java是否可以在一行代码中执行两个不同的“+=”和“=”操作？

Question

我刚刚开始自学java，我想知道是否有一个操作（可能是“and then”操作）允许我在同一行上执行两个数学计算。保持“余额”的最新总额很重要。这是我的代码：

public static void main(String[] args) {
  double balance = 5400d;
  double withdrawalAmount = 2100d;
  double depositAmount = 1100d;

  //Total Balance after primary transactions 
  // (This line of code works but I want to update "balance" after every calculation
  System.out.println(balance - withdrawalAmount + depositAmount); 

  //This updates the balance after withdrawing money    
  System.out.println(balance -= withdrawalAmount);

  //This updates balance after depositing money    
  System.out.println(balance += depositAmount);

  //Here is where I was trying to combine both operations but it did not like this very much    
  System.out.println(balance -= withdrawalAmount && balance += depositAmount);
  }

Answer 1

您只需在一行中完成：

System.out.println(balance = balance - withdrawalAmount + depositAmount);

Answer 2

没有Java语法可以做到这一点，但您仍然可以使用简单的数学来做到这一点

您要执行以下操作：

X = X  - y + z

这里不需要两个作业。您只需减去一个值，再加上另一个值，然后再将单个赋值返回到X