Java

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());    }}

在Java 8中，可以用下面的代码实现相同的功能。

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);    }}