java - How to go back to steps in a program? -

i have bank account program rewriting when wrote in school , wondering how go step within program.

so, after create account, , choose option withdrawl, go , prompt option once again, how done? (see comment in code) thanks..

main class:

import java.text.*;  public class bankaccounttest {  public static void main (string args[]){              numberformat formatter = numberformat.getnumberinstance();             formatter.setmaximumfractiondigits(2);  // helps formatter format final output             formatter.setminimumfractiondigits(2);             consolereader console = new consolereader(system.in);       system.out.println("hello, make new bank account?");      string newa = console.readline();       if(newa.equalsignorecase("yes")){          system.out.println("how deposit initially?");          double init = console.readdouble();           bankaccount account = new bankaccount(init);           system.out.println("your account created, do? /n 1: balance /n 2: account id /n 3: make withdrawl /n 4: make deposit?");          string option = console.readline();           if(option.equalsignorecase("get balance")){              system.out.println(account.getbalance());  //go if after excecutes          }      }   } } 

bank account class:

public class bankaccount {      public static int bankid = 0;      //constructor called bankaccount michaelsbank = new bankaccount();     public bankaccount(){         balance = 0;         accnum = bankid++;     }      //constructs bank account initial deposit, used if given number parameter     public bankaccount(double initialbalance){         balance = initialbalance;     }           public void deposit(double amount){             balance = balance + amount;         }          public void withdraw(double amount){             balance = balance - amount;         }          public double getbalance(){             return balance;         }          public int getid(){             return accnum;         }          private int accnum;         private double balance;  } 

console reader class:

import java.io.bufferedreader; import java.io.inputstream; import java.io.inputstreamreader; import java.io.ioexception;  /**     class read strings , numbers input stream.    class suitable beginning java programmers.    constructs necessary buffered reader,     handles i/o exceptions, , converts strings numbers. */  public class consolereader {  /**       constructs console reader input stream       such system.in       @param instream input stream     */    public consolereader(inputstream instream)    {  reader = new bufferedreader          (new inputstreamreader(instream));     }     /**       reads line of input , converts integer.       input line must contain nothing integer.       not added white space allowed.       @return integer user typed    */    public int readint()     {  string inputstring = readline();       int n = integer.parseint(inputstring);       return n;    }     /**       reads line of input , converts floating-       point number. input line must contain nothing        nunber. not added white space allowed.       @return number user typed    */    public double readdouble()     {  string inputstring = readline();       double x = double.parsedouble(inputstring);       return x;    }     /**       reads line of input. in (unlikely) event       of ioexception, program terminates.        @return line of input user typed, null       @ end of input    */    public string readline()     {  string inputline = "";        try       {  inputline = reader.readline();       }       catch(ioexception e)       {  system.out.println(e);          system.exit(1);       }        return inputline;    }     private bufferedreader reader;  } 

 string option = console.readline();           while(option.equalsignorecase("get balance")){              system.out.println(account.getbalance());  //go if after excecutes              option =  console.readline();           } 

simple loop should ok solve it. please notice should read console once again after line executes prevent infinite loop.