Call to 'toString()' is redundant
时间: 2024-01-17 10:05:47 浏览: 182
Thank you for your question! The warning "Call to 'toString()' is redundant" typically occurs when there is a redundant call to the `toString()` method.
In many programming languages, objects have a `toString()` method that converts the object to a string representation. However, when you concatenate or use an object directly in a string context, the `toString()` method is automatically called, so explicitly calling `toString()` is unnecessary.
Here's an example to illustrate this:
```java
String name = "John";
String message = "Hello, " + name.toString() + "!"; // Redundant call
System.out.println(message);
```
In the above code, the call to `toString()` on the `name` object is redundant because the concatenation operator (`+`) automatically calls `toString()` internally. The code can be simplified as follows:
```java
String name = "John";
String message = "Hello, " + name + "!"; // No need for toString()
System.out.println(message);
```
By removing the redundant call, the code becomes cleaner and easier to read.