import org.jfree.data.xy.XYDomainInfo; //导入依赖的package包/类
/**
 * Returns the bounds of the x-values in the specified <code>dataset</code>
 * taking into account only the visible series and including any x-interval
 * if requested.
 *
 * @param dataset  the dataset (<code>null</code> not permitted).
 * @param visibleSeriesKeys  the visible series keys (<code>null</code>
 *     not permitted).
 * @param includeInterval  include the x-interval (if any)?
 *
 * @return The bounds (or <code>null</code> if the dataset contains no
 *     values.
 *
 * @since 1.0.13
 */
public static Range findDomainBounds(XYDataset dataset,
        List visibleSeriesKeys, boolean includeInterval) {
    
    ParamChecks.nullNotPermitted(dataset, "dataset");
    Range result;
    if (dataset instanceof XYDomainInfo) {
        XYDomainInfo info = (XYDomainInfo) dataset;
        result = info.getDomainBounds(visibleSeriesKeys, includeInterval);
    }
    else {
        result = iterateToFindDomainBounds(dataset, visibleSeriesKeys,
                includeInterval);
    }
    return result;
}
 

import org.jfree.data.xy.XYDomainInfo; //导入依赖的package包/类
/**
 * Returns the bounds of the x-values in the specified {@code dataset}
 * taking into account only the visible series and including any x-interval
 * if requested.
 *
 * @param dataset  the dataset ({@code null} not permitted).
 * @param visibleSeriesKeys  the visible series keys ({@code null}
 *     not permitted).
 * @param includeInterval  include the x-interval (if any)?
 *
 * @return The bounds (or {@code null} if the dataset contains no
 *     values.
 *
 * @since 1.0.13
 */
public static Range findDomainBounds(XYDataset dataset,
        List visibleSeriesKeys, boolean includeInterval) {
    
    Args.nullNotPermitted(dataset, "dataset");
    Range result;
    if (dataset instanceof XYDomainInfo) {
        XYDomainInfo info = (XYDomainInfo) dataset;
        result = info.getDomainBounds(visibleSeriesKeys, includeInterval);
    }
    else {
        result = iterateToFindDomainBounds(dataset, visibleSeriesKeys,
                includeInterval);
    }
    return result;
}
 

import org.jfree.data.xy.XYDomainInfo; //导入依赖的package包/类
/**
 * Returns the bounds of the x-values in the specified <code>dataset</code>
 * taking into account only the visible series and including any x-interval
 * if requested.
 *
 * @param dataset  the dataset (<code>null</code> not permitted).
 * @param visibleSeriesKeys  the visible series keys (<code>null</code>
 *     not permitted).
 * @param includeInterval  include the x-interval (if any)?
 *
 * @return The bounds (or <code>null</code> if the dataset contains no
 *     values.
 *
 * @since 1.0.13
 */
public static Range findDomainBounds(XYDataset dataset,
        List visibleSeriesKeys, boolean includeInterval) {
    if (dataset == null) {
        throw new IllegalArgumentException("Null 'dataset' argument.");
    }
    Range result = null;
    if (dataset instanceof XYDomainInfo) {
        XYDomainInfo info = (XYDomainInfo) dataset;
        result = info.getDomainBounds(visibleSeriesKeys, includeInterval);
    }
    else {
        result = iterateToFindDomainBounds(dataset, visibleSeriesKeys,
                includeInterval);
    }
    return result;
}