关于Java：将项目导入到另一台计算机时发生编码错误

Coding error when importing project to another computer

我有一个项目，我创建的工作完美，没有任何错误，在家里做。然而，当我把这个项目导入学校的计算机时，我从两个不同的类中得到了两个代码错误。

第一误差

主类

1	bank.getAccounts().forEach((i,b)->System.out.println(b));

Illegal start of type ) expected;

Illegal start of expression ; expected;

第二误差

BankProcess类

1	bankAccounts.remove(bankAccount.getAccountId(), bankAccount);

No suitable methods found for remove....

我可以这样吗？家庭计算机上不会出现此类错误。

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package Coursework1;
import java.util.*;

public class Bank {

//Creates a new treemap in which Bank Accounts will be stored in.
private TreeMap < Integer, BankAccount > bankAccounts = new TreeMap < Integer, BankAccount > ();

//This method returns all bank accounts in the treemap.
public TreeMap < Integer, BankAccount > getAccounts() {
return bankAccounts;
}

//This method adds a bank account to the treemap.
public void setAccounts(TreeMap < Integer, BankAccount > accounts) {
this.bankAccounts = accounts;
}

//This method return a bank account using the account number.
public BankAccount getAccount(Integer accountNumber) {
return bankAccounts.get(accountNumber);
}

//This method removes a bank account from the treemap.
public void removeAccounts(TreeMap < Integer, BankAccount > accounts) {
this.bankAccounts = accounts;
}
}