java异常处理

public class TestException {
    public static void main(String[] args) {
        int[] arr = {11,22,33};

        try {
          System.out.println(arr[5]);
        } catch (Exception ex) {}

        try {
            //saveAge(100);
            saveAge(200);
            System.out.println("底层是成功执行的");
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("底层出现了bug");
        }

        try {
            saveAge2(200);
            System.out.println("saveAge2底层是成功执行的");
        } catch (AgellegalException e) {
            e.printStackTrace();
            System.out.println("saveAge2底层出现了bug");
        }
    }

    public static void  saveAge(int age) {
        if (age > 0 && age < 150) {
            System.out.println("年龄被成功保存" + age);
        } else {
            throw new AgellegalRuntimeException("/age is illegal ,you age is" + age);
        }
    }

    public static void  saveAge2(int age) throws  AgellegalException {
        if (age > 0 && age < 150) {
            System.out.println("年龄被成功保存" + age);
        } else {
            throw new AgellegalException("/age is illegal ,you age is" + age);
        }
    }


}
class  AgellegalException extends Exception {
    public AgellegalException() {
    }

    public AgellegalException(String message) {
        super(message);
    }
}
class  AgellegalRuntimeException extends  RuntimeException {
    public AgellegalRuntimeException() {
    }

    public AgellegalRuntimeException(String message) {
        super(message);
    }
}

如何应用，

实际工作当中， 强烈需要程序员处理该异常的就抛一个编译型异常； 

一般情况就用运行时异常。