android - Buttons setText from shuffled list item positions display wrong results -

i have string array numbers "25", "50", "75", "100" , i'm using method below shuffle positions of list' s items.

public list<string> listnums() {      list<string> numlist = arrays.aslist(nums);      collections.shuffle(numlist);     return numlist; 

i have method assign list items 4 buttons:

protected void settxtnums(){     numgenerator numgen = new numgenerator();      bnum2.settext(numgen.listnums().get(0).tostring());     bnum3.settext(numgen.listnums().get(1).tostring());     bnum4.settext(numgen.listnums().get(2).tostring());     bnum5.settext(numgen.listnums().get(3).tostring()); } 

and i'm trying click on button change text above buttons, doesn't work. onclick code this:

case r.id.bnumgen:         settxtnums();                    break; 

the problem generates dublicate values. want every button have different number, positions change.

if include toast testing this:

toast.maketext(getapplicationcontext(), numgen.listbignums().tostring(), toast.length_long).show(); 

then on toast correct results, buttons different , same values 2 or 3 of them. mistake?

first of did shuffle on different lists rather required one.and second logic wrong.try this.

list<string> numlist = arrays.aslist(nums); public list<string> listnums() { return numlist; }  public void shufflelist() {     collections.shuffle(intlist);     return numlist; } 

now :

protected void settxtnums(){     numgenerator numgen = new numgenerator();     numgen.shufflelist();      bnum2.settext(numgen.listnums().get(0).tostring());     bnum3.settext(numgen.listnums().get(1).tostring());     bnum4.settext(numgen.listnums().get(2).tostring());     bnum5.settext(numgen.listnums().get(3).tostring()); }