blocks|key|1955172|text|看看这个bug：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1955173|http://bugs.sun.com/view_bug.do?bug_id=6539700|offset|length|1955174|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1A|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|C]]]]

Take a look at this bug:

<a href="http://bugs.sun.com/view_bug.do?bug_id=6539700" rel="nofollow">http://bugs.sun.com/view_bug.do?bug_id=6539700</a>

blocks|key|1741786|text|您好，我也遇到过同样的问题，但我找到了一个解决方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1741787|只需创建JTextPane的扩展类即可。|1741788|++++++++MyWrapJTextPane+extends+JTextPane|code-block|syntax|javascript|1741789|并覆盖以下方法-它起作用;-)|1741790|++++++++public+boolean+getScrollableTracksViewportWidth()+{
++++++++++++return+true;
++++++++}|1741791|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Hi I've had the same problem but found a work-around:

just create an extended class of JTextPane e.g.

<pre><code> MyWrapJTextPane extends JTextPane
</code></pre>

and overwrite the following method - it works ;-)

<pre><code> public boolean getScrollableTracksViewportWidth() {
 return true;
 }
</code></pre>

blocks|key|1741809|text|从@dk89捕捉到的不错，但遗憾的是，给定的变通方法不起作用:JDK7显然仍然不提供在JTextComponent上设置自定义BreakIterator的等待；甚至在GlyphView上也不提供，在GlyphView上，BreakIterator的生成是私有的。如果我们逐个字符地插入字符串char，它仍然不起作用:我假设具有相同样式(AttributeSet)的连续文本串折叠在一起。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1741810|我花了两天的时间尝试做一个自定义的EditorKit，就像其他地方建议的那样，但它并不像文本那样工作得很好(至少对于JDK+1.7.0_4+)。|1741811|我尝试了在How+to+word+wrap+text+stored+in+JTextPanes+which+are+cells+in+a+JList给出的解决方案和在http://www.experts-exchange.com/Programming/Languages/Java/Q_20393892.html找到的一个变体|offset|length|1741812|但我发现，当breakView小于句子中最长的单词时，将不再调用JTextPane。因此，当只有一个(长)单词时，它根本不起作用。这就是我们的情况，因为我们在相当小的空间中显示用户提供的类似标识符的字符串，通常没有空格。|1741813|我最终找到了一个简单的解决方案，源自bug报告中的建议:确实，逐个字符地插入字符串char，但要有不同的样式！因此，我们有和字符一样多的段，字符串被包装在字符的边界上。直到下一个"bug修复“？|1741814|代码片段：|1741815|private+JTextPane+tp;
private+SimpleAttributeSet+sas+=+new+SimpleAttributeSet();

tp=+new+JTextPane();
sas.addAttribute(+"A",+"C"+);+//+Arbitrary+attribute+names+and+value,+not+used+actually

++++//+Set+the+global+attributes+(italics,+etc.)
++++tp.setParagraphAttributes(styleParagraphAttributes,+true);

++++Document+doc+=+tp.getDocument();
++++try
++++{
++++++++doc.remove(0,+doc.getLength());+//+Clear
++++++++for+(int+i+=+0;+i+<+textToDisplay.length();+i%2B%2B)
++++++++{
++++++++++++doc.insertString(doc.getLength(),+textToDisplay.substring(i,+i%2B1),
++++++++++++++++++++//+Change+attribute+every+other+char
++++++++++++++++++++i+%25+2+==+0+?+null+:+sas);
++++++++}
++++}
++++catch+(BadLocationException+ble)
++++{
++++++++log.warn("Cannot+happen...",+ble);
++++}|code-block|syntax|javascript|1741816|正如bug中所述，它们应该提供一种简单的方法(可能是一些属性，或者一些可注入的东西)来恢复到旧的行为。|1741817|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/6866627/how-to-word-wrap-text-stored-in-jtextpanes-which-are-cells-in-a-jlist|1|http://www.experts-exchange.com/Programming/Languages/Java/Q_20393892.html^0|0|0|5|1X|0|2B|22|1|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|15|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|16|8|@]|9|@$F|17|G|18|1|19]|$F|1A|G|1B|1|1C]]|A|$]]|$1|H|3|I|5|6|7|1D|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1E|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|1F|8|@]|9|@]|A|$]]|$1|N|3|O|5|P|7|1G|8|@]|9|@]|A|$Q|R]]|$1|S|3|T|5|6|7|1H|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1I|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]|12|$5|X|Y|Z|A|$10|13]]]]

Good catch from @dk89, but alas the given workarounds don't work: JDK 7 apparently still doesn't offer a wait to set a custom BreakIterator on a JTextComponent; not even on a GlyphView, where the generation of the BreakIterator is private. And if we insert the string char by char, it still doesn't work: I suppose the consecutive runs of text with identical style (AttributeSet) are collapsed together.

