急需一段java小程序

import javaawt;

import javaawtevent;

import javaxswing;

import javatextDateFormat;

import javaxswingevent;

import javaxswingtable;

import javaxswingtree;

import javaxswingfilechooser;

import javaio;

import javautil;

public class WinExplorer extends JFrame implements TreeSelectionListener{

JPanel contentPane=(JPanel)getContentPane();;

JMenuBar menuBar = new JMenuBar();

JMenu menuFile = new JMenu("文件");

JMenuItem menuItemExit = new JMenuItem("退出");

JToolBar toolBar = new JToolBar();

JButton bttUp = new JButton();

Icon iconUp=UIManagergetIcon("FileChooserupFolderIcon");

JLabel statusBar = new JLabel();

DetailTable detailTable = new DetailTable();

JScrollPane sp = new JScrollPane(detailTable);

JSplitPane split = new JSplitPane();

FileSystemView fileSystemView=FileSystemViewgetFileSystemView();

FileNode root=new FileNode(fileSystemViewgetRoots()[0]);

DefaultTreeModel treeModel=new DefaultTreeModel(root);

JTree tree = new JTree(treeModel);

public static void main(String argv[]){

try {

UIManagersetLookAndFeel(UIManagergetSystemLookAndFeelClassName());

Font font=new Font("宋体",FontPLAIN,12);

String names[]={"Label","CheckBox","PopupMenu","TextPane",

"MenuItem","CheckBoxMenuItem","JRadioButtonMenuItem",

"ComboBox","Button","Tree","ScrollPane","TabbedPane",

"EditorPane","TitledBorder","Menu","TextArea","OptionPane",

"MenuBar","ToolBar","ToggleButton","ToolTip","ProgressBar",

"TableHeader","Panel","List","ColorChooser","PasswordField",

"TextField","Table","Label","Viewport","RadioButtonMenuItem",

"RadioButton"};

for(int i=0;i<nameslength;i++)UIManagerput(names[i]+"font",font);

UIManagerput("Labelforeground",Colorblack);

UIManagerput("Borderforeground",Colorblack);

UIManagerput("TitledBordertitleColor",Colorblack);

new WinExplorer()show();

}catch(Exception e){

eprintStackTrace();

}

}

public WinExplorer() {

contentPanesetLayout(new BorderLayout());

Dimension dimension = getToolkit()getScreenSize();

int i = (dimensionwidth - 640) / 2;

int j = (dimensionheight - 480) / 2;

setBounds(i,j,640,480);

setTitle("资源管理器");

setDefaultCloseOperation(JFrameEXIT_ON_CLOSE);

setJMenuBar(menuBar);

statusBarsetText(" ");

menuItemExitaddActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {Systemexit(0);}

});

bttUpsetIcon(iconUp);

bttUpaddActionListener(new javaawteventActionListener() {

public void actionPerformed(ActionEvent e) {

try{

TreePath upPath=treegetSelectionPath()getParentPath();

if(upPath!=null){

treesetSelectionPath(upPath);

treescrollPathToVisible(upPath);

}

}catch(Exception ex){}

}

});

splitsetDividerSize(6);

splitsetLeftComponent(new JScrollPane(tree));

splitsetRightComponent(sp);

splitsetDividerLocation(180);

spgetViewport()setBackground(Colorwhite);

menuFileadd(menuItemExit);

menuBaradd(menuFile);

contentPaneadd(toolBar, BorderLayoutNORTH);

toolBaradd(bttUp, null);

contentPaneadd(statusBar, BorderLayoutSOUTH);

contentPaneadd(split, BorderLayoutCENTER);

treeaddTreeExpansionListener(new MyExpandsionListener());

treesetCellRenderer(new MyTreeCellRenderer());

treeaddTreeSelectionListener(this);

treesetSelectionRow(0);

treesetComponentOrientation(ComponentOrientationUNKNOWN);

