java股票类包括代码名称前一日收款价当前价，涨跌幅度，涨跌价格。方法获取当前价格，计算涨幅

在Java中，你可以创建一个名为`Stock`的类来表示股票的基本信息，如代码名称、昨日收盘价、当前价格、涨跌幅度和涨跌金额。这里是一个简单的例子：

public class Stock {
    private String codeName;
    private double yesterdayClosingPrice;
    private double currentPrice;
    private double changeRate;
    private double changeAmount;

    // 构造函数
    public Stock(String codeName, double yesterdayClosingPrice, double currentPrice) {
        this.codeName = codeName;
        this.yesterdayClosingPrice = yesterdayClosingPrice;
        this.currentPrice = currentPrice;
        calculateChange();
    }

    // 获取当前价格的方法
    public double getCurrentPrice() {
        return currentPrice;
    }

    // 计算涨幅和涨跌金额的方法
    private void calculateChange() {
        if (yesterdayClosingPrice > 0) {
            changeRate = (currentPrice - yesterdayClosingPrice) / yesterdayClosingPrice * 100;
            changeAmount = currentPrice - yesterdayClosingPrice;
        } else {
            throw new IllegalStateException("Cannot calculate change with a zero or negative previous price");
        }
    }

    // 如果需要提供获取涨跌幅和涨跌金额的方法
    public double getChangeRate() {
        return changeRate;
    }

    public double getChangeAmount() {
        return changeAmount;
    }

    // 示例如何使用
    public static void main(String[] args) {
        Stock stock = new Stock("AAPL", 145.20, 150.50);
        System.out.println("Code Name: " + stock.getCodeName());
        System.out.println("Current Price: " + stock.getCurrentPrice());
        System.out.println("Change Rate: " + stock.getChangeRate() + "%");
        System.out.println("Change Amount: $" + stock.getChangeAmount());
    }
}