java - 如果没有调用其他方法，我将如何调用一个方法？

Question

我正在尝试设置一个包含特定值的类，然后可以将其用作默认值。例如:

public class Account {
  private GUID;
  private balance;

  public Account(int balance) {
    this.balance = balance;
    this.GUID = new GUID();
  }

  public getBalance() {
    return this.balance;
  }

然后在使用过程中我会以某种方式完成这项工作:

Account test = new Account(40);
System.out.println("Account balance: " + test);

这将返回:帐户余额:40

不必写:

Account test = new Account(40);
System.out.println("Account balance: " + test.getBalance());

有没有办法在Java中做到这一点？

Answer 1

做这样的事情。

public class Account {
   private GUID guid;
   private int balannce;

 public Account(int balance) {
    this.balance = balance;
    this.guid = new GUID();
  }

  public getBalance() {
    return this.balance; 
  }      

  @Override
  public String toString() {
    return String.format("%03d", balance);
  }
}