Question

I would like to know how to execute method, in java, whenever object is created.

for example:

public class Person {
    private String name;
    private int age;
    private Date dateCreated;

    public setName(String name){
    ...
    }
    ... some other methods ...

    public setDateCreated(){
         this.dateCreated = new Date();
}

I would really like for my setDateCreated() method to be executed on every object when it is created.

Answer 1

You realize, of course, that this class breaks the Java Bean standard as coded.

The standard will expect to see a Date object passed to the setDateCreated() method:

public void setDateCreated(Date newDate) { 
    this.dateCreated = ((newDate == null) ? new Date() : new Date(newDate.getTime()));
}

You’re free to do it your way, once you add a void return type, but don’t be shocked if other code that expects you to conform to the standard complains.