在Java 8中，可以用下面的代码实现相同的功能。
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import java.time.LocalDateTime;class YesterdayCurrent { public static void main(String[] args) { LocalDateTime today = LocalDateTime.now(); LocalDateTime yesterday = today.minusDays(1); System.out.println(yesterday); }} |
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import java.util.Calendar;class YesterdayCurrent { public static void main(String[] args){ Calendar cal = Calendar.getInstance(); cal.add(Calendar.DATE, -1); System.out.println(cal.getTime()); }} |
原文：https://www.cnblogs.com/gjack/p/8901459.html