异常

MyException

 

package cn.lxl.trycatch;

public class MyException extends Exception {
    private static final long serialVersionUID = 1L;

    public MyException() {
        super();
    }

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

ExceptionTest

 

package cn.lxl.trycatch;

public class ExceptionTest {
    public void info(String str) throws Exception {
        if (null == str) {
            throw new MyException("传入的字符串为空值");
        }
    }
    public static void main(String[] args){
        ExceptionTest test=new ExceptionTest();
        try {
            test.info(null);
        } catch (Exception e) {
            e.printStackTrace();
        }
        finally{
            System.out.println("异常处理完毕！");
        }
        System.out.println("程序执行完毕!");
    }
}