如何将下载的java源代码导入到myeclipse中运行

1.首先新建一个文件夹，如c:\\myWorkspace

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2.然后在myWorkspace中再新建一个文件夹，名为你的项目名

3.如myProject，然后把你的源代码放到myProject中。

那么现在有文件目录如下

c:\myWorkspace\myProject\src

c:\myWorkspace\myProject\bin

c:\myWorkspace\myProject\build

等等。

4.如果你导入的源代码原本就是一个工程，那么2和3可以省略，直接把工程放到myWorkspace下

如c:\myWorkspace\SomeProject

5打开myeclipse 选择工作空间(workspace)为myWorkspace

6.点击导航栏 "File"-"New"-"Java Project"

7.选择"create project from existing source"，并点击"Browse"

8.到C盘下选择myProject

9."Project Name" 必须填写与你的工程文件夹名一致。如myProject

10 点击"Finish"完成

build放的应该是编译后的.class文件

db放的应该是数据库现相关的文件

res放的是其他资源

src放的是.java源文件

如何将下载的java源代码导入到eclipse中运行

eclipse打开并运行一个已经写好的java文件步骤如下：

1、新建一个java工程项目：右键Eclipse的PackageExplorer空白部分，点击New，再点击JavaProject，输入工程名，点击finish；

2、在新建的工程里新建一个类：右键工程，点击New，再点击Class，输入类名，点击finish；

3、把写好的java文件的代码复制到新建的类中；

4、右键新建的类文件，点击RunAs，再点击JavaApplication即可运行Java文件。

需要注意的是：java文件要成功运行，前提是要有主方法（main）的存在，没有主方法没办法运行java程序。

网上下载的java代码怎么运行？

如果是runnable的jar，直接双击就可以运行

如果是源码，导入到eclipse里编译运行

求一个JAVA单线程下载器的代码

import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.Shell;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.SWT;

import org.eclipse.swt.widgets.ProgressBar;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

public class DownloadApp {

protected Shell shell;

private ProgressBar progressBar;

int CurrentPosition = 0;

private Label label;

public static void main(String[] args) {

try {

DownloadApp window = new DownloadApp();

window.open();

} catch (Exception e) {

e.printStackTrace();

}

}

/**

 * Open the window.

 */

public void open() {

Display display = Display.getDefault();

createContents();

shell.open();

shell.layout();

while (!shell.isDisposed()) {

if (!display.readAndDispatch()) {

display.sleep();

}

}

}

/**

 * Create contents of the window.

 */

protected void createContents() {

shell = new Shell();

shell.setSize(450, 177);

shell.setText("\u6A21\u62DF\u4E0B\u8F7D\u7A0B\u5E8F");

label = new Label(shell, SWT.NONE);

label.setBounds(32, 32, 110, 17);

progressBar = new ProgressBar(shell, SWT.NONE);

progressBar.setBounds(32, 55, 360, 17);

Button button = new Button(shell, SWT.NONE);

button.addSelectionListener(new SelectionAdapter() {

public void widgetSelected(SelectionEvent e) {

label.setText("开始下载");

Thread wt = new Thread(new MyTask());

wt.start();

}

});

button.setBounds(312, 89, 80, 27);

button.setText("\u5F00\u59CB\u4E0B\u8F7D");

}

class MyTask implements Runnable {

public void run() {

while(true) {

CurrentPosition++;

if(CurrentPosition  100)

break;

Display.getDefault().asyncExec(new Runnable() {

public void run() {

progressBar.setSelection(CurrentPosition);

label.setText("当前进度..." + CurrentPosition + "%");

if(CurrentPosition = 100)

label.setText("下载完成");

}

});

try {

Thread.sleep(100);

} catch(InterruptedException e1) {

e1.printStackTrace();

}

}

}

}

}

求一个Java实现自动下载的源代码

您好，这样的：

/**

*

*/

package com.b510.base.bean.install;

import java.io.File;

import java.io.FileWriter;

import java.text.SimpleDateFormat;

import java.util.Date;

/**

* @author hongten(hongtenzone@foxmail.com)

* @date 2013-2-24

*/

@SuppressWarnings("unchecked")

public class BeanUtils {

//公共部分

private static final String RT_1 = "\r\n";

private static final String RT_2 = RT_1+RT_1;

private static final String BLANK_1 =" ";

private static final String BLANK_4 =" ";

private static final String BLANK_8 =BLANK_4 + BLANK_4;

//注释部分

private static final String ANNOTATION_AUTHOR_PARAMTER = "@author ";

private static final String ANNOTATION_AUTHOR_NAME = "hongten(hongtenzone@foxmail.com)";

private static final String ANNOTATION_AUTHOR = ANNOTATION_AUTHOR_PARAMTER + ANNOTATION_AUTHOR_NAME;

private static final String ANNOTATION_DATE = "@date ";

private static final String ANNOTATION = "/**"+RT_1+BLANK_1+"*"+BLANK_1+ANNOTATION_AUTHOR +RT_1+BLANK_1+"*"+BLANK_1+ANNOTATION_DATE +getDate()+RT_1+BLANK_1+"*/"+RT_1;

//文件 地址

//private static final String BEAN_PATH = "com/b510/base/bean";

private static final String DAO_PATH = "com/b510/base/dao";

private static final String DAO_IMPL_PATH = "com/b510/base/dao/impl";

private static final String SERVICE_PATH = "com/b510/base/service";

private static final String SERVICE_IMPL_PATH = "com/b510/base/service/impl";

