[][] studentGrades) {
        Arrays.sort(studentGrades, (a, b) -> Integer.compare(a[1], b[1]));
    }
}

Initial student grades:
Student ID 1: 85
Student ID 2: 90
Student ID 3: 78
Student ID 4: 92
Student ID 5: 88

Sorted student grades:
Student ID 3: 78
Student ID 1: 85
Student ID 5: 88
Student ID 2: 90
Student ID 4: 92