package com.direct.work; import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintStream; public class ExceptionDemo { public static void main(String[] args) {
int num = 10;
int num2 = 0;
int temp;
try {
temp = num/num2;//运算不正常异常
} catch (ArithmeticException e) {
PrintStream ps = null;
try {
ps = new PrintStream("e:\\errorInfo.txt");//流创建此文件
} catch (FileNotFoundException e1) {
e1.printStackTrace();
}
//e.printStackTrace(ps);//打印异常到文件中
//e.printStackTrace();//打印到控制台
try {
ps.write(e.toString().getBytes());//异常信息转换为字节数组，写入文件中
} catch (IOException e1) {
e1.printStackTrace();
} }
//自定义异常测试
MException me = new MException();
try {
me.division(10, 0);
} catch (MyException e) {
e.printStackTrace();
} }
}
class MyException extends Exception{
public MyException(String message){
super(message);//打印信息，父类的方法
}
}
class MException{
public void division(int num1,int num2)throws MyException{
if (num2<0) {
throw new MyException("除数不能为负数");
}
if(num2 ==0){
throw new MyException("除数不能为0");
}
}
}