【-IT技术报道】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 _disibledevent="center">