Recipe 3.14 Creating a Constructor

     

3.14.1 Problem

You want Eclipse to add a constructor to a class, including a call to the superclass's constructor.

3.14.2 Solution

Select Source Add Constructor from Superclass.

3.14.3 Discussion

For example, if you have this code:

 public class DisplayApp {     static String text = "No problem.";          public static void main(String[] args)     {         System.out.println(text);     } } 

and you select Source Add Constructor from Superclass, Eclipse will give you this:

 public class DisplayApp {     static String text = "No problem.";          /**      *       */  public DisplayApp( ) {   super( );   // TODO Auto-generated constructor stub   }  public static void main(String[] args)     {         System.out.println(text);     } } 

You also can create constructors automatically when you create a class.

3.14.3.1 Eclipse 3.0

In Eclipse 3.0, you can create a constructor that will assign values to one or more fields. Select Source Generate Constructor using Fields, opening the dialog shown in Figure 3-15.

Figure 3-15. Creating a constructor that will fill fields

Selecting the two String fields, text and message , creates this constructor:

 public DisplayApp(String text, String message) {     super( );     this.text = text;     this.message = message; } 

3.14.4 See Also

Chapter 2 of Eclipse (O'Reilly).