public static void main(String[] args) { System.out.println(Calculator.concat1("Rocks")); System.out.println(Calculator.upperCase("felight")); System.out.println(Calculator.lowerCase("PRIYANKA")); System.out.println(Calculator.ToString1("Felight")); System.out.println(Calculator.trim1(" Felight ")); System.out.println(Calculator.hash1("45985")); System.out.println(Calculator.charAt1(5)); System.out.println(Calculator.codePointAt1(5)); System.out.println(Calculator.codePointBefore1(5)); System.out.println(Calculator.codePointCount1(1, 9)); System.out.println(Calculator.compareTo1("FelightRoc")); System.out.println(Calculator.compareToIgnoreCase1("felightrocksy")); System.out.println(Calculator.conatins1("k")); System.out.println(Calculator.contentEquals1("FR")); System.out.println(Calculator.endsWith1("s")); System.out.println(Calculator.equals1("FelightRcks")); System.out.println(Calculator.isEmpty1("")); System.out.println(Calculator.length1("Felight")); System.out.println(Calculator.lastIndexOf1(1)); System.out.println(Calculator.matches1("45896")); System.out.println(Calculator.replace1('F', 'f')); System.out.println(Calculator.startsWith1("h")); System.out.println(Calculator.replaceAll1("Rocks", "priyanka")); System.out.println(Calculator.substring1(4)); }