printcalendar.java

一个简单的日历程序,用java开发的

import java.util.*;

public class PrintCalendar {
	
GregorianCalendar d=new GregorianCalendar();
int today;
int month;
int weekday;
String flag="";

  public PrintCalendar(){
	  today=d.get(Calendar.DAY_OF_MONTH);
	
            
     d.set(Calendar.DAY_OF_MONTH,1);

    
    
}


  public StringBuffer printdate(){
	StringBuffer resultstring=new StringBuffer();
	if(flag=="<")
		  d.set(Calendar.MONTH, -1);
	  else if(flag==">")
		  d.set(Calendar.MONTH, 1);
    month=d.get(Calendar.MONTH);
    weekday=d.get(Calendar.DAY_OF_WEEK);
	for(int i=Calendar.SUNDAY;i<weekday;i++){
		//System.out.println("111111111");
		resultstring.append("      ");
		
	}
	
	do{
		
		int day=d.get(Calendar.DAY_OF_MONTH);
		if(day<10)
		    resultstring.append("    "+day);
		else
			resultstring.append("   "+day);
		//对当时作标记
		if(day==today)
			resultstring.append("*");
		else
			resultstring.append(" ");
		//每周六后换行
		if(weekday==Calendar.SATURDAY)
			resultstring.append("\n");
		//递增到下一天
		d.add(Calendar.DAY_OF_MONTH, 1);
		weekday=d.get(Calendar.DAY_OF_WEEK);
		
		
		
	}while(d.get(Calendar.MONTH)==month);
	
	return resultstring;
	
	
}


public String getFlag() {
	return flag;
}


public void setFlag(String flag) {
	this.flag = flag;
}
}