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- What is reflection mechanism in java
- The Java reflection mechanism is in the running state. For any class, all properties and methods of this class can be obtained, and for any object, any of its properties and methods can be called.
- JavaBase 5690 2019-11-11 10:37:26
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- what is java interface
- An interface is an abstract type in the JAVA programming language, which is a collection of abstract methods. An interface is usually declared with interface. A class inherits the abstract methods of the interface by inheriting the interface.
- JavaBase 15702 2019-11-11 10:26:09
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- How to decompile java class files
- The method to decompile Java class files is: 1. Download jdgui suitable for your own environment; 2. View the class file; 3. Run the decompressed jdgui program; 4. Select the class file that needs to be decompiled; 5. Decompile.
- JavaBase 5161 2019-11-11 10:19:30
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- What is reflection in java?
- Java reflection means that in the running state of a Java program, for any class, all properties and methods of this class can be obtained; for a given object, any of its properties and methods can be called. This method of dynamically obtaining the contents of a class and dynamically calling objects is called reflection mechanism.
- JavaBase 5774 2019-11-11 10:04:08
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- what is encapsulated java
- Java encapsulation is an object-oriented design method. It is a method of packaging and hiding the implementation details of abstract functional interfaces; encapsulation has the advantages of reducing coupling and accurately controlling member variables.
- JavaBase 4125 2019-11-11 09:47:28
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- What is factory pattern java
- Factory pattern is one of the most commonly used design patterns in Java. This type of design pattern is a creational pattern, which provides an optimal way to create objects. You only need to call the factory method to create an object, which has the advantages of easy extension and encapsulation.
- JavaBase 3758 2019-11-11 09:34:57
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- Solve the main class cannot be found or cannot be loaded error in Java
- The reason for the error that the main class cannot be found or cannot be loaded in Java is: by default, the java instruction searches for the address of the class file in the directory specified in the CLASSPATH environment variable. Solution: Only use the java package name + class name to execute.
- JavaBase 9991 2019-11-11 09:20:42
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- what is collection java
- The Java collection class is stored in the java.util package and is a container used to store objects. Collections can only store objects, and they are references to objects rather than objects themselves; collections can store different types and an unlimited number of data types.
- JavaBase 3424 2019-11-11 09:17:01
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- The difference between interface and abstract class in java
- The difference between interfaces and abstract classes in Java: Abstract classes can only inherit once, but can implement multiple interfaces; interfaces and abstract classes must implement all methods in them. If there are unimplemented abstract methods in the abstract class, then the subclass also needs to Defined as an abstract class. Abstract classes can have non-abstract methods.
- JavaBase 3312 2019-11-11 09:12:33
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- The difference between java heap and stack
- The difference between heap and stack in Java is: 1. Stack memory stores local variables, and heap memory stores entities; 2. Stack memory is updated faster than heap memory; 3. The variables stored in stack memory end their life cycle. Released, the entities stored in the heap memory will be recycled by the garbage collection mechanism from time to time.
- JavaBase 5243 2019-11-09 17:58:31
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- The difference between java abstract class and interface
- The differences between abstract classes and interfaces in Java are: 1. Abstract classes can contain ordinary methods, while interfaces can only contain public and abstract methods; 2. Member variables in abstract classes have no access restrictions, while variables in interfaces can only Modified by public, static, and final.
- JavaBase 3168 2019-11-09 17:45:37
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- The difference between java nio and io
- The difference between nio and io in Java is: 1. io is stream-oriented, and nio is buffer-oriented; 2. The various streams of io are blocking, and nio is non-blocking mode; 3. nio has a selector mechanism, while io None.
- JavaBase 2633 2019-11-09 16:57:59
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- The difference between java = and ==
- The difference between the symbol = and the symbol == in the Java language is: in the Java language, the symbol = represents an assignment operation, while the symbol == is used to determine whether the values on both sides of the symbol are equal.
- JavaBase 4726 2019-11-09 16:25:30
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- The difference between java threads and processes
- The difference between java threads and processes: a thread only belongs to one process, but a process can have multiple threads, but at least one thread; threads are the basic unit of processor scheduling, but processes are not.
- JavaBase 3111 2019-11-09 14:02:10
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- what is java abstract class
- Java abstract class uses the abstract keyword to modify a class. This class is called an abstract class. An abstract class is a collection of public attributes of all its subclasses and a class that contains one or more abstract methods.
- JavaBase 7190 2019-11-09 13:22:05
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