can someone help me with this problem, i have to use Java.

I. Write a program to implement the algorit postfix expressions that allow integers with more than one digit, and process expressions the integer operators +,-, *, /, %, $ (exponentiation), and the unary operator ~ Run your program with various input postfix expressions. For example; that contair a. 921+/4* b. 12 +3-21+3 S- c. 1 23+*321-+* d. 18 6/20 25-+ e. 7- 53+ f. 753-~