11.9 custom exception class

Implement a custom exception class inherits only Exception (mandatory exception handling) or a RuntimeException (selective exception handling) to the parent
Example: Implementing custom exception

package cn.mldn.demo;
class BombException extends Exception {	// 自定义强制处理异常
	public BombException(String msg) {
		super(msg);	// 调用父类构造
	}
}
class Food {
	public static void eat(int num) throws BombException {// 吃饭有可能会吃炸肚子
		if (num > 9999) {// 吃了多碗米饭
			throw new BombException("米饭吃太多了，肚子爆了。");
		} else {
			System.out.println("正常开始吃，不怕吃胖。");
		}
	}
}
public class JavaDemo {
	public static void main(String args[]) {
		try {
			Food.eat(11);	// 传入要吃的数量
		} catch (BombException e) {
			e.printStackTrace();
		}
	}
}

The results of
normal start to eat, afraid of Chi Pang