Sample.java

package com.freemindcafe.timezone.sample1;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;

import org.junit.Test;

import junit.framework.Assert;

public class Sample {
    
    @Test
    public void normal_day(){
        
        TimeZone timeZone = TimeZone.getTimeZone("America/Los_Angeles");
        System.out.println(timeZone.useDaylightTime());
        System.out.println(timeZone.getDSTSavings());
        //timeZone.inDaylightTime(date)
        
        Calendar startTime = Calendar.getInstance(TimeZone.getTimeZone("America/Los_Angeles"));
        startTime.set(2015, Calendar.JANUARY, 1, 1, 0, 0);
        
        Calendar endTime = Calendar.getInstance(TimeZone.getTimeZone("America/Los_Angeles"));
        endTime.set(2015, Calendar.JANUARY, 2, 0, 0, 0);        
        
        int count = 0;
        
        while(endTime.after(startTime) || endTime.equals(startTime)){
            System.out.format("%d-%02d-%02dT%02d-%02d-%02d\n",
                    startTime.get(Calendar.YEAR), startTime.get(Calendar.MONTH), startTime.get(Calendar.DAY_OF_MONTH), 
                    startTime.get(Calendar.HOUR_OF_DAY), startTime.get(Calendar.MINUTE), startTime.get(Calendar.SECOND));
            startTime.add(Calendar.HOUR_OF_DAY, 1);
            count++;
        }
        
        Assert.assertTrue(count == 24);
        
    }
    
    public static void main(String[] args) {
        

    }

}