Swapping two String.
Write a program to input two strings S1 and S2. Swap strings S1 and S2. Print the strings before and after strings before and after interchange.
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Arranging String in alphabetical order.
Write a program to input a string. Convert into uppercase. Print the string also print the same string after arranging each letter in alphabetical order. E.g. INPUT: COBOL OUTPUT: BCLOO
Reversing a String
Write a program to input a string(str). Reverse the string and store it in another string(rev). Print both the strings and also a message whether the strings are same or not.
Program to count frequency of "yes" or "YES" in string.
Write a program to input a sentence. Count and print the occurrence/frequency of a word "yes" or "YES" from the String. SOURCE CODE import java.io.*; import java.util.*; public class YES_yes { public static void main(String args[]) { Scanner sc=new Scanner(System.in); System.out.print("Enter a String :"); String str=sc.nextLine(); int k=0; str=str+" "; String s=""; for(int i=0;i<str.length();i++) { char ch=str.charAt(i); if(ch!=' ') { s=s+ch; } else { if(s.compareTo("yes")==0 || s.compareTo("YES")==0) { k++; } s=""; } } System.out.println("\n\n"); System.out.println(&