Java程式範例：一個沒有參數和回傳類型的方法

首先，讓我們熟悉一下語法、範例，然後最後再實現。

Java中的方法非常重要，因為它允許重複使用相同的程式碼，減少程式碼中需要編寫的語句數量。

有三個主要部分的方法，以使其可執行。

• 方法的宣告。

• 方法的定義。

• 呼叫該方法。

方法呼叫是最後一步，而其他兩個步驟可以互換。唯一需要記住的是，在呼叫方法之前必須先聲明它。

Syntax

To create a method without any parameter and return type, the following syntax is considered.

Class class_name{
   function _name() {
      Statement 1;
      Statement 2;
      .
      .
      Statement n;
      //an optional return 
      return;
   }
   Main function() {
      // invoking the above function
      function_name();
   }
}

在一個類別中建立一個空參數列表的方法。方法內部寫入語句，可能會在最後加上一個空的回傳語句。然後在主方法中呼叫這個方法。

Example

下面的程式是為了展示如何建立一個既沒有參數也沒有回傳類型的方法。

A class named Wish is created within which, a method named wish() with return type void is created denoting it does not return any value, is created denoting it does not return any value, also it does not consist of any parameter. A statement is written within the wish()

// Java Program to demonstrate a method without Parameters and Return Type
public class Wish {
	// Declaration and Definition of the method
	public static void wish(){
		System.out.println("Good Morning! Have a nice day");
	}
	public static void main(String args[]){
		// Calling the method without any parameters
		wish ();
	}
}

登入後複製

Good Morning! Have a nice day

登入後複製

A class named Wish is created within which, a method named wish() with return type void is created denoting it does not return any value, is created denoting it does not return any value, also it does not consist of any parameter. The statements written inside the

method are displayed by invoking the method in the main method.

// Java Program to demonstrate a method without Parameters and Return Type
public class Wish {
	// Declaration and Definition of the method
	public static void wish(){
		System.out.println("Congratulations! Have a great professional life");
			//It is optional to use a return statement here.
			return;
	}
	public static void main(String args[]){
		// Calling the method without any parameters
		wish();
	}
}

輸出

Congratulations! Have a great professional life

結論

以上是Java程式範例：一個沒有參數和回傳類型的方法的詳細內容。更多資訊請關注PHP中文網其他相關文章！