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javastring-parsing

How to convert a string that contains an asterisk to an integer?

I have a string

String numAsString = "8 * 9";

And I want to convert this into an integer, so when I print the integer

int numAsInt = (the code I am asking for);
System.out.println(numAsInt);

The output would be 

72

I have tried parseInt and valueOf, but both give an exception cause of the asterisk. If you don't know, the asterisk means multiplication.
Is there a way to do this?

Solution

  • You can use something like this and it is easy: 

    String[] values = numAsString.split("\\*");
numAsInt = Integer.valueOf(values[0].trim()) * Integer.valueOf(values[1].trim());

    but If you have a calculation or something with parenthesis, plus, minus and etc, you can use this: Running JavaScript code in java
    I think this help you.