}

public void valueChanged(TreeSelectionEvent e){

Object obj=treegetLastSelectedPathComponent();

if(obj==null)return;

else detailTablesetParent(((FileNode)obj)getFile());

}

class MyTreeCellRenderer extends DefaultTreeCellRenderer {

public MyTreeCellRenderer() {}

public Component getTreeCellRendererComponent(JTree tree,Object value,

boolean sel,boolean expanded,boolean leaf,int row,boolean hasFocus) {

supergetTreeCellRendererComponent(tree,value,sel,expanded,leaf,row,hasFocus);

setIcon(fileSystemViewgetSystemIcon(((FileNode)value)getFile()));

return this;

}

}

class MyExpandsionListener implements TreeExpansionListener {

public MyExpandsionListener() {}

public void treeExpanded(TreeExpansionEvent event) {

if(eventgetPath() == null){

return;

}

treesetCursor(new Cursor(CursorWAIT_CURSOR));

TreePath path = eventgetPath();

FileNode node = (FileNode)pathgetLastPathComponent();

nodeexplore();

treeModelnodeStructureChanged(node);

treesetCursor(new Cursor(CursorDEFAULT_CURSOR));

}

public void treeCollapsed(TreeExpansionEvent event) {}

}

class FileNode extends DefaultMutableTreeNode {

private boolean explored = false;

public FileNode(File file) { setUserObject(file); }

public boolean getAllowsChildren() { return isDirectory(); }

public boolean isLeaf() { return !isDirectory();}

public File getFile() { return (File)getUserObject(); }

public boolean isExplored() { return explored; }

public void setExplored(boolean b){ explored=b;}

public boolean isDirectory() { return getFile()isDirectory();}

public String toString() {

File file = (File)getUserObject();

String filename = filetoString();

int index = filenamelastIndexOf(Fileseparator);

return (index != -1 && index != filenamelength()-1)

filenamesubstring(index+1) : filename;

}

public void explore() {

if(!isExplored()) {

File file = getFile();

File[] children = filelistFiles();

if(children==null||childrenlength==0)return;

for(int i=0; i < childrenlength; ++i)

{

File f=children[i];

if(fisDirectory())add(new FileNode(children[i]));

}

explored = true;

}

}

}

class DetailTable extends JTable{

DetailTableModel model=new DetailTableModel();

public DetailTable(){

setModel(model);

setShowGrid(false);

TableColumnModel colModel = getColumnModel();

for (int i=0;i<3;i++)

colModelgetColumn(i)setCellRenderer(new DetailsTableCellRenderer());

setRowHeight(18);

thisaddMouseListener(new MouseAdapter(){

public void mouseClicked(MouseEvent e) {

if(egetClickCount()==2){

for (int i = 0; i <getRowCount(); i++) {

if(getCellRect(i,0,true)contains(egetPoint())){

openSelect();

break;

}

}

}

}

});

}

public void openSelect(){

Object obj=modelgetValueAt(getSelectedRow(),0);

if(obj==null)return;

File f=(File)obj;

if(fisDirectory()){

//expand tree

}else{

//open select file

}

}

public void setParent(File parent){

modelremoveAllRows();

File list[]=parentlistFiles();

if(list==null)return;

Vector vDir=new Vector(),vFile=new Vector();

for (int i = 0; i < listlength; i++) {

if(list[i]isDirectory())vDiradd(list[i]);

else vFileadd(list[i]);

}

sortElements(vFile);

sortElements(vDir);

for (int i = 0; i < vDirsize(); i++)modeladdFile((File)vDirelementAt(i));

for (int i = 0; i < vFilesize(); i++)modeladdFile((File)vFileelementAt(i));

}

public void sortElements(Vector v)

{

for(int i=0;i<vsize();i++)

{

int k=i;

for(int j=i+1;j<vsize();j++){

File fa=(File)velementAt(j);

