Java printDailyCost 方法

Question

我被要求实现一个 printDailyCost 方法，该方法应该调用 getDailyCost 方法并将返回的值格式化为 2 小数位。然后它应该打印这个值以及一个 £ 符号。

到目前为止我已经:

public abstract class Suit {

    private String colour;
    private double dailyCost;
    private int trouserLength;
    private int jacketChestSize;
    private boolean available;
    private double totalPrice;

    public Suit(String colour, double dailyCost, int trouserLength, 
                int jacketChestSize, boolean available, double totalPrice) {
        super();
        this.colour = colour;
        this.dailyCost = dailyCost;
        this.trouserLength = trouserLength;
        this.jacketChestSize = jacketChestSize;
        this.available = available;
        this.totalPrice = totalPrice;
    }

    public String getColour() {
        return colour;
    }

    public double getDailyCost() {
        return dailyCost;
    }

    public int getTrouserLength() {
        return trouserLength;
    }

    public int getJacketChestSize() {
        return jacketChestSize;
    }

    public boolean isAvailable() {
        return available;
    }

    public double getTotalPrice() {
        return totalPrice;
    }

    public void setColour(String colour) {
        this.colour = colour;
    }

    public void setDailyCost(double dailyCost) {
        this.dailyCost = dailyCost;
    }

    public void setTrouserLength(int trouserLength) {
        this.trouserLength = trouserLength;
    }

    public void setJacketChestSize(int jacketChestSize) {
        this.jacketChestSize = jacketChestSize;
    }

    public void setAvailable(boolean available) {
        this.available = available;
    }

    public void setTotalPrice(double totalPrice) {
        this.totalPrice = totalPrice;
    }

    public void calcTotalPrice(int numDaysHired){
        this.totalPrice = dailyCost * numDaysHired;
    }

    public String printDailyCost() {
        return printDailyCost();        
    }
}

我的问题是如何修改 printDailyCost 方法以调用 getDailyCost 方法并将返回的值格式化为 2 小数位然后用 £ 符号打印？

Answer 1

看看这个:

    java.text.NumberFormat format = java.text.NumberFormat.getCurrencyInstance(java.util.Locale.UK);
    System.out.println(format.format(getDailyCost()));