import org.bitcoinj.utils.BtcAutoFormat.Style; //导入依赖的package包/类
/** Specify the new <code>BtcFormat</code> is to be automatically-denominating.
 * The argument determines which of either codes or symbols the new <code>BtcFormat</code>
 * will use by default to indicate the denominations it chooses when formatting values.
 *
 * <p>Note that the <code>Style</code> argument specifies the
 * <em>default</em> style, which is overridden by invoking
 * either {@link #pattern(String)} or {@link #localizedPattern(String)}.
 *
 * @throws IllegalArgumentException if {@link #scale(int)} has
 *         previously been invoked on this instance.*/
public Builder style(BtcAutoFormat.Style val) {
    if (variant == Variant.FIXED)
        throw new IllegalStateException("You cannot invoke both style() and scale()");
    variant = Variant.AUTO;
    style = val;
    return this;
}
 

import org.bitcoinj.utils.BtcAutoFormat.Style; //导入依赖的package包/类
/**
 * Return a new auto-denominating formatter.  The returned object will indicate the
 * denominational units of formatted values using either a currency symbol, such as,
 * <code>"฿"</code>, or code, such as <code>"mBTC"</code>, depending on the value of
 * the argument.  Formatting and parsing will be done according to the default locale.
 */
public static BtcFormat getInstance(Style style) { return getInstance(style, defaultLocale()); }