java class documentation

After some time in Java learning, you may often hear the word reflex, which means that Java has learned a higher level. Next, I'll take a step-by-step with you to uncover the mysteries of Java's advanced features reflection.The concept of the following class object is introduced first, and may often be used in this concept:　　　　

Java File class learning notes 2: File class objects and common operation methods, file learning notes 1. File, relative path, and absolute path 1. File(1) standard files: such as images and music files.(2) directory file: a folder.(3) virtual memory files: temporary files generated by the system during program running. 2. File Path(1) Relative Path: compared wit

The life cycle of a class isLoading、ConnectionAndInitializeStart, to the end of the class being unloaded.A Java program can use a class only if it is in its life cycle, such as calling static properties and methods of a class, or creating a real column of a classBrief introd

[JAVA] java enumeration class, java Enumeration I. Under what circumstances do I use enumeration classes? Sometimes the objects of a class are limited and fixed. In this case, it is more convenient to use enumeration classes? 2. Why not use static constants to replace enumer

Why the anonymous intrinsic class parameter must be a final type:1) from the theory of the programming language: The local inner class (i.e., the inner class defined in the method ), because it is inside the method itself (can appear at the formal parameter definition or method body), thus accessing the method of the local variables (formal parameters or local va

Java property file properties common operation tool class, properties tool classFor the java. util. Properties class, we usually only need to achieve the following three learning objectives:1. Understand the properties file, understand its meaning, and create the properties file correctly.2. the

{private String name = "Zhang San";p rivate int num1 = 1;public void outer () {System.out.println (name+ "" +num1);//syst Em.out.println (num2); The outer class cannot directly access the Inner class member Inner1 Inner1 = new Inner1 ();//The outer class can instantiate an inner class, access the Inner

1. Object-Oriented Programming:The language of object-oriented programming is not only Java, but also:Simula 67 (the first object-oriented language, supports both single-inheritance and certain meanings of polymorphic and partial dynamic binding);Smalltalk (the first language that supports dynamic typing, supports single inheritance, polymorphism, and dynamic binding);EIFFEL (supports multi-inheritance, polymorphism and dynamic binding);C + + (most of

Beginner's knowledge of JAVA (2) ---- difference between the String class and the StringBuffer class, javastringbuffer There are two types of String operations in Java: String and StringBuffer (buffer String processing ).The following is a brief description of the differences between the two.Both the String

The inner class of the member means that the bread in an outer class has a non-static class, for example:class outerclass{ // variables, function definitions ... class innerclass { // variable, function definition ... }} About the various uses of the members ' i

[Java class set] _ recognition class set and collection interface notes 3. Details Function of Class Set A class set is actually a dynamic array of objects. unlike an ordinary array of objects, the content of the class set o

0. PrefaceUnderstanding the JVM virtual machine principle is a necessary step for every Java programmer to practice. But because there are a lot of things in the JVM virtual machine to tell the relatively broad, in the current exposure to the JVM virtual machine principle of the tutorial or blog, the vast majority of the text-based description, it is difficult to give people a visual perception, after reading the feeling is still confused.Feeling the

Java record-22-Explanation of basic class objects in JavaFor details about the basic class objects of Java, you should refer to and use the JDK documentation frequently. It is best to view the documentation in English. Oracle offi

?? We all know that in Java you can use an inner class to place the definition of a class inside the definition of another class, which is an inner class, but the anonymous inner class often makes us feel that it doesn't have a sp

Java inheritanceInheritance is the child class inherits the characteristics and behavior of the parent class, so that the subclass object (instance) has the parent class's instance domain and method, or the subclass inherits the method from the parent class, so that the subclass has the same behavior as the parent clas

consistent, is also very reasonable. But we will find a very interesting phenomenon, we will find that the process does not exit, when the main main thread is finished, which means that the timer to complete the task, even if there is no waiting for the task to be performed, the timer created in the background thread will not immediately exit. Viewed the relevant Java Doc documentation, explained that the

Discover problemsAfter switching to the Mac platform, suddenly want to write a program run under the Mac, think of the Mac comes with Java, will be much easier. But in the process of encountering trouble:Always prompt for "error: The main class could not be found or could not be loaded "Engineering structureLooked for a long time, finally found the prototype, found on the internet a lot of information is n

provide byte stream reads in bytes (8 bits), so the FileReader class reads the file as a stream of characters, FileInputStream reads the file by byte stream; InputStreamReader can convert read as stream into character stream, which is the bridge between reader and stream.? Originally Java was not supporting the processing of text files, in order to compensate for this shortcoming introduced the reader and

Refer to this articleArticle: Http://docs.oracle.com/javase/tutorial/java/javaOO/nested.html Differences between Nested-class and inner-class: Nested classes are divided into two categories: static and non-static. Nested classes that are declaredStaticAre simply calledStatic Nested classes. Non-static Nested classes are calledInner classes. In the foll

Java study notes 23 --- internal class local internal class can only access final local variables, study notes 23 --- A local internal class is a class defined in the method body or code block. It has been briefly introduced in note 19. Today we will discuss why local intern