I have spent two days trying to do a custom EditorKit, as advised elsewhere, but it doesn't work well (with JDK 1.7.0_4 at least) as the text.

I tried the solution given at <a href="https://stackoverflow.com/questions/6866627/how-to-word-wrap-text-stored-in-jtextpanes-which-are-cells-in-a-jlist">How to word wrap text stored in JTextPanes which are cells in a JList</a> and a variant found at <a href="http://www.experts-exchange.com/Programming/Languages/Java/Q_20393892.html" rel="nofollow noreferrer">http://www.experts-exchange.com/Programming/Languages/Java/Q_20393892.html</a>

But I found out that the breakView is no longer called when the JTextPane is smaller than the longest word in the sentence. So it doesn't work at all when there is only one (long) word. That's our case, as we display user-provided, identifier-like strings, often without spaces, in rather small spaces.

I finally found a simple solution, derived from the suggestion in the bug report: indeed, insert the string char by char, but alternate styles! Thus, we have as many segments as we have chars, and the string is wrapped at char bounds. Until the next "bug fix"?

Code snippets:

<pre><code>private JTextPane tp;
private SimpleAttributeSet sas = new SimpleAttributeSet();

tp= new JTextPane();
sas.addAttribute( "A", "C" ); // Arbitrary attribute names and value, not used actually

 // Set the global attributes (italics, etc.)
 tp.setParagraphAttributes(styleParagraphAttributes, true);

 Document doc = tp.getDocument();
 try
 {
 doc.remove(0, doc.getLength()); // Clear
 for (int i = 0; i &lt; textToDisplay.length(); i++)
 {
 doc.insertString(doc.getLength(), textToDisplay.substring(i, i+1),
 // Change attribute every other char
 i % 2 == 0 ? null : sas);
 }
 }
 catch (BadLocationException ble)
 {
 log.warn("Cannot happen...", ble);
 }
</code></pre>

As stated in the bug, they should have provided an easy way (some property perhaps, or some injectable stuff) to revert to the old behavior.

blocks|key|1955221|text|对我来说，这个修复是有效的(在1.7.0_09下测试)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1955222|import+javax.swing.*;
import+javax.swing.text.*;
import+java.awt.*;

public+class+WrapTestApp+extends+JFrame+{

++++public+static+void+main+(+String[]+args+)+{
++++++++new+WrapTestApp();
++++}

++++public+WrapTestApp+()+{
++++++++setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
++++++++setSize(200,200);
++++++++getContentPane().setLayout(new+BorderLayout());
++++++++JTextPane+jtp+=+new+JTextPane();
++++++++jtp.setEditorKit(new+WrapEditorKit());
++++++++JScrollPane+jsp+=+new+JScrollPane(jtp);
++++++++jsp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
++++++++getContentPane().add(jsp,+BorderLayout.CENTER);
++++++++jtp.setText("ExampleOfTheWrapLongWordWithoutSpaces");
++++++++setVisible(true);
++++}

++++class+WrapEditorKit+extends+StyledEditorKit+{
++++++++ViewFactory+defaultFactory=new+WrapColumnFactory();
++++++++public+ViewFactory+getViewFactory()+{
++++++++++++return+defaultFactory;
++++++++}

++++}

++++class+WrapColumnFactory+implements+ViewFactory+{
++++++++public+View+create(Element+elem)+{
++++++++++++String+kind+=+elem.getName();
++++++++++++if+(kind+!=+null)+{
++++++++++++++++if+(kind.equals(AbstractDocument.ContentElementName))+{
++++++++++++++++++++return+new+WrapLabelView(elem);
++++++++++++++++}+else+if+(kind.equals(AbstractDocument.ParagraphElementName))+{
++++++++++++++++++++return+new+ParagraphView(elem);
++++++++++++++++}+else+if+(kind.equals(AbstractDocument.SectionElementName))+{
++++++++++++++++++++return+new+BoxView(elem,+View.Y_AXIS);
++++++++++++++++}+else+if+(kind.equals(StyleConstants.ComponentElementName))+{
++++++++++++++++++++return+new+ComponentView(elem);
++++++++++++++++}+else+if+(kind.equals(StyleConstants.IconElementName))+{
++++++++++++++++++++return+new+IconView(elem);
++++++++++++++++}
++++++++++++}

++++++++++++//+default+to+text+display
++++++++++++return+new+LabelView(elem);
++++++++}
++++}

++++class+WrapLabelView+extends+LabelView+{
++++++++public+WrapLabelView(Element+elem)+{
++++++++++++super(elem);
++++++++}

