Best practice for returning multiple values in Java?

Question

Today I\'ve added a extra security check behind my login forms, to slow down brute force attacks. I\'ve got multiple login forms and made a nice easy to call function that d

Answer 1

Here is a possible solution I picked up from another discussion, and enhanced a bit. It uses a public inner class with a private constructor:

public class Test {
    // Internal storage unit for the two values:
    // 'name' and 'age'.
    private Pair info;

    public Test() {
        // Empty default constructor.
    }

    /**
     * The two values are stored in the Test class.
     *
     * @param name
     * @param age
     */
    public void setInfo(String name, int age) {
        info = new Pair<>(name, age);
    }

    /**
     * The 'name' and 'age' values are returned in a
     * single object.
     *
     * @return Both values in a Pair object.
     */
    public Pair getInfo() {
        return info;
    }

    /**
     *  This is an Inner Class for providing pseudo 'tuplet'
     *  as a 'get' return value.
     *
     * @param  first internally stored value.
     * @param  second internally stored value.
     */
    public class Pair {

        public final F first;
        public final S second;

        // This constructor is private to prevent
        // it being instantiated outside its
        // intended environment.
        private Pair(F first, S second) {
            this.first = first;
            this.second = second;
        }

        @Override
        public String toString(){
            return first + ", " + second;
        }
    }

    /**
     * main method for testing of the class only.
     *
     * @param args
     */
    public static void main(String args[]) {
        Test test = new Test();

        test.setInfo("Peter Smith", 35);
        Test.Pair pair = test.getInfo();

        System.out.println("name: " + pair.first);
        System.out.println("age: " + pair.second);
        System.out.println(pair.toString());
    }
}