Design a class to overload a function Joystring() as follows: 
(i) void Joystring(String s, char ch1, char ch2) with one string 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
Input value of s = “TECHNALAGY”
ch1 = ‘A’
ch2 = ‘O’

(ii) 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.
Input value of = “Cloud computing means Internet based computing”
First Index : 5
Last Index : 36

(iii) 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”
s2 = “GAMES”
(use library functions)

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					public class program7 
	public void Joystring(String s, char ch1, char ch2) 
		String output = s.replace(ch1, ch2);
		System.out.println("Output = " + output);
	public void Joystring(String s)
		int firstIndexOfSpace = s.indexOf(' ');
		int lastIndexOfSpace = s.lastIndexOf(' ');
		System.out.println("First index of space = " + firstIndexOfSpace);
		System.out.println("Last index of space = " + lastIndexOfSpace);
	public void Joystring(String s1, String s2)
		String output = s1.concat(" ").concat(s2);
		System.out.println("Output = " + output);


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