Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.util.Calendar;
import java.util.GregorianCalendar;

public class Main {
    public static String formatDateDiff(long date) {
        Calendar c = new GregorianCalendar();
        c.setTimeInMillis(date);
        Calendar now = new GregorianCalendar();
        return formatDateDiff(now, c);
    }

    public static String formatDateDiff(Calendar fromDate, Calendar toDate) {
        boolean future = false;
        if (toDate.equals(fromDate)) {
            return ("now");
        }
        if (toDate.after(fromDate)) {
            future = true;
        }
        StringBuilder sb = new StringBuilder();
        int[] types = new int[] { Calendar.YEAR, Calendar.MONTH, Calendar.DAY_OF_MONTH, Calendar.HOUR_OF_DAY,
                Calendar.MINUTE, Calendar.SECOND };
        String[] names = new String[] { ("year"), ("years"), ("month"), ("months"), ("day"), ("days"), ("hour"),
                ("hours"), ("minute"), ("minutes"), ("second"), ("seconds") };
        int accuracy = 0;
        for (int i = 0; i < types.length; i++) {
            if (accuracy > 2) {
                break;
            }
            int diff = dateDiff(types[i], fromDate, toDate, future);
            if (diff > 0) {
                accuracy++;
                sb.append(" ").append(diff).append(" ").append(names[i * 2 + (diff > 1 ? 1 : 0)]);
            }
        }
        if (sb.length() == 0) {
            return "now";
        }
        return sb.toString().trim();
    }

    static int dateDiff(int type, Calendar fromDate, Calendar toDate, boolean future) {
        int diff = 0;
        long savedDate = fromDate.getTimeInMillis();
        while ((future && !fromDate.after(toDate)) || (!future && !fromDate.before(toDate))) {
            savedDate = fromDate.getTimeInMillis();
            fromDate.add(type, future ? 1 : -1);
            diff++;
        }
        diff--;
        fromDate.setTimeInMillis(savedDate);
        return diff;
    }
}