Java中带有标识符变量的对象的“元访问”

Question

I want to access to a certain number of objects in Java without write a lot of code, for example:

int X;  
for(X=0;X<5;X++){
    jLabelX = /*do something*/
}

Would be something like this:

When X=0 then jLabel0 is access, X=1 then jLabel1 and so on...

Is there any way of doing this? or i need to specify all the cases

Answer 1

The best way of doing this is to not have variables called jLabel0 , jLabel1 etc in the first place. Instead, have an array variable (or some other collection):

JLabel[] labels = new JLabel[5];

for (int i = 0; i < labels.length; i++) {
    labels[i] = new JLabel();
    // Whatever

You can get at fields with reflection, but any time I see variables x0 , x1 , x2 etc I shudder - it's a clear indication that a collection of some kind is a better fit.