Problems with vectors

[japuentem]

I have an application that receive some vectors inside one main vector. The user set the information to the arrays

vector1 {a, b}
vector2 {1, 2}
vector3 {x, y}
vector4 {20,21}
vector5 {s,t}
mainVector {vector1,vector 2,vector3,vecto r4,vector5}

and i print the information on the screen as follows

a 1 x 20 s
b 2 y 21 t

my problem is when the user set just one value in the vector, for example the user don't set the x value:

a 1 20 s
b 2 y 21 t

this throw me an ArrayIndexOutOf BoundsException

is there something that i can do, or i should use arrays instead vectors

[JosAH]

I have an application that receive some vectors inside one main vector. The user set the information to the arrays

vector1 {a, b}
vector2 {1, 2}
vector3 {x, y}
vector4 {20,21}
vector5 {s,t}
mainVector {vector1,vector 2,vector3,vecto r4,vector5}

and i print the information on the screen as follows

a 1 x 20 s
b 2 y 21 t

my problem is when the user set just one value in the vector, for example the user don't set the x value:

a 1 20 s
b 2 y 21 t

this throw me an ArrayIndexOutOf BoundsException

is there something that i can do, or i should use arrays instead vectors

Nope, you should use classes and objects instead: use a class that can store
(using your notation) { a, b }, { 1, 2, }, { x, y }, { 20, 21 } and { s, t } instead. That
way you have kept the coupling of those pairs encapsulated in one single object
instead. Using arrays (or Lists for that matter) for every single datum item is so
outdated Fortranesque.

kind regards,

Jos