JAVA: Your CODE will take an infix algebraic expression as an input from user. It will check that whether it is a valid expression or not. Then It will be converted into postfix expression, and at the...

 JAVA: Your CODE  will take an infix algebraic expression as an input from user. It will check
that whether it is a valid expression or not. Then It will be converted into postfix
expression, and at the end it will be evaluated and print the result of the expression.
For example:
if input is: (3+5)*(7
output: it is invalid.
If input is: (3+5)*7 , display
Postfix form: 35+7*
Answer: 56.