Solve equation which is in string format [duplicate] - java

This question already has answers here:
How to evaluate a math expression given in string form?
(26 answers)
Closed 6 years ago.
I have a equation in string format like "45+5*4-6" which I have to solve in Java.
Is there any way to solve equation which is in string format?

Check Beanshell
Something like this should work -
Interpreter ip = new Interpreter();
ip.eval("res = 45+5*4-6");
System.out.print(ip.get("res"));

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Calculate a formula from a string [duplicate]

This question already has answers here:
How to evaluate a math expression given in string form?
(26 answers)
Closed 6 years ago.
I want to do calculator that do sums but just in one index like this:
args[0] = "2+2"
and the output should be 4.
I won't do your homework for you, but I'll split it in few steps:
You should get String before the "+" and after the "+":
Have a look at String.indexOf and String.substring for that. Make sure you check for -1 for indexOf.
Parse String to int:
int foo = Integer.parseInt(String s);
Now you can add two ints.
Good luck!

How do I recognize "/" in string? [duplicate]

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How do I compare strings in Java?
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Closed 7 years ago.
I've used
String[] red = linija.split("(?!^)");
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Have you tried red[0].equals("/") ?

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