++++++++public+float+getMinimumSpan(int+axis)+{
++++++++++++switch+(axis)+{
++++++++++++++++case+View.X_AXIS:
++++++++++++++++++++return+0;
++++++++++++++++case+View.Y_AXIS:
++++++++++++++++++++return+super.getMinimumSpan(axis);
++++++++++++++++default:
++++++++++++++++++++throw+new+IllegalArgumentException("Invalid+axis:+"+%2B+axis);
++++++++++++}
++++++++}

++++}
}|code-block|syntax|javascript|1955223|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For me the fix works (tested under 1.7.0_09)

<pre><code>import javax.swing.*;
import javax.swing.text.*;
import java.awt.*;

public class WrapTestApp extends JFrame {

 public static void main ( String[] args ) {
 new WrapTestApp();
 }

 public WrapTestApp () {
 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 setSize(200,200);
 getContentPane().setLayout(new BorderLayout());
 JTextPane jtp = new JTextPane();
 jtp.setEditorKit(new WrapEditorKit());
 JScrollPane jsp = new JScrollPane(jtp);
 jsp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
 getContentPane().add(jsp, BorderLayout.CENTER);
 jtp.setText("ExampleOfTheWrapLongWordWithoutSpaces");
 setVisible(true);
 }

 class WrapEditorKit extends StyledEditorKit {
 ViewFactory defaultFactory=new WrapColumnFactory();
 public ViewFactory getViewFactory() {
 return defaultFactory;
 }

 }

 class WrapColumnFactory implements ViewFactory {
 public View create(Element elem) {
 String kind = elem.getName();
 if (kind != null) {
 if (kind.equals(AbstractDocument.ContentElementName)) {
 return new WrapLabelView(elem);
 } else if (kind.equals(AbstractDocument.ParagraphElementName)) {
 return new ParagraphView(elem);
 } else if (kind.equals(AbstractDocument.SectionElementName)) {
 return new BoxView(elem, View.Y_AXIS);
 } else if (kind.equals(StyleConstants.ComponentElementName)) {
 return new ComponentView(elem);
 } else if (kind.equals(StyleConstants.IconElementName)) {
 return new IconView(elem);
 }
 }

 // default to text display
 return new LabelView(elem);
 }
 }

 class WrapLabelView extends LabelView {
 public WrapLabelView(Element elem) {
 super(elem);
 }

 public float getMinimumSpan(int axis) {
 switch (axis) {
 case View.X_AXIS:
 return 0;
 case View.Y_AXIS:
 return super.getMinimumSpan(axis);
 default:
 throw new IllegalArgumentException("Invalid axis: " + axis);
 }
 }

 }
}
</code></pre>

In all versions of Java up to 6, the default behaviour of a JTextPane put inside a JScrollPane was: wrap lines at word boundaries if possible. If not, then wrap them anyway.

In JDK 7, the default behaviour seems to be: wrap lines at word boundaries if possible. If not, just expand the width of the JTextPane (never wrap long words).

It is easy to reproduce this, here is a SSCCE:

<pre><code>
public class WrappingTest extends JFrame
{

 public static void main ( String[] args )
 {
 new WrappingTest(); 
 }

 public WrappingTest ()
 {
 setSize(200,200);
 getContentPane().setLayout(new BorderLayout());
 JTextPane jtp = new JTextPane();
 JScrollPane jsp = new JScrollPane(jtp);
 jsp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
 getContentPane().add(jsp,BorderLayout.CENTER);
 setVisible(true);
 }

}
</code></pre>

Just run it in JDK 6 and in JDK 7, write some small words, and write a long word, and you will see the difference.

My question is simple... the new default behaviour in JDK 7 totally messes a program of mine (they should be more careful at Oracle with changing this kind of defaults... they seem unimportant but when you're using a JTextPane to display data that usually contains very long strings of letters, they're not so unimportant - in fact I'm going to file a bug report, but I'd like to have a workaround while/if they don't resolve it). Any way to go back to the previous behaviour?

Note that I have checked the answer to the related question <a href="https://stackoverflow.com/questions/7036543/how-is-word-wrapping-implemented-in-jtextpane-and-how-do-i-make-it-wrap-a-strin">How is word-wrapping implemented in JTextPane, and how do I make it wrap a string without spaces?</a> but it doesn't answer this question - it provides a way of making the JTextPane wrap without any regard at all for whitespace, but for me the desired behaviour is split lines at whitespace if possible, and elsewhere if not possible (as in previous Java versions).

Wrap long words in JTextPane (Java 7)

Java

在Java6之前的所有版本中，放在JScrollPane中的JTextPane的默认行为是:如果可能，在单词边界处换行。如果没有，那么无论如何都要包装它们。在JDK 7中，默认行为似乎是:如果可能，在单词边界处换行。如果不是，只需扩展JTextPane的宽度(不要换行过长的单词)。这很容易重现，这是一个SSCCE：pu...

问在JTextPane中对长词进行换行(Java7)
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