如何实现前一日,后一日的移动? Calendar.Add();+1,+2 or -1,-2 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 String DATE_FORMAT = "yyyy-MM-dd"; java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat(DATE_FORMAT); Calendar c1 = Calendar.getInstance(); c1.set(1999, 0 , 20); // 1999 jan 20 System.out.println("Date is : " + sdf.format(c1.getTime())); c1.add(Calendar.DATE,20); System.out.println("Date + 20 days is : " + sdf.format(c1.getTime())); String DATE_FORMAT = "yyyy-MM-dd"; java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat(DATE_FORMAT); Calendar c1 = Calendar.getInstance(); // roll down the month c1.set(1999, 0 , 20); // 1999 jan 20 System.out.println("Date is : " + sdf.format(c1.getTime())); c1.roll(Calendar.MONTH, false); // roll down, substract 1 month System.out.println("Date roll down 1 month : " + sdf.format(c1.getTime())); // 1999 jan 20 c1.set(1999, 0 , 20); // 1999 jan 20 System.out.println("Date is : " + sdf.format(c1.getTime())); c1.add(Calendar.MONTH, -1); // substract 1 month System.out.println("Date minus 1 month : " + sdf.format(c1.getTime())); // 1998 dec 20 关于Java中定义动态数组的实现方法 求个算法 哪里有Java初级者的练习题啊? return语句 对话框程序,只有一个对话框窗口,如何显示任务栏图标? 如何得到TimeStamp型的现在时刻。。 请教高手几段代码<>望指教!!! 异常中的问题 请问如何在服务器端根据数据生成一个饼图文件(格式不限)? 新手上路,,,很简单的关于format的问题 求援:关于DB2 JDBC连接的一段代码,一定帮我看看!!! 救救命!
java.text.SimpleDateFormat sdf =
new java.text.SimpleDateFormat(DATE_FORMAT);
Calendar c1 = Calendar.getInstance();
c1.set(1999, 0 , 20); // 1999 jan 20
System.out.println("Date is : " + sdf.format(c1.getTime()));
c1.add(Calendar.DATE,20);
System.out.println("Date + 20 days is : " + sdf.format(c1.getTime()));
java.text.SimpleDateFormat sdf =
new java.text.SimpleDateFormat(DATE_FORMAT);
Calendar c1 = Calendar.getInstance();
// roll down the month
c1.set(1999, 0 , 20); // 1999 jan 20
System.out.println("Date is : " + sdf.format(c1.getTime()));
c1.roll(Calendar.MONTH, false); // roll down, substract 1 month
System.out.println("Date roll down 1 month : " + sdf.format(c1.getTime())); // 1999 jan 20 c1.set(1999, 0 , 20); // 1999 jan 20
System.out.println("Date is : " + sdf.format(c1.getTime()));
c1.add(Calendar.MONTH, -1); // substract 1 month
System.out.println("Date minus 1 month : " + sdf.format(c1.getTime())); // 1998 dec 20