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| 5. 12. 2. 定义静态成员 |
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- You can use the keyword static in front of a field or method declaration.
- The static keyword may come before or after the access modifier.
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These two are correct: |
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public static int a;
static public int b;
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To define a static method in the MathUtil class: |
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public class MathUtil {
public static int add(int a, int b) {
return a + b;
}
}
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- From inside a static method, you cannot call instance methods or instance fields because they only exist after you create an object.
- You can access other static methods or fields from a static method.
- You can only declare a static variable in a class level.
- You cannot declare local static variables even if the method is static.
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