PasswordVerifier示例将无法编译[重复]

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What does a “Cannot find symbol” compilation error mean? 10 answers

“无法找到符号”编译错误是什么意思? 10个答案

I'm getting a Java: 10: error for line 7, when I compile the code listed below. This is sample given to us for this weeks assignment to tailor to meet requirements of the project and I know this same code has popped up repeated on Stack.

当我编译下面列出的代码时,我得到了Java:10:第7行的错误。这是给我们这个星期分配的样本,以便量身定制以满足项目的要求,我知道在Stack上重复出现了相同的代码。

import javax.swing.JOptionPane;

public class ProjectTwo
{
   public static void main(String[] args)
   {
      String input;
      input = JOptionPane.showInputDialog("Enter a password.");
      if (!PasswordVerifier.isValid(input))
         JOptionPane.showMessageDialog(null, "Invalid password.");
      else
         JOptionPane.showMessageDialog(null, "Valid password.");
      System.exit(0);
   }
}

Based off the error, I believe I haven't imported the correct utility to use the PasswordVerifier function. I've been digging through:

根据错误,我相信我没有导入正确的实用程序来使用PasswordVerifier函数。我一直在挖掘:

docs.oracle.com

to find possibly what element of javax.swing is applicable to import, with no luck. Any help would be greatly appreciated.

找到可能javax.swing的哪个元素适用于导入,没有运气。任何帮助将不胜感激。

1 个解决方案

#1

There should be an import statement for PasswordVerifier? For example.

PasswordVerifier应该有一个import语句?例如。

import com.package.PasswordVerifier

Example of my output when I ran your code

我运行代码时输出的示例

C:\Users\Aaron\Documents\ProjectTwo.java:9: error: cannot find symbol
  if (!PasswordVerifier.isValid(input))
       ^
symbol:   variable PasswordVerifier
location: class ProjectTwo
1 error

#1