Question

eclipse 运行代码出现错误 Exception in thread "main" java.lang.ClassNotFo。。。

Exception in thread "main" java.lang.ClassNotFoundException: com.mysql.jbdc.Driver
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at gjxweb.sql1.main(sql1.java:6)

（驱动已经添加了）代码如下：
import java.sql.*;
public class sql1 {
public static void main(String[] args) throws Exception{
Class.forName("com.mysql.jbdc.Driver");
Connection conn=DriverManager.getConnection("jbdc:mysql://localhost:3306?mytest","root","123456");
PreparedStatement pstmt =conn.prepareStatement("SELECT * from user where username=?");
pstmt.setString (1,"test1");
ResultSet rs=pstmt.executeQuery();
if(rs.first()){
System.out.println("查到的"+rs.getString("username")+"用户的密码为"+rs.getString("password"));

}
rs.close();pstmt.close();conn.close();
}

}

Answer 1

triangle 是你自己写的类? triangle [] ta =new triangle[4]; 这句改成 int[] ta = new int[4];

追问

我这代码根本没有这句，不要套用其他问题的答案！