救命啊,哪错了,大侠帮看看啊

package xian;
public class xian1{
    public static void main(String[] args){
    Scanner scanner = new Scanner(System.in);
    
    System.out.print("请输入学生分数: ");
    int scoreOfStudent = scanner.nextInt();
    System.out.println("该生是否及格? " +
            (scoreOfStudent >= 60 ? '是' : '否'));
    }
}


错误显示,
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
    Scanner cannot be resolved to a type
    Scanner cannot be resolved to a type

    at xian.xian1.main(xian1.java:4)
----------------解决方案--------------------------------------------------------
在package xian;后面加上：
import java.util.*;
----------------解决方案--------------------------------------------------------
应该是少了一些包了吧?
----------------解决方案--------------------------------------------------------
如果你用的是Eclipse，按一下Ctrl+Shift+O（字母O）就可以了
----------------解决方案--------------------------------------------------------
谢谢了,成了!!
----------------解决方案--------------------------------------------------------
少了包的引入啊
----------------解决方案--------------------------------------------------------
少了包的引入啊
----------------解决方案--------------------------------------------------------
少了import java.util.*;
此外，还要刨出IOException
----------------解决方案--------------------------------------------------------