import com.sun.mirror.type.PrimitiveType.Kind; //导入依赖的package包/类
/**
 * Converts a primitive data type to the equivalent {@link Class} type.
 * 
 * @param kind
 *            The {@link PrimitiveType.Kind} to convert.
 * @return The equivalent {@link Class} of the primitive type.
 */
public static Class<?> convertPrimitiveToClass(Kind kind) {
	if (kind.equals(Kind.BOOLEAN)) {
		return Boolean.class;
	} else if (kind.equals(Kind.BYTE)) {
		return Byte.class;
	} else if (kind.equals(Kind.CHAR)) {
		return Character.class;
	} else if (kind.equals(Kind.DOUBLE)) {
		return Double.class;
	} else if (kind.equals(Kind.FLOAT)) {
		return Float.class;
	} else if (kind.equals(Kind.INT)) {
		return Integer.class;
	} else if (kind.equals(Kind.LONG)) {
		return Long.class;
	} else if (kind.equals(Kind.SHORT)) {
		return Short.class;
	} else {
		throw new IllegalStateException("The PrimitiveType Kind " + 
				kind.name() + " is not recognized. This exception " +
						"should never be thrown.");
	}
}
 

import com.sun.mirror.type.PrimitiveType.Kind; //导入依赖的package包/类
private TypeMaker(Context context) {
    context.put(typeMakerKey, this);
    env = AptEnv.instance(context);

    voidType = new VoidTypeImpl(env);
    primTypes[BOOLEAN] = new PrimitiveTypeImpl(env, Kind.BOOLEAN);
    primTypes[BYTE]    = new PrimitiveTypeImpl(env, Kind.BYTE);
    primTypes[SHORT]   = new PrimitiveTypeImpl(env, Kind.SHORT);
    primTypes[INT]     = new PrimitiveTypeImpl(env, Kind.INT);
    primTypes[LONG]    = new PrimitiveTypeImpl(env, Kind.LONG);
    primTypes[CHAR]    = new PrimitiveTypeImpl(env, Kind.CHAR);
    primTypes[FLOAT]   = new PrimitiveTypeImpl(env, Kind.FLOAT);
    primTypes[DOUBLE]  = new PrimitiveTypeImpl(env, Kind.DOUBLE);
}