Java中的简单重构（基础知识）

Question

我有两个用于创建BankAccount的构造函数

DRY

我想重构它并遵守public BankAccount(int accountNumber) { // TODO Auto-generated constructor stub BankAccount(accountNumber,0.0); } public BankAccount(int accountNumber , double balance) { // TODO Auto-generated constructor stub this.accountNumber = accountNumber; this.balance = balance; System.out.println(this.accountNumber+" "+this.balance); } （不要重复自己）原则。我写了这个，但它引起了错误......请帮助......

select * from tablename
where id like :bindVariable

Answer 1

使用this

public BankAccount(int accountNumber) {
    this(accountNumber,0.0);
}

Answer 2

检查以下代码：

public class BankAccount {
    int accountNumber;
    double balance;
    public BankAccount(int accountNumber) {
        // TODO Auto-generated constructor stub
        this(accountNumber, 0.0);
    }

    public BankAccount(int accountNumber , double balance) {
        // TODO Auto-generated constructor stub
        this.accountNumber =accountNumber;
        this.balance = balance;

        System.out.println(this.accountNumber+"    "+this.balance);

    }
}

编译好。您将this与构造函数一起使用，因为它们不是方法。