Ask for help! Come check it out! The rookie problem Help us a lot! !! !!

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java.util.Calendar c=java.util.Calendar.getInstance();
if(c.get(java.util.Calendar.DAY_OF_YEAR)<10){
     out.println(c.get(java.util.Calendar.YEAR)+"00"+c.get(java.util.Calendar.DAY_OF_YEAR));
     
    }
if(c.get(java.util.Calendar.DAY_OF_YEAR)>10&&c.get(java.util.Calendar.DAY_OF_YEAR)<100){
     out.println(c.get(java.util.Calendar.YEAR)+"0"+c.get(java.util.Calendar.DAY_OF_YEAR));
     
    }
if(c.get(java.util.Calendar.DAY_OF_YEAR)>100){
     out.println(c.get(java.util.Calendar.YEAR)+""+c.get(java.util.Calendar.DAY_OF_YEAR));
     
    }

solved

风云无心

java.util.Calendar c=java.util.Calendar.getInstance();
String s = "000";
String years = String.valueOf(c.get(java.util.Calendar.YEAR));
String days = String.valueOf(c.get(java.util.Calendar.DAY_OF_YEAR));
s = years.concat(s.substring(0,s.length()-days.length()).concat(days));
The
System.out.println(s);

okok02

java.util.Calendar c=java.util.Calendar.getInstance();
String a = "000"+c.get(java.util.Calendar.DAY_OF_YEAR);
a=a.substring(a.length()-3);
System.out.print(c.get(java.util.Calendar.YEAR)+a.substring(a.length()-3));