Convert String to operator(+*/-) in java

Question

I am using Stack class to calculate simple arithmetic expressions involving integers, such as 1+2*3.your program would execute operations in the order given,without regardin

Answer 1

probably the best way to do it will be equals, but it's best to ignore whitespaces:

i'm not quite sure how you split your string, but for example, if you have a char op and two integer a and b:

String str = op.replace(" ", "");

if(str.equals("*")){
   retVal = a*b;
} else if(str.equals("+")){
   retVal = a+b;
}//etc