1. The properties of the class
♥ syntax:
Modifier Data type attribute name = initial value;
Note 1: Modifiers
√ commonly used modifiers have rights: private, default, protected, public
√ other modifiers: static, final
Note 2: Data Type
√ any basic data type (e.g., int boolean, char), or any ren reference data types.
Note 3: attribute name
√ belong identifier, in line with naming variables can be named
Examples: public class Person {
private int age;
public String name = "Lisi";
}
2. Classification of variables: local variables and member variables
• In vitro methods, variables declared within the class known as member variables.
• variable called local variables declared inside the method body.
• Note: similarities and differences in terms of initial values:
The same: have a lifecycle
Different: In addition to the local variable parameter, showed initialization.