Using a class as a parameter in a method

[Mnau Lubi]

Hi!

I am using a POJO ( a very simple class: some variables + getters and setters) to store info of bikes. For example:

  
public class Track {

    private String ID = "003497431";
    private String name = "Fire";
    private String colour= "red";
    private String age = "5"

  

Therefore, each bike is represented by one POJO.

I would like to know if it is possible to create a method which takes the class as parameter. For example:

  

public void newBike(class POJO){

So I can just pass one parameter (the class) instead of having to execute all the getters in that class to obtain all the variables and then call the method with thousand parameters.

Thanks in advance

[Seetharaman Venkatasamy]

probably, reflection mechanism fit for your requirement

[David Newton]

Your requirement is unclear. Can't you just pass the instance of the object?

[Jesper de Jong]

It's not clear what you mean exactly.

Mnau Lubi wrote:So I can just pass one parameter (the class) instead of having to execute all the getters in that class to obtain all the variables and then call the method with thousand parameters.

Do you mean that you want to set the fields of all existing instances of a certain class to certain values? There is no way in Java to find all existing instances of a class, if you only know the class. Java doesn't keep track of all the instances of a class; you have to do that yourself. So if that's what you mean, then that's not possible.

If you have all your Track objects in a collection, for example a List, you could ofcourse pass that List to your method:

public void myMethod(List<Track> tracks) {
	// ...
}

Or... are you maybe confusing the terms "class" and "object", and do you simply mean that you want to pass a Track object to your method:

public void myMethod(Track track) {
	String id = track.getID();

	// ...
}

[Mnau Lubi]

yes, sorry I was confusing class with object