Styjun

Why didn't Doc believe Marty was from the future?

What is Soda Fountain Etiquette?

To what extent should we fear giving offense?

Should I ask for a raise one month before the end of an internship?

Is the internet in Madagascar faster than in UK?

Find feasible point in polynomial time in linear programming

Why did Lucius make a deal out of Buckbeak hurting Draco but not about Draco being turned into a ferret?

Spicing up a moment of peace

Should I use the words "pyromancy" and "necromancy" even if they don't mean what people think they do?

accurate measurement from inaccurate tools

Did ancient peoples ever hide their treasure behind puzzles?

Can a network vulnerability be exploited locally?

Does the Tribal card type have inherent mechanical implications?

Why does と思います point to "you"?

How to say "I only speak one language which is English" in French?

Did the Apollo Guidance Computer really use 60% of the world's ICs in 1963?

Could the UK amend the European Withdrawal Act and revoke the Article 50 invocation?

Why does the weaker C–H bond have a higher wavenumber than the C=O bond?

Was the six engine Boeing-747 ever thought about?

Would it be better to write a trilogy over a much longer series?

Are there any to-scale diagrams of the TRAPPIST-1 system?

How does attacking during a conversation affect initiative?

Is the Amazon rainforest the "world's lungs"?

Journal published a paper without my permission when I had serious objection about the content

How to can make operator numbers in string as int in kotlin

How can I permanently enable line numbers in IntelliJ?How do I iterate over the words of a string?How do I read / convert an InputStream into a String in Java?How would you count occurrences of a string (actually a char) within a string?Convert bytes to a string?How do I make the first letter of a string uppercase in JavaScript?How to replace all occurrences of a string?How to check whether a string contains a substring in JavaScript?How do I convert a String to an int in Java?Easiest way to convert int to string in C++

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

0

1

I want to create operator in string and show the value as int.

// ex:

val str= "1+2*3" , print out -> "1+2*3"

// i want:

print out -> 7

however i tried to create kotlin code like:

val str= "$1+2*3" or val str= "1+2*3".toInt

but all this don't work.

any help???

java string intellij-idea kotlin int

share|improve this question

edited Apr 5 at 11:04

Martijn Pieters♦

756k163163 gold badges27512751 silver badges24682468 bronze badges

asked Mar 27 at 21:18

Youn TivoliYoun Tivoli

1211 silver badge1010 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You're going to need some kind of a parser here. Btw, it's 7, not 9.
  
  – Pavel Smirnov
  Mar 27 at 21:21
  

  
  
  
  

add a comment | 

0

1

I want to create operator in string and show the value as int.

// ex:

val str= "1+2*3" , print out -> "1+2*3"

// i want:

print out -> 7

however i tried to create kotlin code like:

val str= "$1+2*3" or val str= "1+2*3".toInt

but all this don't work.

any help???

java string intellij-idea kotlin int

share|improve this question

edited Apr 5 at 11:04

Martijn Pieters♦

756k163163 gold badges27512751 silver badges24682468 bronze badges

asked Mar 27 at 21:18

Youn TivoliYoun Tivoli

1211 silver badge1010 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You're going to need some kind of a parser here. Btw, it's 7, not 9.
  
  – Pavel Smirnov
  Mar 27 at 21:21
  

  
  
  
  

add a comment | 

I want to create operator in string and show the value as int.

// ex:

val str= "1+2*3" , print out -> "1+2*3"

// i want:

print out -> 7

however i tried to create kotlin code like:

val str= "$1+2*3" or val str= "1+2*3".toInt

but all this don't work.

any help???

java string intellij-idea kotlin int

share|improve this question

edited Apr 5 at 11:04

Martijn Pieters♦

756k163163 gold badges27512751 silver badges24682468 bronze badges

asked Mar 27 at 21:18

Youn TivoliYoun Tivoli

1211 silver badge1010 bronze badges

share|improve this question

edited Apr 5 at 11:04

Martijn Pieters♦

756k163163 gold badges27512751 silver badges24682468 bronze badges

asked Mar 27 at 21:18

Youn TivoliYoun Tivoli

1211 silver badge1010 bronze badges

share|improve this question

edited Apr 5 at 11:04

Martijn Pieters♦

756k163163 gold badges27512751 silver badges24682468 bronze badges

asked Mar 27 at 21:18

Youn TivoliYoun Tivoli

1211 silver badge1010 bronze badges

edited Apr 5 at 11:04

Martijn Pieters♦

756k163163 gold badges27512751 silver badges24682468 bronze badges

edited Apr 5 at 11:04

Martijn Pieters♦

756k163163 gold badges27512751 silver badges24682468 bronze badges

asked Mar 27 at 21:18

Youn TivoliYoun Tivoli

1211 silver badge1010 bronze badges

asked Mar 27 at 21:18

Youn TivoliYoun Tivoli

1211 silver badge1010 bronze badges

1 Answer
1

active

oldest

votes

1

You need to have some kind of parsers to achieve that.

