Java 添加数字格式选项

我试图在这个基本程序中为

int

变量添加整数逗号（$40000 vs$40000）

我目前正在

system.out.println（）中使用它们

有没有办法更早或更顺利地实施它

import java.text.NumberFormat;
import java.util.Locale;

public class Employee {

private String name;
private int salary;
private int bonus;

public Employee(String theirName, int theirSalary, int plusBonus) {
    name = theirName;
    salary = theirSalary;
    bonus = plusBonus;
}

public String gettheirname() {
    return name;}

public int gettheirSalary() {
    return salary;}

public int getplusBonus() {
    return bonus;}


public static void main(String[] args) {
    Employee e1 = new Employee("Liberty Zapata", 40000, 500);
    System.out.println("ZIG Payroll");
    System.out.println("\t-----------\t Employee \t-----------\t");
    System.out.println("Employee name:" + e1.gettheirname());
    System.out.println( "Salary before bonus: $" + NumberFormat.getNumberInstance(Locale.US).format((e1.gettheirSalary())));
    System.out.println("Bonus: $" +e1.getplusBonus());
    System.out.println("Salary plus bonus: $" + NumberFormat.getNumberInstance(Locale.US).format((e1.getplusBonus()+ e1.gettheirSalary()))) ;
}


}

当然，您可以向class
Employee
a
toString
表示添加并使用它，例如：

@Override
public String toString() {
    return
            "Employee name:" + name + "\n" +
            "Salary before bonus: $" + NumberFormat.getNumberInstance(Locale.US).format(salary) + "\n" +
            "Bonus: $" + bonus + "\n" +
            "Salary plus bonus: $" + NumberFormat.getNumberInstance(Locale.US).format(bonus + salary);
}

用法：

public static void main(String[] args) {
    Employee e1 = new Employee("Liberty Zapata", 40000, 500);
    System.out.println("ZIG Payroll");
    System.out.println("\t-----------\t Employee \t-----------\t");
    System.out.println(e1) ; // <--- here, now it's simple!
}

谢谢你的帮助！@Override在这里是如何工作的？@HMartinez
@Override
注释简单地指示构造函数此方法正在重写父类中的方法（
在本例中为Object
）。它的目的是防止您不正当地使用此注释（例如，父方法具有不同的签名），编译器将失败并提供明确的错误消息。
ZIG Payroll
    -----------  Employee   ----------- 
Employee name:Liberty Zapata
Salary before bonus: $40,000
Bonus: $500
Salary plus bonus: $40,500