异常

package com.day11;
import java.util.*;
public class Demo1 {
    public static void main(String[] args) {
        System.out.print("请输入课程代号(1～3之间的数字):");
        Scanner in = new Scanner(System.in);
        try {
            int courseCode = in.nextInt();
            switch (courseCode) {
                case 1:
                    System.out.println("111编程");
                    break;
                case 2:
                    System.out.println("222编程");
                    break;
                case 3:
                    System.out.println("333编程");
            }
        } catch (Exception ex) {
            System.out.println("输入不为数字!");
            ex.printStackTrace();
        } finally {
            System.out.println("欢迎提出建议!");
        }
    }
}

 

2.

package com.day11;

public class People {
    private int age = 0;
    public void setAge(int age) throws Exception {
        if (age>=1 && age<=100)
            this.age = age;
        else {
            throw new Exception("年龄必须在1到100之间！");
        }
    }
}

package com.day11;

public class Test {
    public static void main(String[] args) {
        People people = new People();
        try {
            people.setAge(110);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}