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Static {} (static block) is executed only once when the class is loaded. It is generally used to initialize static variables and call static methods, next we will discuss in detail the features and applications of this statement block.1. During a
A deep understanding of JAVA's static (combined with the C language) and a deep understanding of static
1 public class statictest {2 3 4 String X = "I am a non-static variable"; 5 6 7 static int butterfly = 0; 8 static String staticX = "I Am a
Calling a non-static method is the first way to call a static method to get the Java class object to call and then by calling
Minfo.env->callvoidmethod (Activityobj, Minfo.methodid); method takes the object and the method and arguments to invoke,
Static represents the meaning of "global" or "static", which modifies member variables and member methods, and can also form statically static blocks of code, but there is no concept of global variables in the Java language. member variables and
One, static variable
The member variable decorated by the static keyword is called a static variable, and before we talk about the difference between a member variable and a local variable, what is the difference between a static variable and a
7-1, Constructors-Overview
1, Features:
(1) The function name is the same as the class name.
(2) The return value type is not defined.
(3) There is no specific return value.
2, constructors
Constructors are constructs that create objects that are
2.6.3 static keywordGenerally, when creating a class, we will point out the appearance and behavior of the Class Object. Unless you use new to create an object for that class,Otherwise, you will not actually get anything. The data storage space will
static denotes "global" or "static" meaning, used to decorate member variables and member methods, or to form static-code blocks, but the concept of global variables is not available in the Java language.
The member variables and member methods
Static
represents the meaning of "global" or "static", which modifies member variables and member methods, and can also form statically static blocks of code, but there is no concept of global variables in the Java language.
Static represents the meaning of "global" or "static", which modifies member variables and member methods, and can also form statically static blocks of code, but there is no concept of global variables in the Java language.member variables and
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