2

请参阅下面的 SSCCE：

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.EventQueue;

import javax.swing.Box;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JToolBar;
import javax.swing.UIManager;
import javax.swing.border.EtchedBorder;


@SuppressWarnings("serial")
public class GlueTest extends JComponent {

    private JFrame frame;
    private JToolBar toolbar;
    private JLabel label_1;
    private JTextField textField_1;
    private JLabel label_2;
    private JTextField textField_2;

    public static void main(String[] args) {
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        } catch (Throwable e) {
            e.printStackTrace();
        }
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    GlueTest window = new GlueTest();
                    window.frame.setVisible(true);
                    window.frame.requestFocusInWindow();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    public GlueTest() {
        initialize();
    }

    private void initialize() {
        frame = new JFrame("Test");
        frame.setBounds(0,0,800,600);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        toolbar = new JToolBar();
        toolbar.setFloatable(false);
        toolbar.setBorder(new EtchedBorder(EtchedBorder.LOWERED, null, null));
        toolbar.setMaximumSize(new Dimension(frame.getWidth(), frame.getHeight()));
        frame.getContentPane().add(toolbar, BorderLayout.NORTH);

        Component horizontalGlue = Box.createHorizontalGlue();
        toolbar.add(horizontalGlue);

        label_1 = new JLabel(" 1 ");
        toolbar.add(label_1);

        textField_1 = new JTextField();
        textField_1.setColumns(9);
        textField_1.setMaximumSize(textField_1.getPreferredSize());
        toolbar.add(textField_1);

        label_2 = new JLabel(" 2 ");
        toolbar.add(label_2);

        textField_2 = new JTextField();
        textField_2.setColumns(9);
        textField_2.setMaximumSize(textField_2.getPreferredSize());
        toolbar.add(textField_2);
    }
}

请注意，我使用的是“系统”外观。在 Windows 7 中，它显示完美。文本字段自动调整到最大大小，左侧的水平粘连尽可能地增长，迫使它们右对齐。

在此处输入图像描述

但是，在 Linux（如果重要的话，Ubuntu 12.04）中，它最终会大不相同。文本字段直接从框架中滚动！水平胶水本身的尺寸太大。

在此处输入图像描述

我尝试了其他几种不同的方法来让它在两者中正确显示，但没有运气。事实上，我能让它在 Linux 中正确显示的唯一方法是删除文本字段的所有样式（最大宽度、列等），然后它成功地不滚动框架，但它没有用，因为它只有几个像素的宽度。

作为旁注，我什至没有机会尝试 Mac OS，但我很好奇结果如何。

4

2 回答 2

3

作为替代方案，请考虑将JToolBar布局更改为FlowLayout.RIGHT.

Ubuntu 截图

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JToolBar;
import javax.swing.border.EtchedBorder;

public class Test extends JComponent {

    public Test() {
        JToolBar toolbar = new JToolBar();
        toolbar.setBorder(new EtchedBorder(EtchedBorder.LOWERED, null, null));
        toolbar.setLayout(new FlowLayout(FlowLayout.RIGHT));
        toolbar.add(new JLabel("1"));
        toolbar.add(new JTextField(9));
        toolbar.add(new JLabel("2"));
        toolbar.add(new JTextField(9));

        JFrame frame = new JFrame("Test");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(toolbar, BorderLayout.NORTH);
        frame.add(new JTextArea(10, 40));
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                Test window = new Test();
            }
        });
    }
}
于 2013-03-18T17:06:35.487 回答
2

问题（不是 ***nix 用户），你对这段代码有同样的问题吗

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import javax.swing.Box;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JToolBar;
import javax.swing.border.EtchedBorder;

@SuppressWarnings("serial")
public class GlueTest extends JComponent {

    private JFrame frame;
    private JToolBar toolbar;
    private JLabel label_1;
    private JTextField textField_1;
    private JLabel label_2;
    private JTextField textField_2;

    public GlueTest() {
        toolbar = new JToolBar();
        toolbar.setFloatable(false);
        toolbar.setBorder(new EtchedBorder(EtchedBorder.LOWERED, null, null));
        toolbar.setAlignmentY(TOP_ALIGNMENT);
        toolbar.add(Box.createHorizontalGlue());

        label_1 = new JLabel(" 1 ");        
        toolbar.add(label_1);
        toolbar.add(Box.createRigidArea(new Dimension(10,1)));

        textField_1 = new JTextField();
        textField_1.setColumns(9);
        textField_1.setMaximumSize(textField_1.getPreferredSize());
        toolbar.add(textField_1);
        toolbar.add(Box.createHorizontalStrut(10));

        label_2 = new JLabel(" 2 ");
        toolbar.add(label_2);
        toolbar.add(Box.createRigidArea(new Dimension(10,1)));

        textField_2 = new JTextField();
        textField_2.setColumns(9);
        textField_2.setMaximumSize(textField_2.getPreferredSize());
        toolbar.add(textField_2);
        toolbar.add(Box.createHorizontalStrut(10));

        frame = new JFrame("Test");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(toolbar, BorderLayout.NORTH);
        frame.add(new JTextArea(10, 40));
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                GlueTest window = new GlueTest();
            }
        });
    }
}

将内置 BoxLayout 切换到 BorderLayout

import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JToolBar;
import javax.swing.border.EtchedBorder;

@SuppressWarnings("serial")
public class GlueTest extends JComponent {

    private JFrame frame;
    private JToolBar toolbar;
    private JLabel label_1;
    private JTextField textField_1;
    private JLabel label_2;
    private JTextField textField_2;

    public GlueTest() {
        toolbar = new JToolBar();
        toolbar.setFloatable(false);
        toolbar.setBorder(new EtchedBorder(EtchedBorder.LOWERED, null, null));
        toolbar.setLayout(new BorderLayout(10, 10)); 
        JPanel panel = new JPanel();
        panel.setOpaque(false);
        label_1 = new JLabel("1");        
        panel.add(label_1);
        textField_1 = new JTextField();
        textField_1.setColumns(9);
        panel.add(textField_1);
        label_2 = new JLabel("2");
        panel.add(label_2);
        textField_2 = new JTextField();
        textField_2.setColumns(9);
        panel.add(textField_2);
        toolbar.add(panel, BorderLayout.EAST);
        frame = new JFrame("Test");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(toolbar, BorderLayout.NORTH);
        frame.add(new JTextArea(10, 40));
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                GlueTest window = new GlueTest();
            }
        });
    }
}
于 2013-03-18T09:20:00.840 回答