CODEWITHSUNDEEP
javaconstructor
Josip Dorvak
Josip Dorvak

Reputation: 131

Java Constructor List as string

I'm trying to populate an array list of strings with the name of the constructors for a class. For some reason it's getting populated with the class name instead

Class<?> c = Class.forName(className);
        Constructor<?>[] construct = c.getDeclaredConstructors();
        for(int i = 0; i < construct.length; i++){
            memberList.add(construct[i].getName());
        }

Upvotes: 0

Views: 472

Answers (3)

Carlos Verdes
Carlos Verdes

Reputation: 3147

Like Sunil said, the constructor has the same name as the class and you should make the difference between them checking his params.

To get the params you could try the next code:

    public static void main(String[] args) throws ClassNotFoundException {
    Class<?> c = Class.forName(Class1.class.getCanonicalName());
    Constructor<?>[] constructors = c.getDeclaredConstructors();
    ArrayList<String> memberList = new ArrayList<String>();
    for(Constructor<?> constructor:constructors){
        memberList.add(constructor.getName());
        System.out.println("--------------------------------------");
        System.out.println(String.format("constructor: %s",new Object[]{constructor}));

        for(Class<?> paramType: constructor.getParameterTypes()){
            System.out.println(String.format("constructor param type: %s",paramType));
        }
    }

}

Upvotes: 0

cpurdy
cpurdy

Reputation: 1236

You need to drop the ".getName()" if you want the Constructor object in the list instead of the name of the Constructor object.

Upvotes: 0

ucsunil
ucsunil

Reputation: 7494

Constructors always take the name of the class - which is what you are seeing.

Upvotes: 3

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