Methods of the String Class | Java

length();
charAt(0);
concat(“Hi”);
toUpperCase();
toLowerCase();
trim();
equals(var);
equalsIgnoreCase(var);
compareTo(var);
compareToIgnoreCase(var);
startsWith(prefix);
endsWith(suffix);
contains(var);
substring(0, 6);
indexOf(“A”);
lastIndexOf(“A”);
Integer.parseInt(stringvar) ;
Double.parseDouble(Stringvar);