Question

How to concat String in Java

Answer 1

package javaapplication1;

public class JavaApplication1 {
    
    public static void main(String[] args) {
  
        String s1 = "Java ";
        String s2 = "Programming";

        String s3 = s1 + s2;
        System.out.println(s3);
    }
}
   
/*
   
run:
   
Java Programming
   
*/

 

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Answer 2

package javaapplication1;

public class JavaApplication1 {
    
    public static void main(String[] args) {
  
        String s1 = "Java ";
        String s2 = "Programming";

        String s3 = s1.concat(s2);
        System.out.println(s3);
    }
}
   
/*
   
run:
   
Java Programming
   
*/

 

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Answer 3

package javaapplication1;

public class JavaApplication1 {
    
    public static void main(String[] args) {
  
        String s1 = "Java ";
        String s2 = "Programming";

        String s3 = new StringBuffer().append(s1).append(s2).toString();        
        System.out.println(s3);
    }
}
   
/*
   
run:
   
Java Programming
   
*/

 

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