KwickClips Java · 40 sec · free
Why does this not compile?
Short answer. A static method has no object, so it cannot reference an instance variable directly.
What can an instance method use?
Both static and instance members, directly.
Remember
| static uses static directly |
| Instance methods use both |
Non-static variable cannot be referenced. Seen this error? Show is static, so no object is involved. Whose marks should it use? Java cannot tell, so it refuses. Static code uses static members directly. Instance methods can use both.
This clip is from the full lesson: Static Members: Class Variables and Class Methods — 6 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: ICSE Class 10 Computer Applications, ISC Class 11 Computer Science (868), ISC Class 12 Computer Science (868), ISC Class 12 Computer Science (868)
More KwickClips from this lesson
How many copies does a static variable have?40 sec
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