How to calculate the total number of days passed

Question

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Calculate date/time difference in java

I am providing the user with the option to select the date using Date Picker. Is there any in-built method using which I can calculate the duration in days wrt to user selected date and todays date.

no there is no inbuilt method. You have to write those 4 lines of code. It is frustrating :( — Mukesh Soni, Sep 18 '12 at 13:13
hey mate you have any such code which you have implemented earlier ? — , Sep 18 '12 at 13:13

score 2 · Answer 1 · answered Sep 18 '12 at 13:10

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I don't like answering this because there were millions of questions like this (use search option before posting questions). Use Joda Time. There is a Period class, which will be useful for you.

answered Sep 18 '12 at 13:10

alex

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score 0 · Answer 2 · answered Sep 18 '12 at 13:11

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Get the difference between the two times in milliseconds. Than you can get the Days via Java's Calendar class.

answered Sep 18 '12 at 13:11

Thommy

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score 0 · Answer 3 · answered Sep 18 '12 at 13:12

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Date today = new Date(); // the date of today
Date target = new Date(); // the date of when the user picks

long todayEpoch = today.getTime(); // or can use = System.currentTimeMillis();
long targetEpoch = target.getTime();

long daysInMs = targetEpoch - todayEpoch; //days in MS's

//the # of days
float days = (daysInMs/1000/60/60/12);

answered Sep 18 '12 at 13:12

Jug6ernaut

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Then go straight to Epoch, ether way the Date class works fine for this. – Jug6ernaut Sep 18 '12 at 13:16
That's not going to account for bisextile years (366 days) – Philippe Girolami Sep 18 '12 at 13:20

How to calculate the total number of days passed

3 Answers3