import java.io.*;
import java.util.StringTokenizer;
class StringOp { //read the task2 class name
public static void main(String args[ ]) throws IOException
{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); //read the string
System.out.println("Enter the string: ");
String s=br.readLine();
StringTokenizer st=new StringTokenizer(s);
System.out.println("1.Convert sentence to uppercase"); //giving possibilities
System.out.println("2.Convert sentence to lowercase");
System.out.println("3.Display each word in the sentence");
System.out.println("4.Search for a word in the sentence");
System.out.println("5.Replace space with $ symbol in the sentence");
System.out.println("6.Quit the Program");
System.out.println("Enter your choice:"); //choice reading
int x=Integer.parseInt(br.readLine());
switch(x){
case 1:
System.out.println(s.toUpperCase()); //converting to uppercase
break;
case 2:
System.out.println(s.toLowerCase()); //converting to lower case
break;
case 3:
for(;st.hasMoreElements();){ //prints each token
System.out.println(st.nextToken());
//System.out.println();
break;
}
case 4:
System.out.println("Enter sub string"); //reads substring and compares
String ss=br.readLine();
int intIndex = s.indexOf(ss);
if(intIndex == - 1){
System.out.println("Hello not found");
}else{
System.out.println("Found Hello at index "
+ intIndex);
}
break;
case 5:
System.out.println( s=s.replace(" ", "$") ); //replace the string space with $
break;
case 6:
System.exit(0); //exit from the system
default:
System.out.println("tell me what to do.. i m quit");
}
}
}OUTPUT:
Enter the string: Programming9 1.Convert sentence to uppercase 2.Convert sentence to lowercase 3.Display each word in the sentence 4.Search for a word in the sentence 5.Replace space with $ symbol in the sentence 6.Quit the Program Enter your choice: 1 PROGRAMMING9