How to split string by ± in java

Question

I was trying to split my string using ± (alt + 0177) sign, but it dos't detect it. I also tried indexOf() but its not work

    String myString = "20±1";
    if(myString.indexOf('±')>-1){
         System.out.println("We are in here.........");
    }

`.indexOf` takes a `char` as parameter, not a string! Moreover, finding the index of a char won't split the string on its own. — TDk, Sep 14 '17 at 12:44
You wrote `String` wrong and `indexOf` takes a char as param. Fixed those errors it works — rakwaht, Sep 14 '17 at 12:46
System.out.println(a.substring(a.lastIndexOf("±", a.length()))); — Balasubramanian, Sep 14 '17 at 12:49
Possible duplicate of [How to split a string in Java](https://stackoverflow.com/questions/3481828/how-to-split-a-string-in-java) — Abbas, Sep 14 '17 at 13:25

score 1 · Answer 1 · answered Sep 14 '17 at 12:53

1

Use function split()

String myString = "20±1";
String result[] = myString.split("±");
//result[0] = 20
//result[1] = 1

answered Sep 14 '17 at 12:53

Angel Arias González

169
1
6

score 1 · Accepted Answer · answered Sep 14 '17 at 13:02

You can use the ascii value for the '±' sign.

An easy way get the ascii value as shown in this reply here

In your case:

final int ascii = (int) '±';
final String myString = "20±1";

if(myString.indexOf(ascii)>-1){
     System.out.println("We are in here.........");
}

score 0 · Answer 3 · answered Sep 14 '17 at 12:54

    /*Your String*/
    String myString = "20±1";


    /*If you want to split String you can use String.split("your string regex here")
     * and it will create String array without specified string regex with left, right 
     * side of string or multiple strings depending on occurrence of specified string regex*/

    String[] splitted = myString.split("±");


    /*Just to validate output*/
    System.out.println(Arrays.toString(splitted));

score 0 · Answer 4 · answered Sep 15 '17 at 16:32

you can use also StringTokenizer for this problem:

import java.io.*;
import java.util.*;
class happy {
    public static void main(String args[])
    {
        String myString = "20±1";
        StringTokenizer st=new StringTokenizer(myString,"±");
        String a="";
        while(st.hasMoreTokens())
        {
            a=st.nextToken();
            System.out.println(a);
        }
    }
}

How to split string by ± in java

4 Answers4