| 基本型別 | byte, char, boolean, short, int, long, float, double |
| 流程控制 | if, else, switch, case, break, default, while, do, for, continue |
| 陣列 | length (屬性，非方法) |
| 包裝類 | Byte, Character, Integer, Long, Float, Double, Boolean, Short |
| 字串方法 | length, equals, equalsIgnoreCase, compareTo, substring, concat, replace, trim |
| StringBuffer | reverse, delete, append, capacity |
| 介面 | Collection, List, Set, Map, Queue |
| 實作 | ArrayList, LinkedList, HashSet, HashMap, Vector, Stack |
| 操作 | add, remove, contains, size, clear, iterator, shuffle, Collections.sort |
| 位元組流 | InputStream, OutputStream, FileInputStream, FileOutputStream, DataInputStream, DataOutputStream |
| 字元流 | Reader, Writer, BufferedReader, BufferedWriter, FileReader, FileWriter |
| 關鍵 | flush, close, encoding, EOF |
| 容器 | JFrame, JPanel, JScrollPane, getContentPane, BorderLayout |
| 元件 | JLabel, JTextField, JTextArea, JButton, JCheckBox, JRadioButton, JComboBox |
| 事件 | ActionListener, ActionEvent, ItemListener |
| 佈局 | FlowLayout, GridLayout, BorderLayout, CENTER, LEFT, RIGHT |
