Get TimeZone by name(America/New_York)

import java.util.Calendar;
import java.util.TimeZone;

public class Main {

  public static void main(String[] args) {
    Calendar calNewYork = Calendar.getInstance();

    calNewYork.setTimeZone(TimeZone.getTimeZone("America/New_York"));

    System.out.println("Time in New York: " + calNewYork.get(Calendar.HOUR_OF_DAY) + ":"
        + calNewYork.get(Calendar.MINUTE));

  }
}

Time in New York: 11:51

import java.util.Calendar;
import java.util.TimeZone;

public class Main {

  public static void main(String[] args) {
    Calendar calParis = Calendar.getInstance();

    calParis.setTimeZone(TimeZone.getTimeZone("Europe/Paris"));
    System.out.println("Time in Paris: " + calParis.get(Calendar.HOUR_OF_DAY) + ":"
        + calParis.get(Calendar.MINUTE));

  }
}

Time in Paris: 17:51

import java.util.Calendar;
import java.util.TimeZone;

public class Main {

  public static void main(String[] args) {
    Calendar calTokyo = Calendar.getInstance();

    calTokyo.setTimeZone(TimeZone.getTimeZone("Asia/Tokyo"));

    System.out.println("Time in Tokyo: " + calTokyo.get(Calendar.HOUR_OF_DAY) + ":"
        + calTokyo.get(Calendar.MINUTE));
  }
}

Time in Tokyo: 1:51