How can I convert a String variable to a primitive int in Java

0 votes

I want to convert a String(having just numbers) to int. For Example: "100" to be converted to a numeric 100. So that I can perform Arithmetic operations on it.

Apr 12, 2018 in Java by Parth
• 4,640 points
2,212 views

2 answers to this question.

0 votes

You can convert a String to int by using a function:

int num= Integer.parseInt(string);

For Example:

String s="100";
int i=Integer.parseInt(s);

You can convert a String to Integer by using a function:

int num=Integer.valueOf(string);

String s="100";
int i=Integer.valueOf(s);
answered Apr 12, 2018 by sharth
• 3,370 points
0 votes

 Here are two ways illustrating this:

Integer x = Integer.valueOf(str);// orint y = Integer.parseInt(str);

There is a slight difference between these methods:

  • valueOf returns a new or cached instance of java.lang.Integer
  • parseInt returns primitive int.

The same is for all cases: Short.valueOf/parseShort, Long.valueOf/parseLong, etc.

answered Aug 20, 2019 by Sirajul
• 59,230 points

Related Questions In Java

0 votes
2 answers

How do I convert a String to an int in Java?

Use the lines of code mentioned below:- String ...READ MORE

answered Feb 9, 2022 in Java by Soham
• 9,710 points
3,076 views
0 votes
2 answers
+17 votes
25 answers

How can I convert String to JSON object in Java?

Hi @Daisy You can use Google gson  for more ...READ MORE

answered Feb 7, 2019 in Java by Suresh
• 720 points
253,250 views
0 votes
2 answers

How to convert an int array to string using tostring method in java?

Use java.util.Arrays: String res = Arrays.toString(array); System. ...READ MORE

answered Aug 16, 2019 in Java by Sirajul
• 59,230 points
2,352 views
0 votes
2 answers

Integer to String conversion in java

We can do this in 2 ways: String ...READ MORE

answered Jul 28, 2018 in Java by samarth295
• 2,220 points
1,063 views
0 votes
3 answers

String to Double conversion in java

Double temp = Double.valueOf(str); number = temp.doubleValue(); READ MORE

answered Sep 10, 2018 in Java by Sushmita
• 6,920 points
1,641 views
0 votes
4 answers

Remove extra spaces from string in java

import java.util.regex.Matcher; import java.util.regex.Pattern; String pattern="[\\s]"; String replace=""; part="name=john age=13 year=2001"; Pattern ...READ MORE

answered Sep 10, 2018 in Java by Parth
• 4,640 points
2,950 views
0 votes
1 answer

Formatting Double Value in Java

An alternative is to use String.format: double[] arr = ...READ MORE

answered May 15, 2018 in Java by Rishabh
• 3,620 points
2,465 views
0 votes
2 answers

How can I convert byte array into hex string in Java?

public static String byteArrayToHex(byte[] a) { ...READ MORE

answered Aug 29, 2019 in Java by Sirajul
• 59,230 points
2,865 views
0 votes
3 answers

How to reverse a string in java?

public static String reverse(String s) { ...READ MORE

answered Aug 17, 2018 in Java by samarth295
• 2,220 points
1,482 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP