java140-1.7后新特性

import java.io.IOException;
import java.sql.SQLException;

//java异常处理
//异常
public class test82 {
//定义方法声明定义异常，在满足条件时抛出异常对象，程序转向异常处理
public double count(double n, double m, Connection conn)throws ArithmeticException,SQLException {
if (m == 0) {//如果除数等于0.则抛出异常实例
throw new ArithmeticException("对不起。除数不能等于0");
}
if(conn==null||conn.isClosed()){
throw new SQLException( "数据库连接失败" );
}
return n/m;
}
}测试类
import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Collection;

public class test83 {
public static void main(String[] args){
test82 com1=new test82();
Collection conn=null;
try {
double t = com1.count( 78, 2, (Connection) conn );
}catch (ArithmeticException| SQLException e){
System.out.println( e.getClass().getName());
e.printStackTrace();
}
}
}

运行结果