static methods in java
时间: 2023-10-17 09:06:57 浏览: 99
In Java, a static method is a method that belongs to a class rather than to an instance of that class. This means that a static method can be called directly on the class itself, without the need to create an instance of the class first.
To define a static method in Java, the keyword "static" is used before the method signature. For example:
```
public class MyClass {
public static void myStaticMethod() {
// code to be executed
}
}
```
To call a static method, you simply use the class name followed by the method name:
```
MyClass.myStaticMethod();
```
Static methods have a few key characteristics:
- They can access only static variables and other static methods.
- They cannot access instance variables or instance methods directly.
- They are shared across all instances of a class.
- They can be called without creating an instance of the class.
Some common examples of static methods in Java include utility methods (such as those found in the `java.lang.Math` class), factory methods (which create objects of a class), and methods used for initializing static variables.
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