scrollPane的setViewportView方法

隔壁老王爱单排 2019-04-30 09:16:23

新建一个表格table，然后再scrollPane.setViewportView(table)，这是为了使添加到滚动面板中的表格table可以显示滚动条吗请教大神们

...全文

493 回复打赏收藏转发到动态举报

写回复

回复

切换为时间正序

请发表友善的回复…

发表回复

14.2 容器组件与辅助组件 ;2;Container（容器）、Component对象、Jcomponent对象等可以有对字体、颜色、大小、工具提示文本及边界等属性的操作方法。 .setToolTipText(字符串)，设置组件的工具提示文本 .setBorder(Border对象), 设置组件的边界 Javax.swing.border.Border 类带标题的边界:new TitledBorder(字符串) 线边界：:new LineBorder(颜色，粗细值) 以上两个边界修饰不能同时设置;4;5;6;7;8;JScrollPane（即滚动条面板）是swing中很常用的一种中间级容器，它和JPanel的差别在于JScrollPane会带滚动条。 JTextArea(文本区域)、JTable（表格）等数据量比较大的控件都需要放置在JScrollPane中，当数据超过JScrollPane区域时，JScrollPane会出现滚动条，用户可以拖动滚动条查看数据。方法一：滚动面板.setViewportView(文本区域组件) 方法二：new JScrollPane(文本区域组件）；

编写java浏览器程序 * * Explorer.java * * Created on 2009年6月20日 */ package container; /** * * @author Administrator */ public class Explorer extends javax.swing.JFrame { /** Creates new form Explorer */ public Explorer() { initComponents(); } /** This method is called from within the constructor to * initialize the form. * WARNING: Do NOT modify this code. The content of this method is * always regenerated by the Form Editor. */ @SuppressWarnings("unchecked") // private void initComponents() { jPanel1 = new javax.swing.JPanel(); jLabelSite = new javax.swing.JLabel(); jTextFieldAddress = new javax.swing.JTextField(); jButtonGo = new javax.swing.JButton(); jScrollPane1 = new javax.swing.JScrollPane(); jEditorPaneHTML = new javax.swing.JEditorPane(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); jLabelSite.setFont(new java.awt.Font("宋体", 1, 14)); // NOI18N jLabelSite.setText("地址："); jButtonGo.setText("转到"); jButtonGo.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButtonGoActionPerformed(evt); } }); javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1); jPanel1.setLayout(jPanel1Layout); jPanel1Layout.setHorizontalGroup( jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel1Layout.createSequentialGroup() .addGap(75, 75, 75) .addComponent(jLabelSite) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jTextFieldAddress, javax.swing.GroupLayout.PREFERRED_SIZE, 276, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(2, 2, 2) .addComponent(jButtonGo, javax.swing.GroupLayout.PREFERRED_SIZE, 69, javax.swing.GroupLayout.PREFERRED_SIZE) .addContainerGap(70, Short.MAX_VALUE)) ); jPanel1Layout.setVerticalGroup( jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel1Layout.createSequentialGroup() .addGap(19, 19, 19) .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jButtonGo) .addComponent(jLabelSite) .addComponent(jTextFieldAddress, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) ); jEditorPaneHTML.setEditable(false); jEditorPaneHTML.addHyperlinkListener(new javax.swing.event.HyperlinkListener() { public void hyperlinkUpdate(javax.swing.event.HyperlinkEvent evt) { jEditorPaneHTMLHyperlinkUpdate(evt); } }); jScrollPane1.setViewportView(jEditorPaneHTML); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addGroup(layout.createSequentialGroup() .addGap(27, 27, 27) .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 483, javax.swing.GroupLayout.PREFERRED_SIZE) .addContainerGap()) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 312, Short.MAX_VALUE) .addContainerGap()) ); pack(); }// private void jButtonGoActionPerformed(java.awt.event.ActionEvent evt) { String myURL=this.jTextFieldAddress.getText().trim(); try{ if(myURL!=null&&!myURL.equals("")) jEditorPaneHTML.setPage(myURL); }catch(java.io.IOException e){ e.printStackTrace(); } } private void jEditorPaneHTMLHyperlinkUpdate(javax.swing.event.HyperlinkEvent evt) { try{ if(evt.getEventType()==javax.swing.event.HyperlinkEvent.EventType.ACTIVATED) jEditorPaneHTML.setPage(evt.getURL()); }catch(java.io.IOException e){ e.printStackTrace(); } } /** * @param args the command line arguments */ public static void main(String args[]) { java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new Explorer().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JButton jButtonGo; private javax.swing.JEditorPane jEditorPaneHTML; private javax.swing.JLabel jLabelSite; private javax.swing.JPanel jPanel1; private javax.swing.JScrollPane jScrollPane1; private javax.swing.JTextField jTextFieldAddress; // End of variables declaration }

