CODEWITHSUNDEEP
java
delsa
delsa

Reputation: 183

how can I define a default constructor while I have other constructors?

I have a class in Java. This class has a constructor like below:

public Person(String first, String last) {
    firstName = new SimpleStringProperty(first);
    lastName = new SimpleStringProperty(last);
    city = new SimpleStringProperty("Tehran");
    street = new SimpleStringProperty("Vali Asr");
    postalCode = new SimpleStringProperty("23456");
    birthday = new SimpleStringProperty("12345");
}

Now I want to declare a constructor like below:

public Person() {
    Person(null, null);
}

But it gives me an error. What can I do? Thanks

Upvotes: 1

Views: 122

Answers (1)

Nicolas Filotto
Nicolas Filotto

Reputation: 44965

Calling Person(null, null) doesn't work because a constructor is not a method so it cannot be called like a method as you are trying to do. What you need to do is rather to call this(null, null) to invoke the other constructor as next:

public Person() {
    this(null, null); // this(...) like super(...) is only allowed if it is 
                      // the first instruction of your constructor's body
}

public Person(String first, String last) {
    ...
}

More details about the keyword this here.

Upvotes: 10

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