Quote:
As there are Many language standards why java uses Unicode systems
Unicode isn't a language - it's a character set.
That means it contains "how to draw" instructions for all the letters and special characters that can be displayed: A..Z, a..z, 0..9, !"£$%^&*()-_=+[{]} ... as well as a huge number of other "shapes" to allow Persian, Chinese, Japanese, Korean, Cyrillic, ... languages to be used, and also all the bullets and emojis you could ever want.
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Older languages used a 7 (or more usually 8) bit character which could only hold 128 *(or 256) characters "shapes" where Unicode uses a 16 bit character and can hold 32K different characters, all displayable.
That's why Java uses Unicode: because it makes your job simpler when you want to use more than just A..Z|, a..z, 0..9, and a handful of special characters.
* This is a "Lie to Children" - an approximation to the real state of affairs which is close enough for use without needing huge amounts of deeper explanation. It's pretty much totally wrong, but it's good enough for beginners
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