异常捕获的测试

异常处理 :

 

定义几个异常 :

 

public class ExceptionA extends Exception

 

public class ExceptionB extends ExceptionA

 

测试代码: 

 

 

public class ExceptionTest {
	
	public static void main(String[] args){
		try{
			throw new ExceptionA();
		}catch (ExceptionB e) {
			// TODO: handle exception
			System.out.println("ExceptionB");
		}catch (ExceptionA e) {
			// TODO: handle exception
			System.out.println("ExceptionA");
		}
	}
	
}

 

运行结果:

 

ExceptionB

 

 

public class ExceptionTest {
	
	public static void main(String[] args){
		try{
			throw new ExceptionA();
		}catch (ExceptionA e) {
			// TODO: handle exception
			System.out.println("ExceptionB");
		}catch (ExceptionB e) {        -----------------报错
			// TODO: handle exception
			System.out.println("ExceptionA");
		}
	}
	
}