mysz = "name=john age=13 year=2001";

mysz2 = "name=johnage=13year=2001"

st = st.replaceAll("\s+","")

replaceAll("\s","")

String mysz2 = mysz.replaceAll("\s","");

import java.util.Enumeration;
import java.util.Hashtable;

class SplitIt {
  public static void main(String args[])  {

    String person = "name=john age=13 year=2001";

    for (String p : person.split("\s")) {
      String[] keyValue = p.split("=");
      System.out.println(keyValue[0] + " = " + keyValue[1]);
    }
  }
}

st.replaceAll("[\s|\u00A0]+", "");

String withoutWhitespace = StringUtils.deleteWhitespace(whitespaces);

s.replaceAll("\s+", "");

s.replaceAll("\s", "");

String newMysz = mysz.replace(" ","");

public static void main(String[] args) {
    String s = "name=john age=13 year=2001";
    String t = s.replaceAll(" ", "");
    System.out.println("s: " + s + ", t: " + t);
}

Output:
s: name=john age=13 year=2001, t: name=johnage=13year=2001

String a="string with                multi spaces ";
//or this
String b= a.replaceAll("\s+"," ");
String c= a.replace("    "," ").replace("   "," ").replace("  "," ").replace("   "," ").replace("  "," ");

String pattern="[\s]";
String replace="";
part="name=john age=13 year=2001";
Pattern p=Pattern.compile(pattern);
Matcher m=p.matcher(part);
part=m.replaceAll(replace);
System.out.println(part);

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RemovingSpace {

    /**
     * @param args
     * Removing Space Using Matcher
     */
    public static void main(String[] args) {
        String str= "jld fdkjg jfdg ";
        String pattern="[\s]";
        String replace="";

        Pattern p= Pattern.compile(pattern);
        Matcher m=p.matcher(str);

        str=m.replaceAll(replace);
        System.out.println(str);
    }
}

import java.util.*;
public class RemoveSpace {
    public static void main(String[] args) {
        String mysz = "name=john age=13 year=2001";
        Scanner scan = new Scanner(mysz);

        String result = "";
        while(scan.hasNext()) {
            result += scan.next();
        }
        System.out.println(result);
    }
}

mysz = mysz.replace(" ","");

String mysz = "name=john age=13 year=2001";
String[] test = mysz.split(" ");
mysz = String.join("", mysz);

org.apache.commons.lang3.StringUtils.replace("abc def ", " ", "")

abcdef

str.replaceAll("\s","");

public class RemoveSpacesFromString {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        String newString;
        String str = "prashant is good" ;
        int i;
        char[] strArray = str.toCharArray();
        StringBuffer sb =  new StringBuffer();

        for(i = 0; i<strArray.length; i++)
        {
            if(strArray[i]!= ' ' && strArray[i]!= 't')
            {
                sb.append(strArray[i]);
            }
        }
        System.out.println(sb);

        /*newString = str.replaceAll(" " , "");
        System.out.println(newString);*/
    }
}

String str="name=john age=13 year=2001";
    String s[]=str.split(" ");
    StringBuilder v=new StringBuilder();
    for (String string : s) {

        v.append(string);
    }
    str=v.toString();