BorderLayout为较小的JLabel保留空间

问题描述 投票：1回答：1

我准备了2个JUnit样式的测试用例（sry用于奇怪的测试我不知道如何断言UI）第二个例子我有选择地剪切了字符串，但我希望能够粘贴长字符串并拥有UI切正确

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.WindowEvent;

import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

import org.junit.jupiter.api.Test;

public class testing {

    @Test
    public void howItsSupposedToLook() {
        JFrame frame = new JFrame();
        frame.setLayout(new BorderLayout());

        frame.setVisible(true);
        frame.setSize(1000, 900);

        JPanel leftPanel = new JPanel();
        leftPanel.setBackground(Color.GREEN);
        leftPanel.setLayout(new BoxLayout(leftPanel, BoxLayout.PAGE_AXIS));

// this is how it should look
        JLabel fileLabel3 = new JLabel(
                "<html><div style=\"padding-left:1px;padding-top:10px\"><div style=\"border:1px;font-size: 10px;line-height: 11px; height:23px;overflow:hidden;width:"
                        + (100) + "px;white-space:nowrap;\">" + "fsdfesfevvveeeg" + "</div></div></html>");
        leftPanel.add(fileLabel3);
//no more differences between the two from here
        frame.add(leftPanel, BorderLayout.LINE_START);

        JPanel centerPAnel = new JPanel();
        centerPAnel.setBackground(Color.RED);

        frame.add(centerPAnel, BorderLayout.CENTER);
        frame.validate();
        frame.repaint();

        boolean open = true;
        frame.addWindowListener(new java.awt.event.WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent winEvt) {

                System.exit(0);
            }
        });
        while (open) {
        }

    }

    @Test
    public void failedTest() {

        JFrame frame = new JFrame();
        frame.setLayout(new BorderLayout());

        frame.setVisible(true);
        frame.setSize(1000, 900);

        JPanel leftPanel = new JPanel();
        leftPanel.setBackground(Color.GREEN);
        leftPanel.setLayout(new BoxLayout(leftPanel, BoxLayout.PAGE_AXIS));

 // this is how it actually looks

        JLabel fileLabel = new JLabel(
                "<html><div style=\"padding-left:1px;padding-top:10px\"><div style=\"border:1px;font-size: 10px;line-height: 11px; height:23px;overflow:hidden;width:"
                        + (100) + "px;white-space:nowrap;\">"
                        + "fsdfesfevvveeegggggggggggggggggggggggevevsdffffffffffffffffffffffffffffffffffffffffffffffffffffffffh"
                        + "</div></div></html>");
        fileLabel.setMaximumSize(new Dimension(100, 40));
//no more differences between the two from here
        leftPanel.add(fileLabel);

        frame.add(leftPanel, BorderLayout.LINE_START);

        JPanel centerPAnel = new JPanel();
        centerPAnel.setBackground(Color.RED);

        frame.add(centerPAnel, BorderLayout.CENTER);
        frame.validate();
        frame.repaint();

        boolean open = true;
        frame.addWindowListener(new java.awt.event.WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent winEvt) {

                System.exit(0);
            }
        });
        while (open) {
        }

    }

}

应该如何看待（第一个（制造的）例子）：enter image description here

它看起来如何：enter image description here

对我来说，感觉就像布局没有正确识别JPanel的长度有没有人知道该怎么办？

java swing jlabel border-layout boxlayout
1个回答
0
投票

简单地使用

fileLabel.setPreferredSize(new Dimension(100, 40));

代替

fileLabel.setMaximumSize(new Dimension(100, 40));

当这个组件放置在带有布局管理器的容器中时，此setter会告诉该组件必须使用哪个大小作为“首选”

PS：对不起我的英文

最新问题
© www.soinside.com 2019 - 2024. All rights reserved.