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- What is the method in java
- A Java method is a block of code that can be called repeatedly to implement a specific function. The definition of a method includes two parts: method header and method body.
- Javagetting Started 3110 2019-11-12 10:02:25
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- what is java reflection
- The Java reflection mechanism is that in the running state, for any class, it can know all the properties and methods of this class; for any object, it can call any of its methods. This function of dynamically obtaining and calling object methods is called It is the reflection mechanism of java language.
- Javagetting Started 3101 2019-11-12 09:55:29
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- Understand what encapsulation is in java
- In Java's object-oriented programming method, encapsulation (English: Encapsulation) refers to a method of partially packaging and hiding the implementation details of an abstract functional interface. Encapsulation can be thought of as a protective barrier that prevents the code and data of the class from being randomly accessed by code defined by the external class.
- Javagetting Started 4203 2019-11-12 09:54:51
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- What is constructor function in java
- The constructor in Java is a member of object-oriented. The constructor can be called a constructor. Its function name is the same as the class name. There is no need to define a return value type and no specific return value. The constructor is a function called when constructing a created object. Its function is to initialize the object. All objects created must be initialized through the constructor.
- Javagetting Started 7207 2019-11-12 09:48:39
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- What is a process in java
- A process is the basis of operating system architecture; a unit of activity described by a single sequence of execution, a current state, and a set of associated system resources. To create a child process in java, you can use the start() method of ProcessBuilder and the exec() method of Runtime.
- Javagetting Started 3504 2019-11-12 09:30:49
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- How to write java program using eclipse
- The method to use eclipse to write a java program is: 1. Open eclipse and select java project in the menu bar; 2. Fill in the package name and program name in the demo project; 3. Write your own program in the main method.
- Javagetting Started 6728 2019-11-12 09:30:23
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- what is java constructor
- The constructor is a member of object-oriented. The constructor can be called a constructor. Its function name is the same as the class name. There is no need to define a return value type and no specific return value. The constructor is a function called when constructing and creating an object. Its function is to initialize the object. All objects created must be initialized through the constructor.
- Javagetting Started 4159 2019-11-12 09:26:44
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- Solution to the problem that the java path cannot be found
- The reason why the java path cannot be found is: the path has Chinese characters. Solution: 1. Create a new java_home value and add the jdk installation directory; 2. Create a new classpath value and add;%java_home%\lib; 3. Add %java_home%\bin to the path.
- Javagetting Started 5470 2019-11-12 09:32:15
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- What does java instantiation look like?
- Java instantiation is to create an object, such as: Demo demo = new Demo(); statement, which uses the Demo class as a template to create a Demo class object in the heap space.
- Javagetting Started 4349 2019-11-12 09:36:29
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- What are the differences between java heap and stack
- Difference: Stack memory is used to store local variables and method calls, while heap memory is used to store objects in Java. Stack memory belongs to a single thread. Each thread will have a stack memory, and the variables it stores can only be visible in the thread to which it belongs. Objects in heap memory are visible to all threads, objects in heap memory can be accessed by all threads, and so on.
- Javagetting Started 6322 2019-11-11 17:09:39
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- what is java api
- API (Application Programming Interface) is a set of predefined functions that provide applications and developers with the ability to access a set of routines based on certain software or hardware without having to access the source code or understand the internals. Details of the working mechanism.
- Javagetting Started 4651 2019-11-11 16:46:43
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- what is java 8 update
- Java Update is a software in category Audio & Multimedia Freeware developed by Oracle. Java Update is a feature that keeps your Windows computer up to date with the latest Java releases.
- Javagetting Started 24717 2019-11-11 16:35:19
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- What are the differences between java 7 and java 8?
- New features of Java 8: Allow adding a non-abstract method implementation to the interface, just use the default keyword; lambda expressions; functional interfaces; method and constructor references; accessing outer scopes in lambda expressions Very similar to the way in older versions of anonymous objects, etc.
- Javagetting Started 7059 2019-11-11 16:20:58
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- How to run java in cmd
- How to run java in cmd: 1. Write a java program and save it as a .java file; 2. Open the cmd command window; 3. Enter the file location; 4. Run the command javac a.java; 5. Run the command java a.
- Javagetting Started 24787 2019-11-11 16:13:11
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- What are the differences between java == and equals
- ==: The comparison is whether the values are equal; if it acts on a variable of a basic data type, it directly compares whether the stored value is equal; if it acts on a variable of a reference type, it compares the address of the pointed object. equals: cannot act on variables of basic data types. equals inherits the Object class and compares whether they are the same object.
- Javagetting Started 4067 2019-11-11 16:05:50
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