Question

How to remove newlines from a string Java

Answer 1

public class Program {
 
    public static String RemoveNewLines(String s) {
        return s.replaceAll("[\\r\\n]", "");
    }
 
    public static void main(String[] args) {
        String s = "c# \n  c c++  \n java python\ngo\n";
         
        s = RemoveNewLines(s);
         
        System.out.println(s);
    }
}
 
 
 
/*
run:
 
c#   c c++   java pythongo
 
*/

 

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Answer 2

public class Program {
 
    public static String RemoveNewLines(String s) {
        return s.replaceAll("\\s+", " ").trim();
    }
 
    public static void main(String[] args) {
        String s = "c# \n  c c++  \n java python\ngo\n";
         
        s = RemoveNewLines(s);
         
        System.out.println(s); // result without extra spaces
    }
}
 
 
 
/*
run:
 
c# c c++ java python go
 
*/

 

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Answer 3

public class Program {

    public static String RemoveNewLines(String s) {
        StringBuilder sb = new StringBuilder();
        
        for (char ch : s.toCharArray()) {
            if (ch != '\n' && ch != '\r') {
                sb.append(ch);
            }
        }
        
        return sb.toString();
    }


    public static void main(String[] args) {
        String s = "c# \n  c c++  \n java python\n";
        
        s = RemoveNewLines(s);
        
        System.out.println(s);
    }
}



/*
run:

c#   c c++   java python

*/

 

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