title: How to convert String (hh:mm) to date with current date
body: <p>I' would like to calculate difference between current time and time from String (in minutes).</p>
  
  <p>I've got String (from SQlite database) like this:</p>
  
  <pre><code> String time1= "22:50";
  </code></pre>
  
  <p>I'm getting current date as:</p>
  
  <pre><code>  Date currentDate = new Date()
     long test = currentData.getTime();
  </code></pre>
  
  <p>Parsing String to date:</p>
  
  <pre><code> SimpleDateFormat dateFormat = new SimpleDateFormat(
                                  "yyyy-MM-dd HH:mm:ss");
  oldDate = dateFormat.parse(time1);
  </code></pre>
  
  <p>Then difference:</p>
  
  <pre><code>  diff = test - oldDate.getTime();
    long seconds = diff / 1000;
    long minutes = seconds / 60;
  </code></pre>
  
  <p>But main problem is caused by lack of current data information (I've only time).
  I would like to have: Current data + time from String and then compare it to current date and time.</p>