How to compare current time with time range?

Question

I have two String variables - time1 and time2. Both contain value in the format HH:MM. How can I check:

1. If the current time is within time1 and time2?
2. time1 will happen in the nearest hour?

Upd. I've implemented the following to convert time1 to Date format. But it uses depreciated methods:

Date clTime1 = new Date();

SimpleDateFormat timeParser = new SimpleDateFormat("HH:mm", Locale.US);
try {
  clTime1 = timeParser.parse(time1);
} catch (ParseException e) {
}

Calendar now = Calendar.getInstance();
clTime1.setYear(now.get(Calendar.YEAR) - 1900);
clTime1.setMonth(now.get(Calendar.MONTH));
clTime1.setDate(now.get(Calendar.DAY_OF_MONTH));
System.out.println(clTime1.toString());

Answer 1

• Convert the two strings to Date objects (which are also time objects) Create a new Date object.
• This will contain the current time.
• Use the Date.before() and Date.after() methods to determine if you are in the time interval.

EDIT: You should be able to use this directly (and no deprecated methods)

public static final String inputFormat = "HH:mm";

private Date date;
private Date dateCompareOne;
private Date dateCompareTwo;

private String compareStringOne = "9:45";
private String compareStringTwo = "1:45";

SimpleDateFormat inputParser = new SimpleDateFormat(inputFormat, Locale.US);

private void compareDates(){
    Calendar now = Calendar.getInstance();

    int hour = now.get(Calendar.HOUR);
    int minute = now.get(Calendar.MINUTE);

    date = parseDate(hour + ":" + minute);
    dateCompareOne = parseDate(compareStringOne);
    dateCompareTwo = parseDate(compareStringTwo);

    if ( dateCompareOne.before( date ) && dateCompareTwo.after(date)) {
        //yada yada
    }
}

private Date parseDate(String date) {

    try {
        return inputParser.parse(date);
    } catch (java.text.ParseException e) {
        return new Date(0);
    }
}

Answer 2

This is what I used as simple function and it worked for me:

public static boolean isTimeWith_in_Interval(String valueToCheck, String startTime, String endTime) {
    boolean isBetween = false;
    try {
        Date time1 = new SimpleDateFormat("HH:mm:ss").parse(startTime);

        Date time2 = new SimpleDateFormat("HH:mm:ss").parse(endTime);

        Date d = new SimpleDateFormat("HH:mm:ss").parse(valueToCheck);

        if (time1.before(d) && time2.after(d)) {
            isBetween = true;
        }
    } catch (ParseException e) {
        e.printStackTrace();
    }
    return isBetween;
}

Answer 3

SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm");

Date EndTime = dateFormat.parse("10:00");

Date CurrentTime = dateFormat.parse(dateFormat.format(new Date()));

if (CurrentTime.after(EndTime))
{
    System.out.println("timeeee end ");
}

Don't forget to surrounded with a try catch block

Answer 4

if you want time between after 9PM to before 9Am you can use following condition..

if(cal.get(Calendar.HOUR_OF_DAY)> 20 || cal.get(Calendar.HOUR_OF_DAY)< 9)
{
    // do your stuffs
}

Answer 5

Look into the Calendar class. It has the methods to support what you are asking. Date is deprecated and not recommended to use.

Here is the link to the API. Calendar

About the usage. First you need to call Calendar.getInstance() to create a calendar object. Next you need to Set the two fields using cal.set(Calendar.HOUR, your hours) and Calendar.MINUTES the same way. Next you can call the compare function, before or after functions to get the desired info. Also you can get an instance with the current time in the current locale.

Answer 6

For example if you want to compare time between 11pm to 6am for calculating extra night fare for any vechicle. then following code will help you.

// Code

package com.example.timedate;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;

import android.os.Bundle;
import android.app.Activity;
import android.text.format.DateFormat;
import android.text.format.Time;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

    TextView tv;
    Button bt;
    int hour,min;
    String AM_PM;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv = (TextView)findViewById(R.id.textView1);
        bt = (Button)findViewById(R.id.button1);



        final String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(Calendar.getInstance().getTime());*/

        bt.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub


                Calendar c = Calendar.getInstance();
                hour = c.get(Calendar.HOUR_OF_DAY);
                min = c.get(Calendar.MINUTE);
                int ds = c.get(Calendar.AM_PM);
                if(ds==0)
                AM_PM="am";
                else
                AM_PM="pm";

                Toast.makeText(MainActivity.this, ""+hour+":"+min+AM_PM, Toast.LENGTH_SHORT).show();
                if((hour==11&&AM_PM.matches("pm")) || (hour<7&&AM_PM.matches("am"))  || (hour==12&&AM_PM.matches("am")))
                {
                    Toast.makeText(MainActivity.this, "Time is between the range", Toast.LENGTH_SHORT).show();
                }
                else
                    Toast.makeText(MainActivity.this, "Time is not between the range", Toast.LENGTH_SHORT).show();

            }
        });

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}`

Answer 7

    Try this if you have specific time Zone.  

              try {
            SimpleDateFormat dateFormat = new SimpleDateFormat("hh a");
            Date timeseven = dateFormat.parse("7 AM");
            Date timeTen = dateFormat.parse("10 AM");
            Date timeOne = dateFormat.parse("1 PM");
            Date timefour = dateFormat.parse("4 PM");
            Date timefive = dateFormat.parse("10 PM");
            //Get current time
            // Date CurrentTime = dateFormat.parse(dateFormat.format(new Date()));
            //Sample time 
            Date CurrentTime = dateFormat.parse("9 PM");

            if (CurrentTime.after(timeseven) && CurrentTime.before(timeTen)) {
                Toast.makeText(this, "FIRST", Toast.LENGTH_SHORT).show();
            } else if (CurrentTime.after(timeTen) && CurrentTime.before(timeOne)) {
                Toast.makeText(this, "Secound", Toast.LENGTH_SHORT).show();
            } else if (CurrentTime.after(timeOne) && CurrentTime.before(timefour)) {
                Toast.makeText(this, "THird", Toast.LENGTH_SHORT).show();
            } else if (CurrentTime.after(timefour) && CurrentTime.before(timefive)) {
                Toast.makeText(this, "Fourth", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(this, "Not found in your time zone", Toast.LENGTH_SHORT).show();
            }

        } catch (Exception e) {
            e.printStackTrace();
        }

Answer 8

As of now, I am thinking about the following approach:

int clTime = Integer.parseInt(time1.substring(0, 1))*60 + Integer.parseInt(time1.substring(3, 4)); 

Time now = new Time();
now.setToNow();
int nowTime = now.hour*60 + now.minute;

So, I'll need to compare just integer values clTime and nowTime.

Answer 9

class TimeRange {

    LocalTime from;
    LocalTime to;

    public TimeRange(LocalTime from, LocalTime to) {
        this.from = from;
        this.to = to;
    }

    public boolean isInRange(Date givenDate) {

        LocalTime givenLocalTime = getLocalDateTime(givenDate).toLocalTime();
        return givenLocalTime.isAfter(from) && givenLocalTime.isBefore(to);
    }

    public static LocalDateTime getLocalDateTime(Date date){

        return LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
    }
}