如何使用JTextArea

1、创建并初始化

textArea = new JTextArea(5, 20);
jscrollPane scrollPane = new JScrollPane(textArea);
textArea.setEditable(false);

private final static String newline = "\n";
...
textArea.append(text + newline

textArea.setCaretPosition(textArea.getDocument().getLength());

 

JTextArea textArea = new JTextArea(
    "This is an editable JTextArea. " +
    "A text area is a \"plain\" text component, " +
    "which means that although it can display text " +
    "in any font, all of the text is in the same font."
);
textArea.setFont(new Font("Serif", Font.ITALIC, 16));
textArea.setLineWrap(true);
textArea.setWrapStyleWord(true);

 

JScrollPane areaScrollPane = new JScrollPane(textArea);
areaScrollPane.setVerticalScrollBarPolicy(
  JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
areaScrollPane.setPreferredSize(new Dimension(250, 250));

2、事件相关

textArea.getDocument().addDocumentListener(this);