[SOLVED] how to run loop unless and until user enter correct value

[angryboy]

If you chain 3 of these, it'll work. And read the links chris provided.

         GET                             
        USER                             
        INPUT  <--------------------     
          .                        |     
          |                        |     
          |                        |     
+-------------------+              ,,    
|                   |           ,'`  `.  
|  while(condition) |          /       \ 
|                   |-------->|  RETRY  |
|    M OR F ?       |    false \       / 
|                   |           '.   ,'  
|                   |             ```    
+--------/----------+                    
         |                               
         |                               
         |                               
         |                               
         | true                          
       ----                              
       NEXT                              
       ----

[mfaizan24]

I have change it to this

if((age<=0) && (!g.matches("^[mMfF]$"))){
System.out.println("Age and gender both are incorrect");
System.out.println("need to enter all details again");
continue;
}else if(age<=0){
System.out.println("age is less than or equal to 0");
System.out.println("need to enter all details again");
continue;
} else if(!g.matches("^[mMfF]$")){
System.out.println("Gender must be male or female other characters found");
System.out.println("need to enter all details again");
continue;
}

problem resolved thanks everyone thank you very much.
:)