import com.sun.tools.apt.mirror.declaration.MethodDeclarationImpl; //导入依赖的package包/类
/**
 * {@inheritDoc}
 * See JLS 2 section 8.4.6.1.
 */
public boolean overrides(MethodDeclaration sub, MethodDeclaration sup) {
    MethodSymbol overrider = ((MethodDeclarationImpl) sub).sym;
    MethodSymbol overridee = ((MethodDeclarationImpl) sup).sym;
    ClassSymbol origin = (ClassSymbol) overrider.owner;

    return overrider.name == overridee.name &&

           // not reflexive as per JLS
           overrider != overridee &&

           // we don't care if overridee is static, though that wouldn't
           // compile
           !overrider.isStatic() &&

           // overrider, whose declaring type is the origin, must be
           // in a subtype of overridee's type
           env.jctypes.asSuper(origin.type, overridee.owner) != null &&

           // check access and signatures; don't check return types
           overrider.overrides(overridee, origin, env.jctypes, false);
}
 

import com.sun.tools.apt.mirror.declaration.MethodDeclarationImpl; //导入依赖的package包/类
/**
 * {@inheritDoc}
 * See section 8.4.6.1 of
 * <cite>The Java&trade; Language Specification</cite>
 */
public boolean overrides(MethodDeclaration sub, MethodDeclaration sup) {
    MethodSymbol overrider = ((MethodDeclarationImpl) sub).sym;
    MethodSymbol overridee = ((MethodDeclarationImpl) sup).sym;
    ClassSymbol origin = (ClassSymbol) overrider.owner;

    return overrider.name == overridee.name &&

           // not reflexive as per JLS
           overrider != overridee &&

           // we don't care if overridee is static, though that wouldn't
           // compile
           !overrider.isStatic() &&

           // overrider, whose declaring type is the origin, must be
           // in a subtype of overridee's type
           env.jctypes.asSuper(origin.type, overridee.owner) != null &&

           // check access and signatures; don't check return types
           overrider.overrides(overridee, origin, env.jctypes, false);
}