Answers for "java vs javascript"

js || vs ??

The OR operator || uses the right value if left is falsy,
  while the nullish coalescing operator ?? uses the right
  value if left is null or undefined.

javascript vs java

/*
JavaScript: Easier to learn and run, runs in browser,
not strictly object-orientated, mainly client-side.

Java: More secure, strict OOP, steeper learning curve, 
used literally everywhere, needs to be compiled.
*/

java vs javascript

/*
JavaScript can be used to do neat things like creating 
animation in HTML. ... JavaScript code is run on a 
browser only, while Java creates applications that run 
in a virtual machine or browser. Java is an OOP 
(object-oriented programming) language, and JavaScript is
specifically an OOP scripting language.
*/

!= vs !== javascript

(0 ==  '0') // true
(0 === '0') // false

('' ==  0 ) // true, the string will implicitly be converted to an integer
('' === 0 ) // false, no implicit cast is being made

difference between java and javascript

java is virtualised and compiled while javascript isn't.
javascript and java aren't that similar apart from beign 
both OOP.

java vs javascript

/*
Java script is also better than java when it comes to front-end web development 
server side performmance because node.js runs much faster than both java and 
python
*/