求教在 OS X 下的关于 Java 编程问题

最近在学java，然后对着书（Java语言程序设计 Y.Daniel Liang）的例子打code

结果编译时报错

code：

import java.utill.Scanner; // Scanner is in the java.utill package

public class ComputeAreaWithConsoleInput{
public static void main(String[] args) {
//Create a Scanner object
Scanner input = new Scanner(System.in);

//Prompt the user to enter a radius
System.out.print("Enter a number for radius: ");
double radius = input.nextDouble();

//Cpmpute area
double area = radius * radius * 3.14159;

//Display result
System.out.println("The area for the circle of radius "+
radius +" is "+ area);
}
}

报错内容：
/Users/oscarzhoud/Desktop/java/boook/p21/ComputeAreaWithConsoleInput.java:1: 错误: 程序包java.utill不存在
import java.utill.Scanner; // Scanner is in the java.utill package
^
/Users/oscarzhoud/Desktop/java/boook/p21/ComputeAreaWithConsoleInput.java:6: 错误: 找不到符号
Scanner input = new Scanner(System.in);
^
符号: 类 Scanner
位置: 类 ComputeAreaWithConsoleInput
/Users/oscarzhoud/Desktop/java/boook/p21/ComputeAreaWithConsoleInput.java:6: 错误: 找不到符号
Scanner input = new Scanner(System.in);
^
符号: 类 Scanner
位置: 类 ComputeAreaWithConsoleInput
3 个错误
[Finished in 1.5s with exit code 1]




提问：java.utill难道不是JDK自带的咩- -为啥在编译时会这样呢
呜呜，已经自己试过各种方法没解决，来到这里找人求助，java初学者，如果问题很弱智，求轻喷