private HashMap<Integer, Account> accountMap;
此地图中有帐户对象。
我想要做的是按键合并对象，然后将帐号2对象添加到帐户1，并从地图中删除帐户2。
此方法属于银行类：
public void combineAccounts(int uid1, int uid2) {
Account x = new Account(uid1);
x.add(accountMap.get(uid1),accountMap.get(uid2));
}
Account.class： a1.getValuables返回列表obj：[Value：16253.0 - ＆gt; 100.0gr金]
public class Account{
private final int uid;
private final List<Valuable> valuables;
public Account(int uid) {
this.uid = uid;
valuables = new ArrayList<>();
}
public void addValuable(Valuable valuable){
valuables.add(valuable);
}
/*implementation of getTotalValue method comes here*/
public double getTotalValue(){
return 0;
//returns total amount of valuables present in that account
}
public Account add(Account a1,Account a2){
Account mergedaccount;
mergedaccount = a1.getValuables()+a2.getValuables() // something like this...
return mergedaccount;
}
public int getUid() {
return uid;
}
public List<Valuable> getValuables() {
return valuables;
}
public void sortValuables(){
Collections.sort(valuables);
}
@Override
public String toString() {
return "uid:" + uid + " " + valuables;
}
}
Bank.class：
public class Bank {
private HashMap<Integer, Account> accountMap;
private Account merged;
public Bank() {
accountMap = new HashMap<>();
}
/*implementation of createAccount method comes here*/
public void createAccount(int uid){
for (HashMap.Entry<Integer, Account> entry : accountMap.entrySet()) {
if(entry.getKey() == uid){
throw new IllegalArgumentException();
}
}
accountMap.put(uid,new Account(uid));
// creates an account of id uid, if that account already exists an exception is thrown
}
public Account getAccount(int uid){
return accountMap.get(uid);
}
@Override
public String toString() {
Collection<Account> accounts = accountMap.values();
return accounts.toString();
}
public void addValuable(int uid, Valuable valuable) {
if(accountMap.get(uid) ==null){
System.out.println("valuables could not be added, no such account");
return;
}else{
accountMap.get(uid).addValuable(valuable);
}
//Add valuable to an existing account, if the account does not exist, an error message should be printed.
}
public void combineAccounts(int uid1, int uid2) {
Account x = new Account(uid1);
x.add(accountMap.get(uid1),accountMap.get(uid2));
}
public void closeAccount(int uid) {
if(accountMap.get(uid) != null){
accountMap.remove(uid);
}else{
throw new IllegalArgumentException();
}
}
}