OOP - What is the proper definition between instance and object? [duplicate] - java

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What is the difference between object and instance?
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Is instance and object same thing in OOP or not?
A good explanation Here. But some explanation is so confusing.
I want to know best explanation. Advance thanks .

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In OOP, in general, this concept is called class composition more on this you can find it here https://en.wikipedia.org/wiki/Object_composition
Also for java and the difference between Composition and inheritance https://www.baeldung.com/java-inheritance-composition

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I am doing some Java homework and we are currently studying IO and files in java.
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Because no matter how many objects will we create with static will share same reference ?

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