Java program for 5 String operations

/* 5 string operations */

import java.io.*;
class Main
{
 public static void main(String args[]) throws Exception
 {
  BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
  System.out.println("Enter a string: ");
  String st=br.readLine();
  System.out.println();
  
  System.out.println("String operation 1");
  System.out.println("------------------");
  System.out.println("Lower case of given string: "+st.toLowerCase());
  System.out.println();
  
  System.out.println("String operation 2");
  System.out.println("------------------");
  System.out.println("Upper case of given string: "+st.toUpperCase());
  System.out.println();
  
  System.out.println("String operation 3");
  System.out.println("------------------");
  System.out.println("Length of given string: "+st.length());
  System.out.println();
  
  System.out.println("String operation 4");
  System.out.println("------------------");
  System.out.println("Character at first position of given string: "+st.charAt(0));
  System.out.println();
  
  System.out.println("String operation 5");
  System.out.println("------------------");
  char ch[]=st.toCharArray();
  System.out.println("After converting the given stringinto character array: ");
  for(int i=0;i<st.length();i++)
   System.out.print("\t"+ch[i]);
  System.out.println();
 }
}

Output