6-5.txt

java入门的几个代码,很实用,初学者不可错过

package CopyFile;
import java.awt.*;
import java.awt.event.*;
import borland.jbcl.layout.*;
import borland.jbcl.control.*; 
import.java.io.*;
import.java.util.*;
public class MainFrame extends Frame {
  TextField textFedle1=new textField();
  Bubtton button1=new Button();
  Label labell=new Label();
  Label labe12=new Label();
  TextField textField2=new TextField();
  Button button2=new Button();
  Button button3=new Button(); 
   Filer filer1=new Filer(″选择源文件″，Filer.LOAD);
  Filer filer2=new Filer(this,″选择目的文件″，    Filer.SAVE);
  Button button4=new Button();
  PrepareCopyFile  pCopyFile=null; 
  Labe label3=new Label();
  Panel panel=new Pane();
  Panel panel1=new Panel();
  PaneLayout paneLayout1=new PaneLayout();
  PaneLayout paneLayout2=new PaneLayout();
  GroupBox groupBox1=new GroupBox();
  List list1=new List();
  PaneLayout paneLayout3=new PaneLayout(); 
  Public MainFrame()
  {
  try{
   jbInit();
  }
 catch (Exception e) {
 e.printStackTrace();
 }
}
 private void jbInit() thows Excption  { 
this.setSize(new Dimension(454.154));
this.setBackgrond(new Color(192,192,192));
button1.setLabl(″浏览．．．″)
btton.addActionListener(new MainFrame_button1_actionAdapter(this)); 
Btton.addActionListener(new MainFrame_button1_actionAdapter(this)); 
labell.setAlignment(2); 
labell.setText(″源文件″)；
labell.setAlignment(2);
label2.setText(“目的文件″)；
button2.setLabel(″复制″)；
button2.addActionListener(new MainFrame_button2_actionAdapter(this));
button3.setLabel(″退出″)；
button3.addActionListener(new MainFrame_button3_actionAdapter(this));
button4.setLabel(″浏览．．．″)；
button4.addActionListener(new MainFrame_button4_actionAdqapter(this));
label3.setText(“请输入选择源文件(夹)和目标文件(夹):”)；
groupBox1.setLayout(paneLayout3);
groupBox1.setLabele(″下载队列″)；
panel1.setLayout(paneLayout2);
this.setLayout(paneLayout1);
this.add(pane11,new PaneConstraint 
(″panell″, ″panell″,PaneConstraints.ROOT,0.5f)); 
panel.add(groupBox1. , new PaneConstraints 
(“groutpBox1”,“groupBox1”,PaneConstraints.ROOT,1.0f)); 
GroupBo1.add(list1, new PaneConstraints 
(“list”,“listl”,PaneConstraint.ROOT,1.0f)); 
this.add(labe13,   new   PaneConstraint 
(“label3”, “panell”,PaneConstraints.LEET,0.6300448f));
this.add(labell. ,new PaneConstraint 
(“labell”,“label3”,PaneConstraints.BOTTOM,0.68589747f))this.add(textFieldl,new PaneConstraint 
(“label2”,“labell”,PaneConstraints.BOTTOM,0.6730769f)) 
this.add(textField,new PaneConstrains 
(“textField1”,“labell”,PaneConstraints.RIGHT,0.76868325f)) 
this.add(buttonl,new PaneConstraints 
(“buttonl”,“textFieldl”,PaneConstraints.RIGHT,0.3442623f)); 
this.add(button2,new PaneConstraints 
(“button2”,“label2”,PaneConstraints,BOTTOM,0.57142854f)); 
this.add(textField2,new PaneConstraints 
(“textField2”,“Label2”,PaneConstraints.RIGHT,0.76868325f)); 
this.add(button4,new PaneConstraints 
(“button4”,“textFileld2”,PaneConstraints.RIGHT,0.3442623f)); 
this.add(button3,new PaneConstraints 
(“button3”,“button2”,PaneConstraints.RIGHT,0.4798851f)); 
} 
public static  void main(String[] args)  {
   MainFrame frame=new MainFrame();
   frame.setLocation(200.200);
   frame.setSize(450,150)l
   frame.show();
   } 
void buttonl_actionPerformed(ActionEvent e)  {
filerl.show();
String dir=feler1.getDirectory();
String file=feler1.getFile();
if(dir.equals(″null″)&&file.equals(″null″)return;
textField1.setText(dir+file);
} 
void button2_actionPerformed(ActionEvent e)  {
String  sourceName=textFileld.getText();
String  desName=textField2.getText();
if(sourceName.equals(′′′′)‖desName.equals(′′′′)return;
pCopyFile=new PrepareCopyFile(this,sourceName,desName);
pCopyFile.stary();
}
void addCopyingFile(String sname) {
File file=new File(same);
String sfilename=file.getName();
list1.addItem(sfilename);
}
void removeCopyingFile(String sname) {
File file=new File(sname);
String sfilename=file.getName();
}
void button3_actionPerformed(ActionEvent e) {
MessageDialog mdlg=new MessageDialog(this,“警告”，确定要退出吗?”,6)； 
mdlg.setSize(150,80);
mdlg.show();
if(mdlg.getResult()= =MessageDialog.No)
return;
System.exit(0);
}
void button4_actionPerformed(ActionEvent e) {
filer2.show();
String dir=filer2.getDirectory();
String file=filer2.getFile();
if(dir.equals(″null″)&&file.equals(″null″))return;
textField2.setText(dir+file);
}
}