what the output? import java.util.ArrayList;

public class IntegersList $\{$

public static void main$($String$[]$ args$)\{$

ArrayList userVals $=$ new ArrayList$()$;

int i;

userVals.add$(2)$;

userVals.add$(6)$;

userVals.add$(9)$;

userVals.set$(0,$ userVals.get$(2))$;

userVals.set$(2,$ userVals.get$(0))$;

for $($i $=0$; i $<$ userVals.size$()$; $++$i$)\{$

System.out.println$($userVals$.$get$($i$))$;

$\}$

$\}$

$\}$