[Q#5950417][A#5950446] How to increment time by 1 hour

https://stackoverflow.com/q/5950417

I have two time values. one for the previous login time and one for the current login time. I have to increase previous time login by one hour. I have used the date format hh:mm:ss. This is my code snippet. so instead of the above mentioned if condition, I have to add one hour to the previous_time and do the if condition. How to achieve this?

Answer

https://stackoverflow.com/a/5950446

APIzation

Calendar calendar = Calendar.getInstance();
   calendar.setTime(previous_time);
   calendar.add(Calendar.HOUR, 1);
   previous_time = calendar.getTime();
   // do your comparison

package com.stackoverflow.api;

import java.util.Calendar;
import java.util.Date;

public class Human5950446 {

  public static Date incrementTimeByOneHour(Date previous_time) {
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(previous_time);
    calendar.add(Calendar.HOUR, 1);
    previous_time = calendar.getTime();
    return previous_time;
  }
}

package com.stackoverflow.api;

import java.util.Calendar;
import java.util.Date;

/**
 * How to increment time by 1 hour
 *
 * @author APIzator
 * @see <a href="https://stackoverflow.com/a/5950446">https://stackoverflow.com/a/5950446</a>
 */
public class APIzator5950446 {

  public static void increment(Date previous_time) throws Exception {
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(previous_time);
    calendar.add(Calendar.HOUR, 1);
    previous_time = calendar.getTime();
    // do your comparison
  }
}