java实现可视化日历

package 尚学堂;import java.text.DateFormat;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.GregorianCalendar;import javax.print.CancelablePrintJob;/** * 可视化日历程序 * @author lijiazhao * */public class TestCalendar2 {  public static void main(String[] args) throws ParseException { // String str = "2020-9-10"; DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  String str = df.format(new Date()); System.out.println("北京时间："+df.format(new Date())+"/n");  Date date = df.parse(str); Calendar c = new GregorianCalendar(); c.setTime(date);  int day = c.get(Calendar.DAY_OF_MONTH); int days = c.getActualMaximum(Calendar.DATE);  System.out.println("日/t一/t二/t三/t四/t五/t六");  c.set(Calendar.DAY_OF_MONTH, 1);  for(int i=0;i<c.get(Calendar.DAY_OF_WEEK)-1;i++) {  System.out.print("/t"); }   for(int i=1;i<=days;i++) {  if(day == c.get(Calendar.DAY_OF_MONTH)) {  System.out.print(c.get(Calendar.DAY_OF_MONTH)+"*/t");  }else {  System.out.print(c.get(Calendar.DAY_OF_MONTH)+"/t");  }    if(c.get(Calendar.DAY_OF_WEEK)==Calendar.SATURDAY) {  System.out.println(); //换行  }    c.add(Calendar.DAY_OF_MONTH, 1);    }  }}