java中日期字符中首位为0去掉

public class Test {

  public static void main(String[] args) {

String time="16月12日";

//00 01 10 

String firstMonth3=time.substring(0, 1);

String firstDay3=time.substring(3, 4);

String a3="";

String b3="";

String c3="";

//01

if("0".equals(firstMonth3)&&!"0".equals(firstDay3)){

a3=time.substring(1,6);

  
 }

//00

if("0".equals(firstMonth3)&&"0".equals(firstDay3)){

a3=time.substring(1,3);

b3=time.substring(4,6);

   
}

//10

if(!"0".equals(firstMonth3)&&"0".equals(firstDay3)){

a3=time.substring(0,3);

b3=time.substring(4,6);

   
}

//11

if(!"0".equals(firstMonth3)&&!"0".equals(firstDay3)){

        a3=time.substring(0, 6);
  

 }


     System.out.println(a3+b3+c3);
 

     

 }

 }