//包名

private static final String BEAN_URL = "com.b510.base.bean";

private static final String DAO_URL = "com.b510.base.dao";

private static final String DAO_IMPL_URL = "com.b510.base.dao.impl";

private static final String SERVICE_URL = "com.b510.base.service";

private static final String SERVICE_IMPL_URL = "com.b510.base.service.impl";

//基本类名称

private static final String BASE_DAO_NAME = DAO_URL + ".BaseDao";

private static final String ABSTRACT_BASE_DAO_IMPL_NAME = DAO_IMPL_URL + ".AbstractBaseDaoImpl";

private static final String BASE_SERVICE_NAME = SERVICE_URL + ".BaseService";

private static final String ABSTRACT_BASE_SERVICE_IMPL_NAME = SERVICE_IMPL_URL + ".AbstractBaseServiceImpl";

/**

* 创建bean的Daobr

*

* @param c

* @throws Exception

*/

public void createBeanDao(Class c) throws Exception {

String cName = c.getName();

String fileName = System.getProperty("user.dir") + "/src/" + DAO_PATH

+ "/" + getLastChar(cName) + "Dao.java";

File f = new File(fileName);

FileWriter fw = new FileWriter(f);

fw.write("package "+DAO_URL+";"+RT_2+ANNOTATION+"public interface " +

getLastChar(cName) + "Dao extends "+BASE_DAO_NAME+" " + cName + " {"+RT_2+"}");

fw.flush();

fw.close();

showInfo(fileName);

}

/**

* 创建bean的Dao的实现类

* @param c

* @throws Exception

*/

public void createBeanDaoImpl(Class c) throws Exception{

String cName = c.getName();

String fileName = System.getProperty("user.dir") + "/src/" + DAO_IMPL_PATH

+ "/" + getLastChar(cName) + "DaoImpl.java";

File f = new File(fileName);

FileWriter fw = new FileWriter(f);

fw.write("package "+DAO_IMPL_URL+";"+RT_2+ANNOTATION+"public class " +

getLastChar(cName) + "DaoImpl extends "+ABSTRACT_BASE_DAO_IMPL_NAME+"" +

cName + " implements "+DAO_URL+"."+getLastChar(cName)+"Dao{"+RT_2+"}");

fw.flush();

fw.close();

showInfo(fileName);

}

/**

* 创建bean的service

* @param c

* @throws Exception

*/

public void createBeanService(Class c) throws Exception{

String cName = c.getName();

String fileName = System.getProperty("user.dir") + "/src/" + SERVICE_PATH

+ "/" + getLastChar(cName) + "Service.java";

File f = new File(fileName);

FileWriter fw = new FileWriter(f);

fw.write("package "+SERVICE_URL+";"+RT_2+ANNOTATION+"public interface " +

getLastChar(cName) + "Service extends "+BASE_SERVICE_NAME+""+ cName +"{"+RT_2+"}");

fw.flush();

fw.close();

showInfo(fileName);

}

/**

* 创建bean的service的实现类

* @param c

* @throws Exception

*/

public void createBeanServiceImpl(Class c) throws Exception{

String cName = c.getName();

String fileName = System.getProperty("user.dir") + "/src/" + SERVICE_IMPL_PATH

+ "/" +getLastChar(cName)+"ServiceImpl.java";

File f = new File(fileName);

FileWriter fw = new FileWriter(f);

fw.write("package "+SERVICE_IMPL_URL+";"+RT_2+ANNOTATION+"public class "

+ getLastChar(cName) + "ServiceImpl extends "+ABSTRACT_BASE_SERVICE_IMPL_NAME+""+ cName

+ " implements "+SERVICE_URL+"."+getLastChar(cName)+"Service{"+RT_2+BLANK_4

+"private "+DAO_URL+"."+getLastChar(cName)+"Dao "+getLowercaseChar(getLastChar(cName))

+"Dao;"+RT_2+BLANK_4+"public void set"+getLastChar(cName)+"Dao("+DAO_URL+"."+getLastChar(cName)+"Dao "

+getLowercaseChar(getLastChar(cName))+"Dao){"+RT_1+BLANK_8+"this."+getLowercaseChar(getLastChar(cName))+"Dao = "

+getLowercaseChar(getLastChar(cName))+"Dao;"+RT_1+BLANK_4+"}"+RT_2+BLANK_4+"@Override"+RT_1+BLANK_4

+"public "+DAO_URL+"."+"BaseDao"+BEAN_URL+"."+getLastChar(cName)+" getBaseDao(){"+RT_1+BLANK_8

+"return "+getLowercaseChar(getLastChar(cName))+"Dao;"+RT_1+BLANK_4+"}"+RT_2+"}");

fw.flush();

fw.close();

showInfo(fileName);

}

/**

* 获取路径的最后面字符串br

* 如：br

* codestr = "com.b510.base.bean.User"/codebr

* code return "User";code

* @param str

* @return

*/

public String getLastChar(String str) {

if ((str != null) (str.length() 0)) {

int dot = str.lastIndexOf('.');

if ((dot -1) (dot (str.length() - 1))) {

return str.substring(dot + 1);

}

}

return str;

}

/**

* 把第一个字母变为小写br

* 如：br

* codestr = "UserDao";/codebr

* codereturn "userDao";/code

* @param str

* @return

*/

public String getLowercaseChar(String str){

return str.substring(0,1).toLowerCase()+str.substring(1);

}

/**

* 显示信息

* @param info

*/

public void showInfo(String info){

System.out.println("创建文件："+ info+ "成功！");

}

/**

* 获取系统时间

* @return

*/

public static String getDate(){

SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");

return simpleDateFormat.format(new Date());

}

}