File fb=(File)velementAt(k);

if(fileSystemViewgetSystemDisplayName(fa)toLowerCase()compareTo(

fileSystemViewgetSystemDisplayName(fb)toLowerCase())<0)k=j;

}

if(k!=i)swap(k,i,v);

}

}

private void swap(int loc1,int loc2,Vector v){

Object tmp=velementAt(loc1);

vsetElementAt(velementAt(loc2),loc1);

vsetElementAt(tmp,loc2);

}

class DetailTableModel extends DefaultTableModel {

public DetailTableModel() {

addColumn("名称");

addColumn("大小");

addColumn("修改时间");

}

public void addFile(File f){

addRow(new Object[]{f,new Double(flength()/1024),

new javasqlDate(flastModified())});

}

public void removeAllRows(){

while(getRowCount()!=0) removeRow(0);

}

public boolean isCellEditable(int row, int column) {return false;}

}

class DetailsTableCellRenderer extends DefaultTableCellRenderer {

DetailsTableCellRenderer() {}

public Component getTableCellRendererComponent(JTable table, Object value,

boolean isSelected, boolean hasFocus, int row, int column) {

if (column == 1){

setHorizontalAlignment(SwingConstantsTRAILING);

isSelected=hasFocus=false;

}else if(column==2){

setHorizontalAlignment(SwingConstantsCENTER);

isSelected=hasFocus=false;

}else setHorizontalAlignment(SwingConstantsLEADING);

return supergetTableCellRendererComponent(

table, value, isSelected, hasFocus, row, column);

}

public void setValue(Object value) {

setIcon(null);

if (value instanceof File) {

File file = (File)value;

setText(fileSystemViewgetSystemDisplayName(file));

setIcon(fileSystemViewgetSystemIcon(file));

}else{

supersetValue(value);

}

}

}

}

}

你双击左面的桌面图标就可以浏览了，别双击字。

给你一个简单的实现吧，注意一定要先运行MyServerjava

//MyCilentjava

import javaio;

import javanet;

import javaxswing;

import javaawt;

import javaawtevent;

public class MyClient extends JFrame implements ActionListener{

JTextField tf;

JTextArea tx;

JButton bt;

PrintWriter out;

public MyClient(){

tf=new JTextField(20);

tx=new JTextArea();

txsetLineWrap(true);

txsetWrapStyleWord(true);

JPanel pan=new JPanel();

JScrollPane jsp=new JScrollPane(tx);

add(jsp,"Center");

bt=new JButton("SEND");

btaddActionListener(this);

panadd(tf);

panadd(bt);

add(pan,"South");

thisaddWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

Systemexit(0);

}

});

setTitle("THE CLIENT");

setSize(400,300);

setVisible(true);

try{

Socket socket=new Socket("127001",1680);

out=new PrintWriter(socketgetOutputStream(),true);

InputStreamReader in = new InputStreamReader(socketgetInputStream());

BufferedReader sin=new BufferedReader(in);

String s;

while(true){

s=sinreadLine();

txappend("#Server Said#: "+s+"\n");

}

}catch(Exception e){

eprintStackTrace();

}

}

public void actionPerformed(ActionEvent e){

if(egetSource()==bt){

txappend("@Client Said@: "+tfgetText()+"\n");

outprintln(tfgetText());

tfsetText("");

}

}

public static void main(String[] args){

MyClient mct = new MyClient();

}

}

//MyServerjava

import javaio;

import javanet;

import javaxswing;

import javaawt;

import javaawtevent;

public class MyServer extends JFrame implements ActionListener{

JTextField tf;

JTextArea tx;

JButton bt;

JScrollPane jsp;

JPanel pan;

PrintWriter out;

public MyServer(){

tx=new JTextArea();

txsetLineWrap(true);

txsetWrapStyleWord(true);

jsp=new JScrollPane(tx);

tf=new JTextField(20);

bt=new JButton("SEND");

btaddActionListener(this);

pan=new JPanel();

panadd(tf);

panadd(bt);

add(pan,"South");

add(jsp,"Center");

thisaddWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

Systemexit(0);

