Question

我正在使用JTexPane来显示一些包含需要突出显示的部分的文字。如何正确填充空格？

import javax.swing.*;
import javax.swing.text.*;
import java.awt.*;
public class test2 {

    public static void main(String[] args) {
        final JTextPane textPane = new JTextPane();
        textPane.setContentType("text/html");
        textPane.setText("<html>" + text.replaceAll("\\n", "<br/>").replaceAll(" ", "&nbsp;").replaceAll("\\t", "&nbsp;&nbsp;") + "</html>");
        StyledDocument doc = textPane.getStyledDocument();
        SimpleAttributeSet sas = new SimpleAttributeSet();
        StyleConstants.setForeground(sas, Color.blue);
        doc.setCharacterAttributes(0, text.length(), sas, false);
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                JFrame frame = new JFrame("Test");
                frame.setPreferredSize(new Dimension(900, 800));
                frame.getContentPane().add(textPane);
                frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
                frame.pack();
                frame.setVisible(true);
            }
        });
    }


    static String text = "\n" +
            "\n" +
            " pop12 2014-01-12         just a padded text\n" +
            "                          line 2\n" +
            "                          line 3                            \n";

}

这显示以下内容：

enter image description here

Answer 1

您可以尝试定义默认的标签停止尺寸，例如http://java-sl.com/tip_default_tabstop_size.html

或者您可以通过setParagrahAttributes（）

为段落添加自定义TabSet（制表符数组）

Answer 2

设置自定义TabSet的示例：

import java.awt.*;
import javax.swing.*;
import javax.swing.text.*;

public class TextPaneTabs
{
    public static void setTabs( JTextPane textPane, int charactersPerTab)
    {
        FontMetrics fm = textPane.getFontMetrics( textPane.getFont() );
        int charWidth = fm.charWidth( 'w' );
        int tabWidth = charWidth * charactersPerTab;
//      int tabWidth = 100;

        TabStop[] tabs = new TabStop[5];

        for (int j = 0; j < tabs.length; j++)
        {
            int tab = j + 1;
            tabs[j] = new TabStop( tab * tabWidth );
        }

        TabSet tabSet = new TabSet(tabs);
        SimpleAttributeSet attributes = new SimpleAttributeSet();
        StyleConstants.setTabSet(attributes, tabSet);
        int length = textPane.getDocument().getLength();
        textPane.getStyledDocument().setParagraphAttributes(0, length, attributes, false);
    }

    private static void createAndShowUI()
    {
        JTextPane textPane = new JTextPane();
        textPane.setText("12345678\n\t1\t2\t3aaaaa\t4\t5\t6\t7\t8\n\t1\t2\t3\t4\t5\t6\t7\t8\n\t\t12345678");
        JScrollPane scrollPane = new JScrollPane( textPane );
        scrollPane.setPreferredSize( new Dimension(700, 100 ) );

        // Change the tab size to 4 characters

        setTabs( textPane, 8 );

        JFrame frame = new JFrame("SSCCE");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add( scrollPane );
        frame.setLocationByPlatform( true );
        frame.pack();
        frame.setVisible( true );
    }

    public static void main(String[] args)
    {
        EventQueue.invokeLater(new Runnable()
        {
            public void run()
            {
                createAndShowUI();
            }
        });
    }
}

如何在JTextPane中正确填充文本？

2 个答案: