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作者:cctech 我实际工作中的经验教训，在这里与大家共享， 空的字符串是””,不带空格 outputStream 在打印时,打印的内容后面不要加\n,否则对方接受和判断不正确 G:\PROJECTION\IC2N\1c2njava>javac Jsubnetframe.java Jsubnetframe.java:22: Jsubnetframe should be declared abstract; it does not defi ne valueChanged(javax.swing.event.ListSelectionEvent) in Jsubnetframe public class Jsubnetframe extends JFrame implements ListSelectionListener { ^ Jsubnetframe.java:68: cannot resolve symbol symbol : class TableModel location: class Jsubnetframe TableModel dataModel = new AbstractTableModel() { ^ Jsubnetframe.java:68: cannot resolve symbol symbol : class AbstractTableModel location: class Jsubnetframe TableModel dataModel = new AbstractTableModel() { ^ Jsubnetframe.java:89: addActionListener(java.awt.event.ActionListener) in javax. swing.AbstractButton cannot be applied to (Jsubnetframe) cancelb.addActionListener(this); ^ Note: Jsubnetframe.java uses or overrides a deprecated API. Note: Recompile with -deprecation for details. 4 errors 原因是没有import javax.swing.table.*; G:\PROJECTION\IC2N\1c2njava>javac Jhpportframe.java Jhpportframe.java:27: Jhpportframe should be declared abstract; it does not defi ne mousePressed(java.awt.event.MouseEvent) in Jhpportframe public class Jhpportframe extends JFrame implements ^ Note: Jhpportframe.java uses or overrides a deprecated API. Note: Recompile with -deprecation for details. 1 error Jhpportframe should be declared abstract; it does not defi 原因是因为在这里必须用MouseListener 的相关方法进行覆盖,也就是说必须加入如下的方法: public void mousePressed(MouseEvent evt) {//if (audio != null) audio.play();} public void mouseEntered (MouseEvent me) {} public void mouseExited (MouseEvent me) {} public void mouseReleased(MouseEvent me) {} 鼠标左键和右件的事件获取: public void mousePressed(MouseEvent evt) { Point point1=evt.getPoint(); int x,y; int onmask = evt.BUTTON1_DOWN_MASK;//左键的ID号 if ((evt.getModifiersEx() & onmask ) == onmask) // 点击左键时 { } else //点击右键时 抽象类,不能进行初始化或者生成实例 hpportimg=new Image(getDocumentBase(),”aaa.gif”); 这句话是错的,因为Image()是抽象类,不能进行初始化或者生成实例.,应该用: hpportimg=getImage(“adf.gif”); 并且应该注意它不能放在构造函数中,而应该放在INIT()等方法中. 各种动作和事件的处理: 监视键盘的动作,用usertf.addKeyListener(this);它的接口软件包是KeyListener,应该import java.awt.event.*; 必须重载的接口函数是 public void keyPressed(KeyEvent e){} public void keyReleased(KeyEvent e){} public void keyTyped(KeyEvent e){} 监视焦点的动作,用usertf.add FocusListener (this);它的接口软件包是FocusListener应该import java.awt.event.*; 必须重载的接口函数是 public void focusLost(FocusEvent e) { } public void focusGained(FocusEvent e) {} 监视鼠标的动作,用usertf.addMouseListener(this);它的接口软件包是MouseyListener,应该import java.awt.event.*; //必须增加MouseListener(this) 或component. MouseListener(this) 必须重载的接口函数是 public void mouseClicked(MouseEvent e){ } public void mousePressed(MouseEvent evt) {} public void mouseEntered (MouseEvent me) {} public void mouseExited (MouseEvent me) {} public void mouseReleased(MouseEvent me) {} 监视鼠标移动的动作,用usertf.addMouseListener(this);它的接口软件包是MouseyMotionListener,应该import java.awt.event.*; 必须重载的接口函数是 public void mouseMoved(MouseEvent e){} public void mouseDragged(MouseEvent e){ } 以上各种事件必须在组件上增加相应的侦听,如 user.addKeyListener(this); pass.addKeyListener(this); user.addFocusListener(this); pass.addFocusListener(this); 按钮事件的执行在JAVA2中应该用下列函数，无须重载: public void actionPerformed(ActionEvent ae) { JButton source=(JButton)ae.getSource(); if(source==okb) { slkdfjalskdjflaksdjlfjads;flkjasld;kjfl;kasjdfl;k} 焦点事件:focusLost(),focusGain() transferFocus()是将焦点传递到下一个组件 requestFocus()是将焦点传递到指定的组件, if(e.getComponent()==user) user.transferFocus(); else if(e.getComponent()==pass) pass.transferFocus(); else if(e.getComponent()==ok) ok.transferFocus(); 经过观察发现,焦点可以在文本框上传递,但是在按钮上好象没法传递. 在表格中 subnettable.reshape(0,0,300,200); //一定要,用以刷新屏幕 JTable中的每一行可否设置不同的背景颜色？？？ 可以的,使用自己的TableCellRenderer从TableModel中的value获取颜色值. 请参见: http://www2.gol.com/users/tame/swing/examples/ 有关玻璃层: 1、 GLASSPANE不能设置大小，它将布满整个工作区， //jtv.reshape(300,300,300,200); 没用 2、 先建立一个JComponent 的组件，jtv=new Jtopview(jlp);其中jlp是新建母窗口的JLayeredPane 3、 将这个组建用setGlassPane(jtv)方法设置 4、 如果要求它透明，这一句不能少jtv.setOpaque(false); 5、 这一句是显示的，也不能少jtv.setVisible(true); 6、 玻璃层下面层的组建获取动作用redispatchMouseEvent（MouseEvent me） 这段代码是我在英文网址上拿下来修改的,同时参照了<<精通JAVA2>>P437页 public void redispatchMouseEvent(MouseEvent me,boolean repaint) { //能够直接取到的组件,用广义的component 就可以了 Point point=me.getPoint(); int eventID = me.getID(); Component component=jlp.getComponentAt(point); Point componentPoint = SwingUtilities.convertPoint( jlp, point, component); boolean componentBOOL=component.contains(componentPoint ); if(componentBOOL){ //System.out.println("7777777777777777"+component); component.dispatchEvent(new MouseEvent(component,eventID,me.getWhen(),me.getModifiers(), componentPoint.x,componentPoint.y,me.getClickCount(),me.isPopupTrigger())); } ////不能够直接取到的组件,用具体的组件名字 Point alarmtablePoint = SwingUtilities.convertPoint( jlp, point, alarmtable); boolean alarmtableBOOL= alarmtable.contains(alarmtablePoint ); if (alarmtableBOOL ) { alarmtable.dispatchEvent(new MouseEvent(alarmtable, eventID, me.getWhen(), me.getModifiers(), alarmtablePoint.x, alarmtablePoint.y, me.getClickCount(), me.isPopupTrigger())); } } jiangns3003兄弟还告诉了以下的方法：兄弟，你的这个方案太复杂了。你的目的是：glasspane显示，但不想处理事件（这时事件将自动 |