Java编程,打印昨天的当前时刻

public class Demo {

/*

* Java编程,打印昨天的当前时刻

*/

public static void main(String[] args){

Calendar cal = Calendar.getInstance();

cal.add(Calendar.DATE, -1);

Date date = cal.getTime();

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

String str = sdf.format(date);

System.out.println(str);

}

}