public void init() {
// 添加按钮
JPanel buttonPanel = new JPanel();
buttonPanel.add(okButton);
mainPanel.setLayout(new GridLayout(0, 3));
mainWin.add(mainPanel, BorderLayout.CENTER);
JFormattedTextField intField0 =
new JFormattedTextField(
new InternationalFormatter(NumberFormat.getIntegerInstance()) {
protected DocumentFilter getDocumentFilter() {
return new NumberFilter();
}
});
intField0.setValue(100);
addRow("只接受数字的文本框", intField0);
JFormattedTextField intField1 = new JFormattedTextField(NumberFormat.getIntegerInstance());
intField1.setValue(new Integer(100));
// 添加输入校验器
intField1.setInputVerifier(new FormattedTextFieldVerifier());
addRow("带输入校验器的文本框", intField1);
// 创建自定义格式器对象
IPAddressFormatter ipFormatter = new IPAddressFormatter();
ipFormatter.setOverwriteMode(false);
// 以自定义格式器对象创建格式化文本框
JFormattedTextField ipField = new JFormattedTextField(ipFormatter);
ipField.setValue(new byte[] {(byte) 192, (byte) 168, 4, 1});
addRow("IP地址格式", ipField);
mainWin.add(buttonPanel, BorderLayout.SOUTH);
mainWin.pack();
mainWin.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainWin.setVisible(true);
}
// 当输入组件失去焦点时，该方法被触发
public boolean verify(JComponent component) {
JFormattedTextField field = (JFormattedTextField) component;
// 返回用户输入是否有效
return field.isEditValid();
}