服务器与客户端应用 package test; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import java.io.*; import java.net.ServerSocket; import java.net.Socket; import javax.swing.*; public class EchoServerTest extends JFrame implements Runnable{ JTextArea textArea; JTextArea textArea1; ServerSocket serverSocket; Socket socket; SenderButton sender; JButton button1; JButton button2; JButton button3; JScrollPane jScrollPane1; JPanel panel1; JPanel panel2; public EchoServerTest(){ super("服务器窗口"); this.setJMenuBar(createMenuBar()); button1=new JButton("发送"); button2=new JButton("保存"); button3=new JButton("退出"); jScrollPane1=new JScrollPane(); textArea=new JTextArea(5,20); textArea1=new JTextArea(1,20); textArea.setEditable(false); textArea.setForeground(Color.pink); jScrollPane1.add(textArea); jScrollPane1.setViewportView(textArea); panel1=new JPanel(new FlowLayout()); panel1.add(button1); panel1.add(button2); panel1.add(button3); panel2=new JPanel(new BorderLayout()); panel2.add("Center",textArea1); panel2.add("South",panel1); this.getContentPane().setLayout(new BorderLayout()); this.getContentPane().add("Center",jScrollPane1); this.getContentPane().add("South",panel2); this.setVisible(true); this.pack(); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); button1.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { sender.GetString(textArea1.getText()); textArea.append("EchoServerTest:"+textArea1.getText()+"\n"); textArea1.setText(null); } }); button2.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { try { JFileChooser fileChooser=new JFileChooser("C:\\"); fileChooser.setDialogTitle("请选择您要保存的路径"); if(fileChooser.showOpenDialog(null)==JFileChooser.APPROVE_OPTION){ File file=fileChooser.getSelectedFile(); } BufferedWriter b=new BufferedWriter(new OutputStreamWriter(new FileOutputStream(fileChooser.getSelectedFile(),true))); b.write(textArea.getText()); b.flush(); b.close(); } catch (Exception e1) { e1.printStackTrace(); } } }); button3.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { System.exit(0); } }); Thread thread=new Thread(this); thread.start(); } public JMenuBar createMenuBar() { JMenuBar menuBar; JMenu menu, submenu; JMenuItem menuItem; JRadioButtonMenuItem rbMenuItem; JCheckBoxMenuItem cbMenuItem; menuBar = new JMenuBar(); menu = new JMenu("文件(F)"); menu.setMnemonic(KeyEvent.VK_F); menuBar.add(menu); submenu = new JMenu("新建(N)"); submenu.setMnemonic(KeyEvent.VK_N); menuItem = new JMenuItem("新建文件(D)"); submenu.add(menuItem); menuItem = new JMenuItem("复制当前页(C)"); submenu.add(menuItem); menu.add(submenu); menu.addSeparator(); menuItem = new JMenuItem("退出(x)"); menu.add(menuItem); menu = new JMenu("查看(V)"); menu.setMnemonic(KeyEvent.VK_V); menuBar.add(menu); submenu = new JMenu("工具栏"); cbMenuItem = new JCheckBoxMenuItem("菜单栏(M)"); cbMenuItem.setMnemonic(KeyEvent.VK_M); submenu.add(cbMenuItem); cbMenuItem = new JCheckBoxMenuItem("地址栏(A)"); cbMenuItem.setMnemonic(KeyEvent.VK_A); submenu.add(cbMenuItem); cbMenuItem = new JCheckBoxMenuItem("搜索栏(S)"); cbMenuItem.setMnemonic(KeyEvent.VK_S); submenu.add(cbMenuItem); menu.add(submenu); menu.addSeparator(); submenu=new JMenu("文字大小(X)"); submenu.setMnemonic(KeyEvent.VK_X); ButtonGroup group = new ButtonGroup(); rbMenuItem = new JRadioButtonMenuItem("大(L)"); rbMenuItem.setSelected(true); rbMenuItem.setMnemonic(KeyEvent.VK_L); group.add(rbMenuItem); submenu.add(rbMenuItem); rbMenuItem = new JRadioButtonMenuItem("中(M)"); rbMenuItem.setMnemonic(KeyEvent.VK_M); group.add(rbMenuItem); submenu.add(rbMenuItem); rbMenuItem = new JRadioButtonMenuItem("小(S)"); rbMenuItem.setMnemonic(KeyEvent.VK_S); group.add(rbMenuItem); submenu.add(rbMenuItem); menu.add(submenu); return menuBar; } public void run() { try { textArea.append(" 等待客户端连接"+"\n"); serverSocket = new ServerSocket(7658); socket=serverSocket.accept(); textArea.append("连接成功"+"\n"); BufferedReader in=new BufferedReader( new InputStreamReader(socket.getInputStream())); PrintWriter out=new PrintWriter( new OutputStreamWriter(socket.getOutputStream())); sender=new SenderButton(out); boolean done=false; while(true){ String str=in.readLine(); textArea.append("Client:"+str+"\n"); } } catch (Exception ex) { ex.printStackTrace(); } } public static void main(String[] args) { EchoServerTest test=new EchoServerTest(); } }

java中关于JScrollPane滚动面板插入文本域用到的方法，如setViewportView()

当JScrollPane中的View包含一个JLabel，如果这个JLabel很长，那么在一开始，水平滚动条是隐藏的。这时候，如果我们慢慢拖动窗口使JScrollPane变宽，那么View也变宽了（因为JLabel很长）。但是如果这时候拖动窗口使JScrollPane变窄，View的宽度没有变窄！水平滚动条出现了！我们期望的结果是，JScrollPane变窄的时候，JLabel也变窄。

50,527

社区成员

85,606

社区内容

发帖

与我相关

我的任务

javaspring bootspring cloud 技术论坛（原bbs）

社区管理员

加入社区

近7日
近30日
至今

加载中

查看更多榜单

社区公告

暂无公告

试试用AI创作助手写篇文章吧

+ 用AI写文章