Cannot resolve method 'join' in 'StringUtils'
时间: 2023-10-22 21:27:45 浏览: 110
这个错误通常表示您正在调用 `StringUtils.join()` 方法时,方法的参数不正确。`StringUtils.join()` 方法需要两个参数:一个是要连接的对象数组,另一个是连接它们的分隔符字符串。请确保您提供了正确的参数,并检查您是否在使用正确的`StringUtils`类(有时可能有多个版本的类)。
此外,如果您正在使用较旧版本的 `StringUtils` 类,可能需要更新到最新版本,以便在其中使用 `join()` 方法。
相关问题
cannot resolve method error in logger
The "cannot resolve method" error in a logger indicates that the method being called does not exist in the logger's class or in any of its superclasses. This error can occur if you are using an outdated version of the logger or if you have misspelled the method name.
To resolve this error, make sure that you are using the correct version of the logger and that you have spelled the method name correctly. You can also check the logger's documentation or source code to ensure that the method you are trying to call actually exists.
Cannot resolve method 'isBlank' in 'StringUtils'
The method `isBlank()` was introduced in Java 11 and is not available in earlier versions. If you are using an earlier version of Java, you will not be able to use this method directly.
One way to check if a string is blank in earlier versions of Java is to use the `trim()` method to remove leading and trailing whitespace and then check if the resulting string is empty:
```
String str = " ";
if(str.trim().isEmpty()) {
// String is blank
}
```
Alternatively, you can create your own utility method to check if a string is blank:
```
public static boolean isBlank(String str) {
return str == null || str.trim().isEmpty();
}
```
Then you can use this method to check if a string is blank:
```
String str = " ";
if(StringUtils.isBlank(str)) {
// String is blank
}
```
Note that the `StringUtils` class you are referring to is likely from the Apache Commons Lang library, which provides additional utility methods for working with strings. If you are using this library, you can use the `StringUtils.isBlank()` method directly.