how to convert string into time format and add two hours [duplicate]

You can use SimpleDateFormat to convert the String to Date. And after that you have two options,

• Make a Calendar object and and then use that to add two hours, or

• get the time in millisecond from that date object, and add two hours like, (2 * 60 * 60 * 1000)

  SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
  
  // replace with your start date string
  Date d = df.parse("2008-04-16 00:05:05"); 
  Calendar gc = new GregorianCalendar();
  gc.setTime(d);
  gc.add(Calendar.HOUR, 2);
  Date d2 = gc.getTime();
  

  Or,

  SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
  
  // replace with your start date string
  Date d = df.parse("2008-04-16 00:05:05");
  Long time = d.getTime();
  time +=(2*60*60*1000);
  Date d2 = new Date(time);
  

Have a look to these tutorials.

• SimpleDateFormat Tutorial
• Calendar Tutorial