How to get the current GMT time in java

Hi,
How to get the current GMT time in java
Thanks

System.getCurrentTimeMillis() or new Date().
[url http://www.javaworld.com/jw-12-2000/jw-1229-dates.html]Calculating Java dates: Take the time to learn how to create and use dates
[url http://www.javaalmanac.com/egs/java.text/FormatDate.html]Formatting a Date Using a Custom Format

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Hi Experts,
             In my project i have two date input fields called
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and one Absence type input field is there. The user wants to set the start Date ,End date and absence type.
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Hello Venkat,
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date format
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want to get the current system time and compare with the two different timing example startwindow time as 2:00:00AM and endWindowTime as 6:00:00AM. if my current system time falls between these window i have to execute my rest of the code.
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How to get the current GMT time in java

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