Java: Timezone why different timezone give same value in millisec

Question

I have following code, my target is going to return GMT+0 time in millisec. But Why I always get my local timezone millisec?

Calendar cal         


        

Answer 1

The millisec of a Date object in Java is just the milliseconds since GMT+0 1970/01/01 00:00:00. It's independent of the Time Zone. Time Zone is a property to format the Date to a readable string.