first image shows the table in mysql.
second image shows design of our search criteria in netabeans
the third image is the of the coding of jbutton8
fourth is of the error we got.
so for just checking i tried to code for the the radio buttons(ofcoarse in a button group). but after doing several changes in the coding i got this error.
所以请帮帮忙
< a href=" https://i.sstatic.net/ QiXyU.png" rel=“ no follow” >link 图像 1
< a href=" https://i.sstatic.net/k6vQy.png" rel=“ no follow” 图像 2 的链接
初始化前, 您正在“ 语句” 对象上执行查询。 所以只需尝试将这两个语句互换 :
try{
stmt=con.createStatement();
rs=stmt.executeQuery(sqr);}
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