Few examples

http://mathparser.org/

The advantage with the above is that you can perform any kind of calculation like below.

Expression e = new Expression("( 2 + 3/4 + sin(pi) )/2");
double v = e.calculate()

Or by using the Java inbuilt Scriptengine.

ScriptEngineManager mgr = new ScriptEngineManager();
ScriptEngine engine = mgr.getEngineByName("JavaScript");
String foo = "1+2*3";
System.out.println(engine.eval(foo)); //prints 7

share|improve this answer

answered Mar 27 at 21:50

JeyaprakashJeyaprakash

70222 gold badges66 silver badges2424 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you so much sir ,it's work for me.
  
  – Youn Tivoli
  Mar 28 at 7:17
  
  

  
  
  
  

add a comment | 

Your Answer

StackExchange.ifUsing("editor", function ()
StackExchange.using("externalEditor", function ()
StackExchange.using("snippets", function ()
StackExchange.snippets.init();
);
);
, "code-snippets");

StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "1"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);



);

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f55386611%2fhow-to-can-make-operator-numbers-in-string-as-int-in-kotlin%23new-answer', 'question_page');

);

Post as a guest

Name

Email

Required, but never shown

1

You need to have some kind of parsers to achieve that.

Few examples

http://mathparser.org/

The advantage with the above is that you can perform any kind of calculation like below.

Expression e = new Expression("( 2 + 3/4 + sin(pi) )/2");
double v = e.calculate()

Or by using the Java inbuilt Scriptengine.

ScriptEngineManager mgr = new ScriptEngineManager();
ScriptEngine engine = mgr.getEngineByName("JavaScript");
String foo = "1+2*3";
System.out.println(engine.eval(foo)); //prints 7

share|improve this answer

answered Mar 27 at 21:50

JeyaprakashJeyaprakash

70222 gold badges66 silver badges2424 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you so much sir ,it's work for me.
  
  – Youn Tivoli
  Mar 28 at 7:17
  
  

  
  
  
  

add a comment | 

1

You need to have some kind of parsers to achieve that.

Few examples

http://mathparser.org/

The advantage with the above is that you can perform any kind of calculation like below.

Expression e = new Expression("( 2 + 3/4 + sin(pi) )/2");
double v = e.calculate()

Or by using the Java inbuilt Scriptengine.

ScriptEngineManager mgr = new ScriptEngineManager();
ScriptEngine engine = mgr.getEngineByName("JavaScript");
String foo = "1+2*3";
System.out.println(engine.eval(foo)); //prints 7

share|improve this answer

answered Mar 27 at 21:50

JeyaprakashJeyaprakash

70222 gold badges66 silver badges2424 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you so much sir ,it's work for me.
  
  – Youn Tivoli
  Mar 28 at 7:17
  
  

  
  
  
  

add a comment | 

You need to have some kind of parsers to achieve that.

Few examples

http://mathparser.org/

The advantage with the above is that you can perform any kind of calculation like below.

Expression e = new Expression("( 2 + 3/4 + sin(pi) )/2");
double v = e.calculate()

Or by using the Java inbuilt Scriptengine.

ScriptEngineManager mgr = new ScriptEngineManager();
ScriptEngine engine = mgr.getEngineByName("JavaScript");
String foo = "1+2*3";
System.out.println(engine.eval(foo)); //prints 7

share|improve this answer

answered Mar 27 at 21:50

JeyaprakashJeyaprakash

70222 gold badges66 silver badges2424 bronze badges

Expression e = new Expression("( 2 + 3/4 + sin(pi) )/2");
double v = e.calculate()

ScriptEngineManager mgr = new ScriptEngineManager();
ScriptEngine engine = mgr.getEngineByName("JavaScript");
String foo = "1+2*3";
System.out.println(engine.eval(foo)); //prints 7

share|improve this answer

answered Mar 27 at 21:50

JeyaprakashJeyaprakash

70222 gold badges66 silver badges2424 bronze badges

answered Mar 27 at 21:50

JeyaprakashJeyaprakash

70222 gold badges66 silver badges2424 bronze badges

answered Mar 27 at 21:50

JeyaprakashJeyaprakash

70222 gold badges66 silver badges2424 bronze badges