Examples of org.joda.time.DateTime.withZone()

org.joda.time.DateTime.withZone()
Returns a copy of this datetime with a different time zone, preserving the millisecond instant.
This method is useful for finding the local time in another timezone. For example, if this instant holds 12:30 in Europe/London, the result from this method with Europe/Paris would be 13:30.
The returned object will be a new instance of the same implementation type. This method changes the time zone, and does not change the millisecond instant, with the effect that the field values usually change. The returned object will be either be a new instance or this. @param newZone the new time zone @return a copy of this datetime with a different time zone @see #withZoneRetainFields

        assertEquals(dt.toString(), "20", f.print(dt));
        
        dt = dt.withZone(NEWYORK);
        assertEquals(dt.toString(), "20", f.print(dt));
        
        dt = dt.withZone(TOKYO);
        assertEquals(dt.toString(), "20", f.print(dt));
    }


    //-----------------------------------------------------------------------
    public void testFormat_second() {

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    public void testFormat_second() {
        DateTime dt = new DateTime(2004, 6, 9, 10, 20, 30, 40, UTC);
        DateTimeFormatter f = DateTimeFormat.forPattern("s").withLocale(Locale.UK);
        assertEquals(dt.toString(), "30", f.print(dt));
        
        dt = dt.withZone(NEWYORK);
        assertEquals(dt.toString(), "30", f.print(dt));
        
        dt = dt.withZone(TOKYO);
        assertEquals(dt.toString(), "30", f.print(dt));
    }

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        assertEquals(dt.toString(), "30", f.print(dt));
        
        dt = dt.withZone(NEWYORK);
        assertEquals(dt.toString(), "30", f.print(dt));
        
        dt = dt.withZone(TOKYO);
        assertEquals(dt.toString(), "30", f.print(dt));
    }


    //-----------------------------------------------------------------------
    public void testFormat_fractionOfSecond() {

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    public void testFormat_fractionOfSecond() {
        DateTime dt = new DateTime(2004, 6, 9, 10, 20, 30, 40, UTC);
        DateTimeFormatter f = DateTimeFormat.forPattern("SSS").withLocale(Locale.UK);
        assertEquals(dt.toString(), "040", f.print(dt));
        
        dt = dt.withZone(NEWYORK);
        assertEquals(dt.toString(), "040", f.print(dt));
        
        dt = dt.withZone(TOKYO);
        assertEquals(dt.toString(), "040", f.print(dt));
    }

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        assertEquals(dt.toString(), "040", f.print(dt));
        
        dt = dt.withZone(NEWYORK);
        assertEquals(dt.toString(), "040", f.print(dt));
        
        dt = dt.withZone(TOKYO);
        assertEquals(dt.toString(), "040", f.print(dt));
    }


    //-----------------------------------------------------------------------
    public void testFormat_fractionOfSecondLong() {

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    public void testFormat_fractionOfSecondLong() {
        DateTime dt = new DateTime(2004, 6, 9, 10, 20, 30, 40, UTC);
        DateTimeFormatter f = DateTimeFormat.forPattern("SSSSSS").withLocale(Locale.UK);
        assertEquals(dt.toString(), "040000", f.print(dt));
        
        dt = dt.withZone(NEWYORK);
        assertEquals(dt.toString(), "040000", f.print(dt));
        
        dt = dt.withZone(TOKYO);
        assertEquals(dt.toString(), "040000", f.print(dt));
    }

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        assertEquals(dt.toString(), "040000", f.print(dt));
        
        dt = dt.withZone(NEWYORK);
        assertEquals(dt.toString(), "040000", f.print(dt));
        
        dt = dt.withZone(TOKYO);
        assertEquals(dt.toString(), "040000", f.print(dt));
    }


    //-----------------------------------------------------------------------
    public void testFormat_zoneText() {

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    public void testFormat_zoneText() {
        DateTime dt = new DateTime(2004, 6, 9, 10, 20, 30, 40, UTC);
        DateTimeFormatter f = DateTimeFormat.forPattern("z").withLocale(Locale.UK);
        assertEquals(dt.toString(), "UTC", f.print(dt));
        
        dt = dt.withZone(NEWYORK);
        assertEquals(dt.toString(), "EDT", f.print(dt));
        
        dt = dt.withZone(TOKYO);
        assertEquals(dt.toString(), "JST", f.print(dt));
    }

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        assertEquals(dt.toString(), "UTC", f.print(dt));
        
        dt = dt.withZone(NEWYORK);
        assertEquals(dt.toString(), "EDT", f.print(dt));
        
        dt = dt.withZone(TOKYO);
        assertEquals(dt.toString(), "JST", f.print(dt));
    }


    public void testFormat_zoneLongText() {
        DateTime dt = new DateTime(2004, 6, 9, 10, 20, 30, 40, UTC);

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    public void testFormat_zoneLongText() {
        DateTime dt = new DateTime(2004, 6, 9, 10, 20, 30, 40, UTC);
        DateTimeFormatter f = DateTimeFormat.forPattern("zzzz").withLocale(Locale.UK);
        assertEquals(dt.toString(), "Coordinated Universal Time", f.print(dt));
        
        dt = dt.withZone(NEWYORK);
        assertEquals(dt.toString(), "Eastern Daylight Time", f.print(dt));
        
        dt = dt.withZone(TOKYO);
        assertEquals(dt.toString(), "Japan Standard Time", f.print(dt));
    }

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