在JTextpane的所有4个边上具有相同尺寸的边框

时间:2013-04-07 06:12:32

标签: java swing border jtextpane

我正在为createLineborder设置JTextPane。但是,与JTextpane的左端和顶端相比,TextPane的右端和底部的边界线略有不同。我在网上搜索,发现它是lineborder的默认行为。那么有人可以告诉我,是否有任何边框在所有4个边都给出相等的线条尺寸?

嗨,我不能把我的代码放在一边,因为它非常庞大。所以只需在此处输入示例代码。 JPanel面板;     JTextPane窗格;

public BorderedTextPane() {
    // TODO Auto-generated constructor stub
    pane = new JTextPane();
    panel = new JPanel(null);
    JPanel innerPanel = new JPanel(null);
    innerPanel.setBounds(50,50,300,400);
    pane.setBorder(BorderFactory.createLineBorder(Color.BLACK));
    pane.setSize(new Dimension(innerPanel.getWidth(),innerPanel.getHeight()));
    innerPanel.add(pane);
    panel.add(innerPanel);
    add(panel);
    setVisible(true);
    setSize(new Dimension(500,500));
    setLocationRelativeTo(null);
}

如果缩放文本窗格或将其保存在文件中,可以清楚地看到这一点。下图可以更好地解释它。比较左右线。     enter image description here

3 个答案:

答案 0 :(得分:2)

我想说它更多地与使用null布局......

有关

enter image description here

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GridBagLayout;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextPane;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.CompoundBorder;
import javax.swing.border.EmptyBorder;

public class TestBorder {

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

    public TestBorder() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setLayout(new BorderLayout());
                frame.add(new TestPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class TestPane extends JPanel {

        public TestPane() {
            setLayout(new BorderLayout());
            setBorder(new EmptyBorder(10, 10, 10, 10));
            JTextPane pane = new JTextPane();
            JPanel panel = new JPanel(new BorderLayout());
            JPanel innerPanel = new JPanel(new BorderLayout());

            pane.setBorder(BorderFactory.createLineBorder(Color.BLACK));
            innerPanel.add(pane);
            panel.add(innerPanel);
            add(panel);
        }
    }
}

答案 1 :(得分:1)

来自JComponent#setBorder() API:

  

虽然从技术上讲,您可以在任何继承自JComponent的对象上设置边框,但许多标准Swing组件的外观实现与用户设置的边框不兼容。通常,如果要在JPanelJLabel以外的标准Swing组件上设置边框,我们建议您将组件放在JPanel中并在JPanel上设置边框{1}}。

答案 2 :(得分:0)

咨询API setBorder方法(new EmptyBorder());

以及使用变量JTextPane varible.setBorder(BorderFactory.createLineBorder(Color.xxx);