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Explain late static binding in PHP (static::).
Article Introduction：Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.
2025-04-03
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598
What is the static keyword in Java?
Article Introduction：Static members belong to the class itself rather than instances, and can be directly accessed through the class name, including static variables, methods, code blocks and nested classes, used to share data or be called without objects. For example, only one copy of the static variable is shared by all instances, static methods can be called directly but only static members can be accessed. Static code blocks are executed once when the class is loaded for initialization. Static nested classes can be created independently of external class instances, and static members are only loaded once in memory. They are often used in tool methods, constant definitions and configuration settings, but abuse should be avoided to prevent code coupling.
2025-08-15
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440
what are the different types of inner classes in java
Article Introduction：Java has four internal classes: member internal classes, static nested classes, local internal classes and anonymous internal classes. The member internal classes are non-static and need to be created through external class instances, which can access all members of the external class including private members; static nested classes are static and do not rely on external class instances, and can only access static members of the external class; local internal classes are defined in methods or code blocks, and can only access final or effectively final variables within the scope; anonymous internal classes have no name, and are used to temporarily implement interfaces or inheritance classes. They are often used for function interface implementation before event processing or functional programming. Since Java8, they are mostly replaced by lambda expressions; which internal class is chosen depends on whether they need to access external instances and scope scope
2025-08-24
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594
