concat() and trim() method

concat()

You can concat two String using concat() as shown below:


package stringdemo;


public class Concat {
    public static void main(String[] args) {
        String s1="ram";
        String s2="john";
        
        System.out.println(s1.concat(s2));
    }

}

The output of the above program is:

ramjohn

trim()

trim() method of String in java is used to remove whitespace.It has the general form:

String trim();

Here is a small program to demonstrate trim()method:

package stringdemo;

public class Trim {

    public static void main(String[] args) {

        String s="  Hello World";

        

        System.out.println(s.trim());

    }

}

The output of the above program is:

Hello World