Use Java programming to print out the current moment of yesterday

Method One: Import Java.util.Calendar; public class test{ public static void Main (string[] args) { Calendar cal = Calendar.getinstance (); Cal.add (Calendar.date,-1); System.out.println (Cal.gettime ()); } } Method Two: Import Java.util.Calendar; public class Test { public static void Main (string[] args) { Calendar C = calendar.getinstance (); int Year=c.get (calendar.year); int Month=c.get (calendar.month) +1; The system is 0 months from the beginning, and by December it will be zero. So when you take the month alone, you'll need to add one back to get the current month. int Date=c.get (calendar.date); int Hour=c.get (calendar.hour); int Sencond=c.get (Calendar.second); int Minute=c.get (calendar.minute); System.out.println ("Today is" + "" +year+ "Year" +month+ "month" +date+ "Day" + "" +hour+ "Hour" +sencond+ "" "+minute+" seconds "); int date1=date-1; System.out.println ("Yesterday is" + "" +year+ "Year" +month+ "month" +date1+ "Day" + "" +hour+ "Hours" +sencond+ "" "+minute+" "Seconds"); }}