Programming Example

Design a class to overload a function Joystring( ) as follows:

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Study this program carefully to understand the logic, output, and explanation in a structured way.

Information & Algorithm

void Joystring(String s, char ch1, char ch2) with one string argument and two character arguments that replaces the character argument ch1 with the character argument ch2 in the given String s and prints the new string.
Example:
Input value of s = "TECHNALAGY"
ch1 = 'A'
ch2 = 'O'
Output: "TECHNOLOGY"
void Joystring(String s) with one string argument that prints the position of the first space and the last space of the given String s.
Example:
Input value of s = "Cloud computing means Internet based computing"
Output:
First index: 5
Last Index: 36
void Joystring(String s1, String s2) with two string arguments that combines the two strings with a space between them and prints the resultant string.
Example:
Input value of s1 = "COMMON WEALTH"
Input value of s2 = "GAMES"
Output: COMMON WEALTH GAMES

(Use library functions)

Program Code

public class RAnsariStringOverload
{
    public void joystring(String s, char ch1, char ch2) {
        String newStr = s.replace(ch1, ch2);
        System.out.println(newStr);
    }
    
    public void joystring(String s) {
        int f = s.indexOf(' ');
        int l = s.lastIndexOf(' ');
        System.out.println("First index:  " + f);
        System.out.println("Last index:  " + l);
    }
    
    public void joystring(String s1, String s2) {
        String newStr = s1.concat(" ").concat(s2);
        System.out.println(newStr);
    }
    
    public static void main(String args[]) {
        KboatStringOverload obj = new KboatStringOverload();
        obj.joystring("TECHNALAGY", 'A', 'O');
        obj.joystring("Cloud computing means Internet based computing");
        obj.joystring("COMMON WEALTH", "GAMES");
    }
}

How to learn from this program

First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.

Practice suggestion

After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.

Design a class to overload a function Joystring( ) as follows:

Information & Algorithm

Program Code

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