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

java140-1.7后新特性_sql