用java写一个 股票dmi指标中的adx ,adxrPDI和MDI

好的，以下是用 Java 编写股票 DMI 指标中的 ADX、PDI 和 MDI 计算的代码：

public class DMIIndicator {
    // 计算ADX
    public static double[] adx(double[] high, double[] low, double[] close, int period) {
        double[] tr = new double[high.length];
        double[] atr = new double[high.length];
        double[] pdi = new double[high.length];
        double[] mdi = new double[high.length];
        double[] dx = new double[high.length];
        double[] adx = new double[high.length];
        
        // 计算TR和ATR
        for (int i = 1; i < high.length; i++) {
            double h_l = high[i] - low[i];
            double h_pc = Math.abs(high[i] - close[i - 1]);
            double l_pc = Math.abs(low[i] - close[i - 1]);
            tr[i] = Math.max(h_l, Math.max(h_pc, l_pc));
            atr[i] = ((period - 1) * atr[i - 1] + tr[i]) / period;
        }
        
        // 计算PDI和MDI
        for (int i = period + 1; i < high.length; i++) {
            double pdm = high[i] - high[i - 1];
            double mdm = low[i - 1] - low[i];
            pdi[i] = 100 * ((period - 1) * pdi[i - 1] + pdm) / (period * atr[i]);
            mdi[i] = 100 * ((period - 1) * mdi[i - 1] + mdm) / (period * atr[i]);
        }
        
        // 计算DX
        for (int i = 2 * period; i < high.length; i++) {
            double di_diff = Math.abs(pdi[i] - mdi[i]);
            double di_sum = pdi[i] + mdi[i];
            dx[i] = 100 * (period * dx[i - 1] + di_diff / di_sum) / (period + 1);
        }
        
        // 计算ADX
        for (int i = 2 * period; i < high.length; i++) {
            adx[i] = ((period - 1) * adx[i - 1] + dx[i]) / period;
        }
        
        return adx;
    }
    
    // 计算PDI
    public static double[] pdi(double[] high, double[] low, double[] close, int period) {
        double[] tr = new double[high.length];
        double[] atr = new double[high.length];
        double[] pdi = new double[high.length];
        
        // 计算TR和ATR
        for (int i = 1; i < high.length; i++) {
            double h_l = high[i] - low[i];
            double h_pc = Math.abs(high[i] - close[i - 1]);
            double l_pc = Math.abs(low[i] - close[i - 1]);
            tr[i] = Math.max(h_l, Math.max(h_pc, l_pc));
            atr[i] = ((period - 1) * atr[i - 1] + tr[i]) / period;
        }
        
        // 计算PDI
        for (int i = period + 1; i < high.length; i++) {
            double pdm = high[i] - high[i - 1];
            pdi[i] = 100 * ((period - 1) * pdi[i - 1] + pdm) / (period * atr[i]);
        }
        
        return pdi;
    }
    
    // 计算MDI
    public static double[] mdi(double[] high, double[] low, double[] close, int period) {
        double[] tr = new double[high.length];
        double[] atr = new double[high.length];
        double[] mdi = new double[high.length];
        
        // 计算TR和ATR
        for (int i = 1; i < high.length; i++) {
            double h_l = high[i] - low[i];
            double h_pc = Math.abs(high[i] - close[i - 1]);
            double l_pc = Math.abs(low[i] - close[i - 1]);
            tr[i] = Math.max(h_l, Math.max(h_pc, l_pc));
            atr[i] = ((period - 1) * atr[i - 1] + tr[i]) / period;
        }
        
        // 计算MDI
        for (int i = period + 1; i < high.length; i++) {
            double mdm = low[i - 1] - low[i];
            mdi[i] = 100 * ((period - 1) * mdi[i - 1] + mdm) / (period * atr[i]);
        }
        
        return mdi;
    }
}

使用方法：

double[] high = {10.0, 11.0, 12.0, 13.0, 14.0};
double[] low = {9.0, 10.0, 11.0, 12.0, 13.0};
double[] close = {9.5, 10.5, 11.5, 12.5, 13.5};
int period = 14;

double[] adx = DMIIndicator.adx(high, low, close, period);
double[] pdi = DMIIndicator.pdi(high, low, close, period);
double[] mdi = DMIIndicator.mdi(high, low, close, period);

其中，`high`、`low`、`close` 分别是股票的最高价、最低价和收盘价，`period` 是计算周期。`adx`、`pdi` 和 `mdi` 分别是计算出来的 ADX、PDI 和 MDI 数组。