import com.sun.tools.apt.mirror.declaration.DeclarationImpl; //导入依赖的package包/类
/**
 * {@inheritDoc}
 * See JLS 2 sections 8.3 and 8.4.6.
 */
public boolean hides(MemberDeclaration sub, MemberDeclaration sup) {
    Symbol hider = ((DeclarationImpl) sub).sym;
    Symbol hidee = ((DeclarationImpl) sup).sym;

    // Fields only hide fields; methods only methods; types only types.
    // Names must match.  Nothing hides itself (just try it).
    if (hider == hidee ||
            hider.kind != hidee.kind ||
            hider.name != hidee.name) {
        return false;
    }

    // Only static methods can hide other methods.
    // Methods only hide methods with matching signatures.
    if (hider.kind == MTH) {
        if ((hider.flags() & Flags.STATIC) == 0 ||
                    !env.jctypes.isSubSignature(hider.type, hidee.type)) {
            return false;
        }
    }

    // Hider must be in a subclass of hidee's class.
    // Note that if M1 hides M2, and M2 hides M3, and M3 is accessible
    // in M1's class, then M1 and M2 both hide M3.
    ClassSymbol hiderClass = hider.owner.enclClass();
    ClassSymbol hideeClass = hidee.owner.enclClass();
    if (hiderClass == null || hideeClass == null ||
            !hiderClass.isSubClass(hideeClass, env.jctypes)) {
        return false;
    }

    // Hidee must be accessible in hider's class.
    // The method isInheritedIn is poorly named:  it checks only access.
    return hidee.isInheritedIn(hiderClass, env.jctypes);
}
 

import com.sun.tools.apt.mirror.declaration.DeclarationImpl; //导入依赖的package包/类
/**
 * {@inheritDoc}
 * See sections 8.3 and 8.4.6 of
 * <cite>The Java&trade; Language Specification</cite>
 */
public boolean hides(MemberDeclaration sub, MemberDeclaration sup) {
    Symbol hider = ((DeclarationImpl) sub).sym;
    Symbol hidee = ((DeclarationImpl) sup).sym;

    // Fields only hide fields; methods only methods; types only types.
    // Names must match.  Nothing hides itself (just try it).
    if (hider == hidee ||
            hider.kind != hidee.kind ||
            hider.name != hidee.name) {
        return false;
    }

    // Only static methods can hide other methods.
    // Methods only hide methods with matching signatures.
    if (hider.kind == MTH) {
        if ((hider.flags() & Flags.STATIC) == 0 ||
                    !env.jctypes.isSubSignature(hider.type, hidee.type)) {
            return false;
        }
    }

    // Hider must be in a subclass of hidee's class.
    // Note that if M1 hides M2, and M2 hides M3, and M3 is accessible
    // in M1's class, then M1 and M2 both hide M3.
    ClassSymbol hiderClass = hider.owner.enclClass();
    ClassSymbol hideeClass = hidee.owner.enclClass();
    if (hiderClass == null || hideeClass == null ||
            !hiderClass.isSubClass(hideeClass, env.jctypes)) {
        return false;
    }

    // Hidee must be accessible in hider's class.
    // The method isInheritedIn is poorly named:  it checks only access.
    return hidee.isInheritedIn(hiderClass, env.jctypes);
}