java时区设置

int a=comboBox.getSelectedIndex();//获得选中时间的下标
				String b=new String();
				b="GMT+"+a;//设置时区格式
				TimeZone shiqu = TimeZone.getTimeZone(b);//获得对应时区
				Calendar calendar = Calendar.getInstance();
				Calendar LATime = new GregorianCalendar(shiqu);//导入获得的时区时间
				LATime.setTimeInMillis(calendar.getTimeInMillis());//时间获取到秒
				int year = LATime.get(Calendar.YEAR);
				int month = LATime.get(Calendar.MONTH)+1;
				int date = LATime.get(Calendar.DATE);
				int hour=LATime.get(Calendar.HOUR_OF_DAY)+1;
				int minute=LATime.get(Calendar.MINUTE);
				int s=LATime.get(Calendar.SECOND);
				String next=year+"年"+month+"月"+date+"日"+hour+"时"+minute+"分"+s+"秒";//初始化时间格式
				
				showtime.setText(next);//lable框中输出时间
				String b2=new String();
				b2=comboBox.getSelectedItem().toString();//得到选中的文本
				lblNewLabel_2.setText(b2);//对应lable中显示选中的文本