我已经尝试了几天使我的代码正常工作,但没有成功。
我认为我的代码解释了我的问题。我不知道如何在组合框项目中看到“ Serif”这样的内容。.我看到该动作的哈希码。.该代码中的注释部分是我未能成功使其正常工作的尝试。
我认为这是我的代码的解决方案,但我无法正常工作:
action listener in another class - java
public class ComboBoxFontFamilyAction extends JFrame implements ItemListener {
public ComboBoxFontFamilyAction() {
JComboBox comboBox = new JComboBox();
comboBox.addItem(new StyledEditorKit.ForegroundAction("Red", Color.red));
comboBox.addItem(new StyledEditorKit.FontFamilyAction("Serif"
.toString(), "Serif"));
// When I click on this item I get the error
comboBox.addItem(new FontSetting(new StyledEditorKit.ForegroundAction(
"Red", Color.red), "Read what you want", comboBox));
comboBox.addItemListener(this);
getContentPane().add(comboBox, BorderLayout.SOUTH);
JTextPane textPane = new JTextPane();
textPane.setText("Some text to change attributes of.");
getContentPane().add(new JScrollPane(textPane));
// I think that i should do something like that
// ItemListener itemListener = new FontSetting(new
// StyledEditorKit.ForegroundAction("Red", Color.red),
// "Wohoo",comboBox);
// comboBox.addItemListener(itemListener);
}
public void itemStateChanged(ItemEvent e) {
Action action = (Action) e.getItem();
action.actionPerformed(null);
}
public static void main(String[] args) {
ComboBoxFontFamilyAction frame = new ComboBoxFontFamilyAction();
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.setSize(300, 300);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}
//public class FontSetting implements ItemListener {
public class FontSetting {
private StyledEditorKit.StyledTextAction textAction;
private String displayValue;
// private JComboBox comboBox1;
public FontSetting(StyledEditorKit.StyledTextAction textAction,
String displayValue, JComboBox comboBox1) {
this.textAction = textAction;
this.displayValue = displayValue;
// this.comboBox1 = comboBox1;
}
// public void itemStateChanged(ItemEvent e) {
// Action action = (Action) e.getItem();
// action.actionPerformed(null);
// }
public String toString() {
return displayValue;
}
}
提前感谢任何帮助:)
最佳答案
您看到哈希码的原因可能是因为您没有覆盖toString()
的StyledEditorKit.FontFamilyAction
方法。
您应该重写它以返回合理的字符串(“ Serif”),或使用JComboBox.setRenderer(ListCellRenderer)
设置将将创建的StyledEditorKit.FontFamilyAction
渲染为合理文本的自定义渲染器。