【JAVA应用】自定义Exception异常类

写出自定义异常类，继承Exception类

package cn.edu.error;

public class MyException extends Exception{
	private int id;
	public MyException(String message,int id){
		super(message);
		this.id=id;
	}

	public int getId(){
		return this.id;
	}
}

实验类TestMyEx.java: 

package cn.edu.error;

public class TestMyEx {
	//<span style="font-family: Arial, Helvetica, sans-serif;">登记</span><span style="font-family: Arial, Helvetica, sans-serif;">学生人数的小程序</span>
	public void regist(int num) throws MyException{
		if(num<0){
			throw new MyException("人数为负值，不合理",3);
		}
		System.out.println("登记人数"+num);
	}

	public void manager(){
		try{regist(100);}
		catch(MyException e){
			System.out.println
			("登记失败，出错类型码="+e.getId());
			e.printStackTrace();
		}
		System.out.println("操作结束");
	}
	public static void main(String[] args) {
		TestMyEx tme=new TestMyEx();
		tme.manager();
	}

}

结果：

登记人数100
操作结束

将regist(100);改为regist(-100);
结果变为：

登记失败，出错类型码=3
cn.edu.error.MyException: 人数为负值，不合理
	at cn.edu.error.TestMyEx.regist(TestMyEx.java:7)
	at cn.edu.error.TestMyEx.manager(TestMyEx.java:13)
	at cn.edu.error.TestMyEx.main(TestMyEx.java:23)
操作结束

转载请注明出处！程序猿之洞：http://blog.csdn.net/acmman/