fundamental classes
Arrays class
      asList(...) method of Arrays
      binarySearch(...) method of Arrays
      equals(...) method of Arrays
      fill(...) method of Arrays
      sort(...) method of Arrays
DateFormat class
Math class
      abs(...) method of Math
      ceil(...) method
      floor(...) method of Math
      exp(...) method of Math
      max(...) method of Math
      min(...) method of Math
      rint(...) method of Math
      round(...) method of Math
      pow(...) method of Math
      random(...) method of Math
      sqrt(...) method of Math
      trigonomic functions of Math
String class
      .charAt(...) method of String
      .concat(...) method of String
      .equalsIgnoreCase(...) method of String
      .getChars(...) method of String
      .indexOf(...) method of String
      .length( ) method of String
      .replace(...) method of String
      .substring(...) method of String
      .trim( ) method of String
StringBuffer class
      .append(...) method of StringBuffer
      .charAt(...) method of StringBuffer
      .getChars(...) method of StringBuffer
      .indexOf(...) method of StringBuffer
      .insert(...) method of StringBuffer
      .setLength(...) method of StringBuffer
StringTokenizer class
System class
      getProperty(...) method of System
      arrayCopy(...) method of System
wrapper classes in general
      Boolean wrapper class
      Character wrapper class