java - Combining two accounts -

this homework assignment. need consolidate 2 accounts (acct2 , acct3) , produce third 1 same name, different account number , $200. have close first 2 accounts. not issue though. can work fine if not declare public static account accountconsolidate(account acct1, account acct2) static method, , create object in main. not work though because required declare method static. also, if declare static can proper return value in if(acct1.name.equalsignorecase(acct2.name) && acct1.acctnum != acct2.acctnum) if exclude `&& acct1.acctnum != acct2.acctnum other wise return null ("these 2 accounts not able consolidated. please check criteria again", not sure why.

any great. thanks

import java.util.random;      public class account     {         private static int numaccounts = 0;         private double balance;         private static string name;         private static double acctnum;         static random gen = new random();      //-------------------------------------------------     //constructor -- initializes balance, owner, , account number     //-------------------------------------------------         public account(double initbal, string owner, double number)         {             balance = initbal;             name = owner;             acctnum = number;             numaccounts++;         }          public account(double initbal, string owner)         {             balance = initbal;             name = owner;             acctnum =  math.abs(gen.nextdouble());             numaccounts++;         }          public account(string owner)         {             balance = 0;             name = owner;             acctnum =  math.abs(gen.nextdouble());             numaccounts++;         }      //-------------------------------------------------     // checks see if balance sufficient withdrawal.     // if so, decrements balance amount; if not, prints message.     //-------------------------------------------------         public void withdraw(double amount)         {             if (balance >= amount)             {                    balance -= amount;             }                else                 system.out.println("insufficient funds");         }          public void withdraw(double amount, double fee)         {             if (balance >= amount)                 {                     balance -= amount;                     balance -= fee;                  }                else                 system.out.println("insufficient funds");            }      public string getname()     {         return name;     }      public double getnum()     {         return acctnum;     }      //-------------------------------------------------     // adds deposit amount balance.     //-------------------------------------------------         public void deposit(double amount)         {             balance += amount;         }      //-------------------------------------------------     // returns balance.     //-------------------------------------------------         public double getbalance()         {             return balance;         }      // static method keep track of incrementing account         public static int getnumaccounts()         {             return numaccounts;         }      // close account         public void close()         {             balance = 0;             name = "closed";             numaccounts--;         }       // consolidate accounts         public static account accountconsolidate(account acct1, account acct2)         {              if(acct1.name.equalsignorecase(acct2.name)  && acct1.acctnum != acct2.acctnum)             {                 account account2 = new account(0, acct1.name);                 account2.balance = acct1.getbalance() + acct2.getbalance();                  acctnum = math.abs(gen.nextdouble());                  acct1.close();                 acct2.close();                   return account2;              }             else             {                 system.out.println("these 2 accounts not able consolidated. please check criteria again");                 return null;             }            }      //-------------------------------------------------     // returns string containing name, account number, , balance.     //-------------------------------------------------         public string tostring()         {             return "name:" + name +                 "\naccount number: " + acctnum +                 "\nbalance: " + balance;         }     }  //************************************************************ //testaccounts1 //a simple program test numaccts method of //account class. //************************************************************ import java.util.scanner;      public class testaccount1     {         public static void main(string[] args)         {             string name1;             string name2;             string name3;              scanner scan = new scanner(system.in);              system.out.print("please enter name account 1: ");             name1 = scan.nextline();             account acct1 = new account (100, name1);             system.out.println(acct1);             system.out.println("now there " + account.getnumaccounts() + " accounts");             system.out.println("");              system.out.print("please enter name account 2: ");             name2 = scan.nextline();             account acct2 = new account (100, name2);             system.out.println(acct2);             system.out.println("now there " + account.getnumaccounts() + " accounts");             system.out.println("");              system.out.print("please enter name account 3: ");             name3 = scan.nextline();             account acct3 = new account (100, name3);             system.out.println(acct3);             system.out.println("now there " + account.getnumaccounts() + " accounts");             system.out.println("");              acct1.close();             system.out.println("");             system.out.println("there "  + account.getnumaccounts() + " accounts");               system.out.println("accounts consolidated");             system.out.println(account.accountconsolidate(acct2, acct3)); } } 

your account numbers randomly generated accnum static. every account have created account number of last account. acct1.acctnum != acct2.acctnum false.

your account name static well, each account have account name of last created account.

after changed read compiler errors. tell next. think variables of object modify. acctnum = math.abs(gen.nextdouble()); not set account number of consolidated account account2.