ChangeStringCase Problem Statement Given a string as input, the expected output is a string where the case of all alphabets has been changed.

/*
ChangeStringCase
Problem Statement

Given a string as input, the expected output is a string where the case of all alphabets has been changed.
 */
package Module2.module2a.module2c;

import static java.lang.Character.isLowerCase;
import static java.lang.Character.isUpperCase;

/**
 *
 * @author SUNIL
 */
public class ChangeStringCase {

 static String testcase1 = "Trisect";

 public static void main(String args[]){
 ChangeStringCase testInstance= new ChangeStringCase();
 String result = testInstance.changeCase(testcase1);
 System.out.println(result);
 }

 public String changeCase(String sentence){
     String newString="";
 for(int i=0;i<(sentence.length());i++){
     //if(sentence.charAt(i)>=65&&sentence.charAt(i)<=90){
     char eachChar=sentence.charAt(i);
     if(isUpperCase(eachChar)){  
     System.out.println("AAAA"+i);
          char changedCase=Character.toLowerCase(sentence.charAt(i));
        
        newString=newString+changedCase;

     }
     else if(isLowerCase(eachChar)){
         System.out.println("aaaaaa"+i);
          char changedCase=Character.toUpperCase(sentence.charAt(i));
         newString=newString+changedCase;
      
     }
     else{
     
         char digit=sentence.charAt(i);
         newString=newString+digit;
        
     }
 }
return newString;
 }
}