Walcott sees no reason why Arsenal should not be lifting silverware for the first time in six years.
He said: "I think this year we've got that experience that any failures from the past won't happen again. We need to win the Premier League.
"There is a confidence in the camp - and I believe we will be champions, I really do believe it.
"I'm very confident, you've got to be.
"If you're not confident, then there's something wrong completely."