如何編寫包含此代碼主函數的類？

Question

public class Soldier 
{ 
    private String soldierName;    
    public void setSoldierName(String name)  
    {            
     SoldierName = name; 
    } 
    public String getSoldierName()   
    {          
     return soldierName;     
    } 
    public void displayMessage() 
    { 
     System.out.printf("The name of \n%s!\n", 
      getSoldierName()); 
    } 
} 

Answer 1

如果你只是希望類有一個main方法，只需將其添加，你會爲任何其他類：

public class Soldier 
{ 
    private String soldierName;    
    public void setSoldierName(String name)  
    {            
     SoldierName = name; 
    } 
    public String getSoldierName()   
    {          
     return soldierName;     
    } 
    public void displayMessage() 
    { 
     System.out.printf("The name of \n%s!\n", 
      getSoldierName()); 
    } 
    public static void main(String args[]) { 
    } 

} 

要真正做一些事情在main有用，您可能希望創建一個例如，在那裏的類的實例，設置士兵名稱，然後調用displayMessage()方法。所以像這樣：

 public static void main(String args[]) { 
     Soldier soldier = new Soldier(); 
     soldier.setSoldierName("John"); 
     soldier.displayMessage(); 
    }