java robot class

if you want to perform some click / enter action over one element in  browser

option 1: slenium

option 2: slenium Action class

option 3: java script / jquerry

option 4: java robot class

import java.awt.Robot;

Robot robot1 = new Robot();

robot1.delay(3000);

robot1.keyPress(KeyEvent.VK_ENTER);