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- Is parameter passing in Java passed by value or by reference?
- This article is from the Java introductory tutorial. It introduces the relevant knowledge of parameter passing in Java. It has certain reference value and I hope it can help everyone. All transfers in Java are by value, and all transfers of instance objects in Java are by reference.
- Javagetting Started 2506 2020-07-30 17:12:19
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- What is the function of static keyword in java
- Static variables are also called class variables. Static variables belong to a class. All instances of a class share static variables and can access it directly through the class name. Static variables only have one copy in memory.
- Javagetting Started 2473 2020-07-30 17:04:22
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- Analysis of the relationship between stack memory, heap memory and method area
- All objects stored in the heap area are objects, and each object contains information about a corresponding class. Each thread contains a stack area, and only objects of basic data types and references to custom objects are stored in the stack.
- Javagetting Started 2712 2020-07-30 16:37:28
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- How to use the Calendar class to determine leap years in normal years
- This article comes from the Java introductory tutorial. It shares with you the method of judging leap years in ordinary years. It has certain reference value and I hope it can help everyone. Ideas: 1. Create a Calendar object; 2. Set the year of the object to the year entered on the keyboard; 3. Set the month to February 28; 4. Add 1 to the number of days to determine whether the number of days is 29.
- Javagetting Started 2874 2020-07-29 17:13:39
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- Introduction to the life cycle of java classes
- The life cycle of a Java class: class loading, connection, initialization, use, and unloading.
- Javagetting Started 2558 2020-07-29 16:59:13
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- What should you pay attention to when using inheritance in Java
- When using inheritance in Java, you need to pay attention to: 1. There is only single inheritance in Java, and interfaces have multiple inheritance; 2. When a subclass inherits the parent class, it can get all the attributes and methods of the parent class, but it may not be able to directly use the methods.
- Javagetting Started 2240 2020-07-29 16:46:44
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- What are the keywords used to define classes in java?
- The keyword for defining a class in java is: "class". To define a class in Java, you need to use the "class" keyword, a custom class name, and a pair of braces to represent the program body.
- Javagetting Started 27151 2020-07-29 14:50:30
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- Detailed introduction to the File class in Java
- This article is from the Java introductory tutorial. It explains the relevant knowledge of the File class in Java with examples. It has certain reference value and I hope it can help everyone. Construction method: [File f = new File("File path")].
- Javagetting Started 2992 2020-07-23 17:24:54
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- Examples of the Calendar class in java
- The Calendar class is an abstract class that encapsulates all calendar field values and obtains values based on the different calendar fields passed in through a unified method. Get a calendar object: [Calendar c = Calendar.getInstance();].
- Javagetting Started 2531 2020-07-23 17:10:03
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- How to calculate the number of days by calculating the time difference between two dates in Java
- This article shares with you the method of calculating the number of days by calculating the time difference between two dates. It has certain reference value and I hope it can help everyone.
- Javagetting Started 5555 2020-07-23 16:58:40
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- What are the similarities and differences between constructor method and set method in Java?
- Java introductory tutorial: This article introduces the similarities and differences between the constructor method and the set method in Java. It has certain reference value and I hope it can help everyone. The constructor method is automatically called by the jvm when creating an object, and the set method is manually called after the object is created.
- Javagetting Started 4443 2020-07-21 17:14:05
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- What are the common Java annotations?
- Common Java annotations include: @author, indicating the author who developed the module; @version, indicating the version of the module; @see, referring to the reference direction, that is, related topics; @param, describing a certain parameter in the method. , cannot be written without parameters.
- Javagetting Started 2724 2020-07-21 17:03:41
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- In Java language, what is the difference between throw and throws
- In the Java language, the difference between throw and throws is: 1. throws is used to declare all exceptions that may be generated by a method without any processing; throw is used to throw a specific exception type.
- Javagetting Started 5464 2020-07-21 16:52:40
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- What is the function of Scanner class in Java
- Java introductory tutorial: This article introduces the function and usage of the Scanner class in Java. It has certain reference value and I hope it can help everyone. Scanner is used to obtain the string entered by the user on the console.
- Javagetting Started 4980 2020-07-20 17:10:21
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- What is the difference between next and nextLine methods in Java?
- The difference between next and nextLine in Java is that the next() method will recognize spaces as the end of input; the nextLine() method will recognize the newline character as the end of input.
- Javagetting Started 2710 2020-07-20 17:00:03
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