KwickClips Java · 38 sec · free
How do you stop a negative balance?
Short answer. Make the field private and check the value inside the setter.
What does a getter do?
It returns the value so others can read it.
Remember
| Data private |
| Getter reads, setter checks |
Can anyone set your balance to minus fifty? Not with this. Bal is private. The getter reads it. The setter changes it only if the amount is not negative. Keep data private. Getters read, setters check.
This clip is from the full lesson: Access Specifiers, Encapsulation and Visibility — 5 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: CBSE Class 9 Information Technology (402), ICSE Class 9 Computer Applications, ICSE Class 10 Computer Applications, ICSE Class 10 Computer Applications
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