无法对非静态字段进行静态引用如果此代码格式不正确，我会提前道歉，尝试粘贴而不是重新输入每一行。如果它不对，有人可以告诉我一次粘贴多行代码的简单方法吗？我的主要问题是我不断收到一条错误消息： Cannot make a static reference to the non-static field balance.我试过使方法静态，没有结果，并通过从标题中删除“静态”使主方法非静态，但后来我收到消息： java.lang.NoSuchMethodError: main Exception in thread "main"有没有人有任何想法？任何帮助表示赞赏。public class Account {
public static void main(String[] args) {
Account account = new Account(1122, 20000, 4.5);
account.withdraw(balance, 2500);
account.deposit(balance, 3000);
System.out.println("Balance is " + account.getBalance());
System.out.println("Monthly interest is " + (account.getAnnualInterestRate()/12));
System.out.println("The account was created " + account.getDateCreated());
}
private int id = 0;
private double balance = 0;
private double annualInterestRate = 0;
public java.util.Date dateCreated;
public Account() {
}
public Account(int id, double balance, double annualInterestRate) {
this.id = id;
this.balance = balance;
this.annualInterestRate = annualInterestRate;
}
public void setId(int i) {
id = i;
}
public int getID() {
return id;
}
public void setBalance(double b){
balance = b;
}
public double getBalance() {
return balance;
}
public double getAnnualInterestRate() {
return annualInterestRate;
}
public void setAnnualInterestRate(double interest) {
annualInterestRate = interest;
}
public java.util.Date getDateCreated() {
return this.dateCreated;
}
public void setDateCreated(java.util.Date dateCreated) {
this.dateCreated = dateCreated;
}
public static double withdraw(double balance, double withdrawAmount) {
double newBalance = balance - withdrawAmount;
return newBalance;
}
public static double deposit(double balance, double depositAmount) {
double newBalance = balance + depositAmount;
return newBalance;
} }
3 回答
慕的地6264312
TA贡献1817条经验 获得超6个赞
main是一种静态方法。它不能引用balance，这是一个属性（非静态变量）。 balance仅在通过对象引用（例如myAccount.balance或yourAccount.balance）引用时才有意义。但是当它通过类引用时没有任何意义（例如Account.balance（它的平衡是什么？））
我对您的代码进行了一些更改，以便进行编译。
public static void main(String[] args) {
Account account = new Account(1122, 20000, 4.5);
account.withdraw(2500);
account.deposit(3000);和：
public void withdraw(double withdrawAmount) {
balance -= withdrawAmount;}public void deposit(double depositAmount) {
balance += depositAmount;}
喵喔喔
TA贡献1735条经验 获得超5个赞
线条
account.withdraw(balance, 2500);account.deposit(balance, 3000);
你可能想要撤销和存入非静态，并让它修改余额
public void withdraw(double withdrawAmount) {
balance = balance - withdrawAmount;}public void deposit(double depositAmount) {
balance = balance + depositAmount;}并从通话中删除balance参数
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