代码比较
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package date;
import java.text.SimpleDateFormat;
//
import java.util.Calendar;
import java.util.Date;
public class TestDate {
private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
public static void main(String[] args) {
Calendar c = Calendar.getInstance();
Date now = c.getTime();
// 当前日期
System.out.println("当前日期：\t" + format(c.getTime()));
// 下个月的今天
c.setTime(now);
c.add(Calendar.MONTH, 1);
System.out.println("下个月的今天:\t" +format(c.getTime()));
// 去年的今天
c.setTime(now);
c.add(Calendar.YEAR, -1);
System.out.println("去年的今天:\t" +format(c.getTime()));
// 上个月的第三天
c.setTime(now);
c.add(Calendar.MONTH, -1);
c.set(Calendar.DATE, 3);
System.out.println("上个月的第三天:\t" +format(c.getTime()));
}
private static String format(Date time) {
return sdf.format(time);
}
}
package date;
import java.text.SimpleDateFormat;
//
import java.util.Calendar;
import java.util.Date;
public class TestDate {
private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
public static void main(String[] args) {
Calendar c = Calendar.getInstance();
Date now = c.getTime();
// 当前日期
System.out.println("当前日期：\t" + format(c.getTime()));
// 下个月的今天
c.setTime(now);
c.add(Calendar.MONTH, 1);
System.out.println("下个月的今天:\t" +format(c.getTime()));
// 去年的今天
c.setTime(now);
c.add(Calendar.YEAR, -1);
System.out.println("去年的今天:\t" +format(c.getTime()));
// 上个月的第三天
c.setTime(now);
c.add(Calendar.MONTH, -1);
c.set(Calendar.DATE, 3);
System.out.println("上个月的第三天:\t" +format(c.getTime()));
}
private static String format(Date time) {
return sdf.format(time);
}
}
