Cannot resolve method 'valueOf' in 'String'
时间: 2023-08-07 20:05:38 浏览: 44
这个错误通常表示你在使用 `valueOf` 方法时传入的参数类型不是对应的枚举类型。请确保你传入的参数是一个枚举类型,并且与该方法所在的枚举类相对应。
例如,如果你有一个名为 `MyEnum` 的枚举类,其中包含一个名为 `VALUE_ONE` 的枚举值,你可以使用以下代码来获取该枚举值:
```
MyEnum myEnum = MyEnum.valueOf("VALUE_ONE");
```
请注意,`valueOf` 方法接受一个字符串参数,该字符串应该是该枚举类中的一个有效枚举值的名称。如果你传入的字符串不是一个有效的枚举值名称,将会抛出 `IllegalArgumentException` 异常。
相关问题
Cannot resolve method 'setText(double)'
The error message "Cannot resolve method 'setText(double)'" means that there is no method called `setText()` that accepts a double value as an argument.
The `setText()` method is used to set the text of a TextView in Android, and it accepts a String value as an argument. If you want to display the double value in a TextView, you should convert it to a String first using the `String.valueOf()` method.
For example, if you have a double variable called `myDouble` and you want to display its value in a TextView called `myTextView`, you can do it like this:
```
double myDouble = 3.14;
TextView myTextView = findViewById(R.id.myTextView);
myTextView.setText(String.valueOf(myDouble));
```
This will convert the double value to a String and set the text of the TextView to that String.
Cannot resolve method 'split()'
This error occurs when you try to use the `split()` method on a data type that does not have the method defined.
For example, you might try to split an integer or a boolean value using the `split()` method, which is not valid because these data types do not have the method defined.
To fix this error, you need to make sure that you are using the `split()` method on a string data type. You can do this by converting the data type to a string using the `toString()` method or by making sure that the variable you are using is a string data type.
Here is an example of how to split a string:
```
String str = "Hello, World!";
String[] words = str.split(",");
```
In this example, the `split()` method is used on the `str` variable, which is a string data type. The method splits the string at the comma, and the resulting array contains the two words "Hello" and " World!".