}

});

setTitle("THE SERVER");

setSize(400,300);

setVisible(true);

try{

ServerSocket server = new ServerSocket(1680);

Socket socket = serveraccept();

InputStreamReader in = new InputStreamReader(socketgetInputStream());

BufferedReader sin=new BufferedReader(in);

out=new PrintWriter(socketgetOutputStream(),true);

while(true){

String s=sinreadLine();

txappend("@Client Said@: "+s+"\n");

}

}catch(Exception e){

eprintStackTrace();

}

}

public void actionPerformed(ActionEvent e){

if(egetSource()==bt){

String st = tfgetText();

txappend("#Server Said#: "+st+"\n");

outprintln(st);

tfsetText("");

}

}

public static void main(String[] args){

MyServer msr = new MyServer();

}

}

你放在桌面不好管理。

建议你在D盘建一个文件夹。比如D:/java 把你写的JAVA源文件放在里面。

然后点“开始”--“运行”--输入CMD进入DOS里面。

但是里面默认的是C盘。必须转到D盘中的java文件夹。方法如下：

cd/d d:/java

然后编译:javac HelloWorldjava

如果没错就运行：java HelloWorld

具体代码如下：

import javaxswing;

import javaawtevent;

import javaawt;

public class Calculator  extends JFrame implements ActionListener  {

private JFrame jf;

private JButton[] allButtons;

private JButton clearButton;

private JTextField jtf;

public Calculator() {

//对图形组件实例化

jf=new JFrame("任静的计算器10：JAVA版");

jfaddWindowListener(new WindowAdapter(){

public void windowClosing(){

Systemexit(0);

}

});

allButtons=new JButton[16];

clearButton=new JButton("清除");

jtf=new JTextField(25);

jtfsetEditable(false);

String str="123+456-7890=/";

for(int i=0;i<allButtonslength;i++){

allButtons[i]=new JButton(strsubstring(i,i+1));

}

}

public void init(){

//完成布局

jfsetLayout(new BorderLayout());

JPanel northPanel=new JPanel();

JPanel centerPanel=new JPanel();

JPanel southPanel=new JPanel();

northPanelsetLayout(new FlowLayout());

centerPanelsetLayout(new GridLayout(4,4));

southPanelsetLayout(new FlowLayout());

northPaneladd(jtf);

for(int i=0;i<16;i++){

centerPaneladd(allButtons[i]);

}

southPaneladd(clearButton);

jfadd(northPanel,BorderLayoutNORTH);

jfadd(centerPanel,BorderLayoutCENTER);

jfadd(southPanel,BorderLayoutSOUTH);

addEventHandler();

}

//添加事件监听

public void addEventHandler(){

jtfaddActionListener(this);

for(int i=0;i<allButtonslength;i++){

allButtons[i]addActionListener(this);

}

clearButtonaddActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

CalculatorthisjtfsetText("");

}

});

}

//事件处理

public void actionPerformed(ActionEvent e) {

//在这里完成事件处理  使计算器可以运行

String action=egetActionCommand();

if(action=="+"||action=="-"||action==""||action=="/"){

}

}

public void setFontAndColor(){

Font f=new Font("宋体",FontBOLD,24);

jtfsetFont(f);

jtfsetBackground(new Color(0x8f,0xa0,0xfb));

for(int i=0;i<16;i++){

allButtons[i]setFont(f);

allButtons[i]setForeground(ColorRED);

}

}

public void showMe(){

init();

setFontAndColor();

jfpack();

jfsetVisible(true);

jfsetDefaultCloseOperation(JFrameEXIT_ON_CLOSE);

}

public static void main(String[] args){

new Calculator()showMe();

}

}

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