Assange is serving a 50-week prison sentence after being dragged out of the Ecuadorian embassy in April and jailed for a bail violation.
And an investigation has been reopened into an allegation of rape in Sweden, which Assange has always denied.
Mr Javid told BBC Radio 4’s Today programme: “I am very pleased that the police were finally able to apprehend him and now he’s rightly behind bars because he broke UK law.