Question

I have the following class:

private class Info{
    public String A;
    public int B;

    Info(){};

    public OtherMethod(){};
    private PrivMethod(){};
}

And I want to create an array of this class, but I want to provide a two dimensional array as an argument to the constructor, ie:

Info[] I = new Info({{"StringA", 1}, {"StringB", 2}, {"StringC", 3}});

Is that possible? If so how would I implement it? If not, what alternatives would you suggest?

Answer 1

Its possible, but not using the syntax you suggested. Java doesn’t support creating arrays out of constructors. Try the following:

public class Info {

    public String a;
    public int b;

    private Info(Object [] args) {
        a = (String) args[0];
        b = (Integer) args[1];
    }

    public static Info[] create(Object[]...args) {
        Info[] result = new Info[args.length];
        int count = 0;
        for (Object[] arg : args) {
            result[count++] = new Info(arg);
        }
        return result;
    }

    public static void main(String [] args) {
        Info[] data = Info.create(new Object[][] {{"StringA", 1}, {"StringB", 2}, {"StringC", 3}});
    }

}