Can you explain what this program does?

public class X{ public static void main(String[] args) { Stack ops = new Stack<>(); Stack exp = new Stack<>(); StdOut.println("Enter expression with spaces: "); while (!StdIn.isEmpty()) { String inp = StdIn.readString(); if (inp.equals("+") || inp.equals("-") || inp.equals("*") || inp.equals("/")) ops.push(inp);

else if (inp.equals(")")) { String op = ops.pop(); String opernd1 = exp.pop(); String opernd2 = exp.pop();

String newExp = "(" + opernd2 + " " + op + " " + opernd1 + ")"; exp.push(newExp); } else exp.push(inp); } StdOut.println("The equivalent infix statement is: "); while (!exp.isEmpty()) StdOut.println(exp.pop() + " "); } }