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[Java] Java methods with return value
2020/12/30
When Method is written using return in Java, data_type should be matched in 〇〇 area as below: public ...
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How to check errors when 'xxx' undeclared
2020/12/21
I often get error and error often says 'xxx' undeclared. So I just organized my though what I should ...
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[Java] How to access data using array, ArrayList, and map
2020/12/30
I'm sometimes confused how to access data when I use array, arraylist, and map at the same time. So ...
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What's library and package?
2020/12/30
I just wanted to organize my thought about relation between library and package so that I can be cle ...
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What's advantages of arguments?
2020/12/30
When I learned arguments, I somewhat understand about concept but didn't understand "Why should I us ...
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What's advantages of declaring variables?
2020/12/15
When I learn Java, I was wondering why variables should be declared. But when I search about this, I ...
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What is Data types?
2020/12/30
Purpose? I'm currently learning about JAVA and I'm getting confused about data types, so I organize ...