JavaSE 基础 第50节 Java中的异常链

package com.java1995;
/**
* 异常链
* @author Administrator
*
*/
public class ExceptionChainTest {

public static void main(String[] args) {

Calculator c=new Calculator();
try{
c.chufa(1, 0);
}catch(NumberCalculateException e){
e.printStackTrace();
System.out.println("错误原因"+e);
};
}

}

class Calculator{

/**
* 除法
* @return
* @throws NumberCalculateException
*/
public int chufa(int i,int j) throws NumberCalculateException{
if(j==0){
NumberCalculateException e=
new NumberCalculateException("计算错误");
NegativeNumberException e1=
new NegativeNumberException("除数不能被0");
e.initCause(e1);
throw e;
}
return 0;
};
}

class NegativeNumberException extends Exception {

public NegativeNumberException(String msg){
super(msg);
}
}

class NumberCalculateException extends Exception {

public NumberCalculateException(String msg){
super(msg);
}
}