How to randomly get item from string array?

I am trying to generate random questions from my String array called Questions. There 10 items inside. I am trying to set the text of JLabel where once the button is click one of the questions from the array will randomly be selected and displayed. However these 2 sections of code doesn't return anyting.

public String getNextQuestion() {
    int NextQues = (int)(Math.random()*10);
    return Questions[NextQues];}

public void actionPerformed (ActionEvent e) {
     if(e.getSource() == Button) {  
Hello.setText(Questions[NextQues]);