使用方法重載來找出矩形面積的Java程序

我們可以用方法來重載在Java中計算矩形的面積。 "方法重載"是Java中的特性，它允許在同一個類別中使用相同的方法名稱來編寫多個方法。這將使我們能夠聲明多個具有相同名稱但具有不同簽章的方法，即方法中的參數數量可能不同或參數的資料類型可能不同。方法重載幫助我們增加程式碼的可讀性，以便我們可以以不同的方式使用相同的方法。

Now, let us achieve Method Overloading in Java by considering the 「area of​​ a rectangle」 as an example.

矩形的面積

Area of​​ a rectangle is defined region occupied by ait in a 2-d plane. We can find the area of​​ rectangle by performing the product of length and breadth of rectangle.

Area of Rectangle = lb
where	 
   l: length of rectangle.
   b: breadth of rectangle

In the below example, we will achieve Method Overloading in Java using the area of​​ a rectangle as an example by changing the data types of parameters.

Algorithm

STEP 1 − Write a custom class to find the area of​​ the rectangle.

STEP 2 − Initialize a pair of two variables of different data types in the main method of the public class.

STEP 3 − Create an object of a custom class in the main method of the public class.

STEP 4 − Call the specific method to find the area of​​ the rectangle using the custom object created.

Example

在這個例子中，我們使用一個基本公式計算矩形的面積，並在Java中實作了方法重載。

方法重載是透過改變「areaOfRectangle」方法中參數的類型來實現的。現在，當使用者將整數類型的參數值作為輸入傳遞給areaOfRectangle方法時，Area類別的第一個areaOfRectangle方法被呼叫並輸出結果。如果使用者輸入的是雙精度類型的參數，則呼叫並執行第二個areaOfRectangle方法。

//Java Code to achieve Method Overloading in Java by Area of Rectangle.
import java.io.*;
class Area {
   // In this example area method is overloaded by changing the type of parameters.
   public void areaOfRectangle(int length, int breadth) {
      int area = 0;
      area = length *breadth;
      System.out.println("Area of the rectangle is :" + area);
   }
   public void areaOfRectangle(double  length, double breadth) {
      double area= 0;
      area = length *breadth;
      System.out.println("Area of the rectangle is:" + area);
   }
}
public class Main {
   public static void main(String args[]) {
      Area Object  = new Area();
      int length_1 = 3;
      int  breadth_1 = 4;
      Object.areaOfRectangle(length_1, breadth_1);
      double length_2 = 4.5;
      double  breadth_2 = 5.5;
      Object.areaOfRectangle(length_2, breadth_2);
   }
}

Output

#

Area of the rectangle is :12
Area of the rectangle is:24.75

Time Complexity: O(1) Auxiliary Space: O(1)

Thus, in this article, we have learned how to implement Method Overloading in Java by changing the datatype of parameters using the example of finding the area of​​ a rectangle.

以上是使用方法重載來找出矩形面積的Java程序的詳細內容。更多資訊請關注PHP中文網其他相關文章！