cassDesignIssue

public class Expect {

    private A[] a;
    private B[] b;

    public Expect(A[] a, B[] b) {
        this.a = a;
        this.b = b;
    }

    public Expect(A[] a) {
        this.a = a;
    }

    public Expect(B[] b) {
        this.b = b;
    }

    + GETTERS, SETTERS
}

public class A {

    private String name;
    private int value;

    public A(String name, int value) {
        this.name = name;
        this.value = value;
    }
    + GETTERS, SETTERS
}

public class B {

    private int age;

    public A(int age) {
        this.age = age;
    }
    + GETTERS, SETTERS
}