如何将JEditorPane插入JTable单元格? [英] How to insert JEditorPane into JTable cell?
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问题描述
我想把JEditorPane放在JTable单元格中。
我写了这个:
I want to put JEditorPane in JTable cell. I've written this:
jTabel1.setDefaultRenderer(String.class, new StringEditorPane());
.........
class StringEditorPane extends JEditorPane
implements TableCellRenderer {
public StringEditorPane() {
setContentType("text/html");
}
public Component getTableCellRendererComponent(
JTable table, Object styledString,
boolean isSelected, boolean hasFocus,
int row, int column) {
if (isSelected) {
String styledText = (String) styledString;
setText(styledText);
setBackground(getSelectionColor());
return this;
} else {
String styledText = (String) styledString;
setText(styledText);
setBackground(Color.white);
return this;
}
}
}
我可以编译它和它显示JEditorPane,但它也抛出异常,我不知道为什么。
I can compile it and it show JEditorPane but it also throws an exception and I don't know why.
异常:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at javax.swing.text.DefaultStyledDocument.getParagraphElement(DefaultStyledDocument.java:445)
at javax.swing.text.StyledEditorKit$AttributeTracker.updateInputAttributes(StyledEditorKit.java:223)
at javax.swing.text.StyledEditorKit$AttributeTracker.caretUpdate(StyledEditorKit.java:258)
at javax.swing.text.JTextComponent.fireCaretUpdate(JTextComponent.java:391)
at javax.swing.text.JTextComponent$MutableCaretEvent.fire(JTextComponent.java:4387)
at javax.swing.text.JTextComponent$MutableCaretEvent.stateChanged(JTextComponent.java:4409)
at javax.swing.text.DefaultCaret.fireStateChanged(DefaultCaret.java:782)
at javax.swing.text.DefaultCaret.changeCaretPosition(DefaultCaret.java:1257)
at javax.swing.text.DefaultCaret.handleSetDot(DefaultCaret.java:1153)
at javax.swing.text.DefaultCaret.setDot(DefaultCaret.java:1134)
at javax.swing.text.DefaultCaret$Handler.removeUpdate(DefaultCaret.java:1777)
at javax.swing.text.AbstractDocument.fireRemoveUpdate(AbstractDocument.java:243)
at javax.swing.text.AbstractDocument.handleRemove(AbstractDocument.java:608)
at javax.swing.text.AbstractDocument.remove(AbstractDocument.java:576)
at javax.swing.JEditorPane.setText(JEditorPane.java:1493)
at myProject.StringEditorPane.getTableCellRendererComponent(MainWindow.java:136)
at javax.swing.JTable.prepareRenderer(JTable.java:5720)
........
来自MainWindow.java的136行:
And the 136 line from MainWindow.java:
setText(styledText);
。
推荐答案
似乎从删除旧内容引发了崩溃。
尝试用新实例替换文档。在setText()之前调用
It seems the crash is thrown from removing old content. Try to replace document with a new instance. Before setText() call
setDocument(getEditorKit().createDefaultDocument());
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