《Java编程思想》读书笔记（10）

packagecom.vitamin.UI;
importjavax.swing. * ;
importjavax.swing.filechooser.FileFilter;

importjava.awt.BorderLayout;
importjava.awt.Container;
importjava.awt.GridLayout;
importjava.awt. event . * ;
importjava.io.File;
importjava.io.FileWriter;
importjava.io.IOException;

importcom.vitamin.Console. * ;

public class FileTestextendsJFrame
{
privateJButtonbtnOpen=newJButton("Open");
privateJButtonbtnSave=newJButton("Save");
privateJPanelp=null;
privateJTextFieldtfDir=newJTextField();
privateJTextFieldtfFileName=newJTextField();
privateJScrollPanesp=newJScrollPane();
privateJEditorPaneep=newJEditorPane();
privateFilefile=null;

publicFileTest()
{
super();
//TODOAuto-generatedconstructorstub
this.initForm();
}

publicvoidinitForm()
{
Containercon=this.getContentPane();
con.setLayout(newBorderLayout());
this.tfDir.setEditable(false);
this.tfFileName.setEditable(false);
this.btnSave.setEnabled(false);

this.btnOpen.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente)
{
JFileChooserfc=newJFileChooser();
fc.setFileFilter(newTextFileFilter());
intreturnVal=fc.showOpenDialog(FileTest.this);
if(returnVal==JFileChooser.APPROVE_OPTION)
{
file=fc.getSelectedFile();
try
{
ep.setPage(file.toURL());
tfFileName.setText(file.getAbsolutePath());
btnSave.setEnabled(true);
}
catch(IOExceptionex)
{
thrownewRuntimeException(ex);
}

}
elseif(returnVal==JFileChooser.CANCEL_OPTION)
{
tfFileName.setText("你已经取消了文件的选择");
}
}
});

this.btnSave.addActionListener(newActionListener(){
publicvoidactionPerformed(ActionEvente)
{
try{
FileWriterfw=newFileWriter(file);
ep.write(fw);
JOptionPane.showMessageDialog(FileTest.this,"保存成功");
}catch(IOExceptionioe){
thrownewRuntimeException(ioe);
}
}
});
sp.getViewport().add(ep);

p=newJPanel();
p.add(this.btnOpen);
p.add(this.btnSave);
con.add(p,BorderLayout.SOUTH);
con.add(sp,BorderLayout.CENTER);
p=newJPanel();
p.setLayout(newGridLayout(2,1));
p.add(this.tfDir);
p.add(this.tfFileName);
con.add(p,BorderLayout.NORTH);
console.run(this,400,400);
}
publicclassTextFileFilterextends
javax.swing.filechooser.FileFilter{
publicbooleanaccept(Filef){
returnf.getName().endsWith(".txt")
||f.isDirectory();
}
publicStringgetDescription(){
return"TextFiles(*.txt)";
}
}
/**//**
*@paramargs
*/
publicstaticvoidmain(String[]args)
{
FileTestft=newFileTest();

}

}

做了个读写文件的小东西，功能很烂，有时间做个完整的记事本吧。