Some of the methods of String class in Java
String first = "Wissam"; String last = new String("Fawaz");
System.out.println(first.charAt(0)); // W
System.out.println(last.charAt(last.length() - 1)); // z
String full = first.concat(" ").concat(last);
System.out.println(full); // Wissam Fawaz
System.out.println(first.toUpperCase()); // WISSAM
System.out.println(last.toLowerCase()); // fawaz
System.out.println(first.equals(last)); // false
System.out.println(full.substring(full.indexOf(' ') + 1)); // Fawaz
System.out.println(full.indexOf('a')); // 4
System.out.println(full.lastIndexOf('a')); // 10
System.out.println(first.replace('s', 'x')); // Wixxam