Try the following code.
System.setProperty("webdriver.chrome.driver","C:\\chromedriver.exe");
ChromeOptions options = new ChromeOptions();
options.addArguments("user-data-dir=C:/Users/user_name/AppData/Local/Google/Chrome/User Data");
options.addArguments("--start-maximized");
driver = new ChromeDriver(options);
For further understanding, you can refer to the Selenium Training.
Hope this helps!