IN JAVA

Implement a simple stack-based post-fix calculator. Your program should accept integer operands and the +, 5, and * operators. Expressions should be entered one item per line with = on the final line to trigger the calculation and output of the result. Your program should detect invalid expressions (e.g., too few operands, too many operands). Implement a simple stack-based post-fix calculator. Your program should accept integer operands and the +, 5, and * operators. Expressions should be entered one item per line with = on the final line to trigger the calculation and output of the result. Your program should detect invalid expressions (e.g., too few operands, too many operands)