用JAVA制作一个文件系统管理器文件目录浏览，创建目录，移动文件，文件改名，文件删除等等功能

/**

* 取得当前目录下文件对象

* @return

*/

public static Iterator getFiles(File currentFile) {

Vector vector = new Vector()

File afile[] = currentFile.listFiles()

for (int i = 0i <afile.lengthi++)

if (afile[i].isFile())

vector.add(afile[i])

return vector.iterator()

}

/**

* 取得当前目录下的子目录对象列表

* @return

*/

public static Iterator getAllDirectories(File currentFile) {

Vector vector = new Vector()

File afile[] = currentFile.listFiles()

//vector.add(new File(documentRoot, relativeFile + File.separator + "."))

try {

vector.add(new File(currentFile.getCanonicalFile() + File.separator + ".."))

for (int i = 0i <afile.lengthi++)

if (afile[i].isDirectory())

vector.add(afile[i])

} catch (IOException e) {

if (log.isErrorEnabled()) log.error(e)

}

return vector.iterator()

}

/**

* 取得当前目录下的子目录对象列表

* @return

*/

public static Iterator getDirectories(File currentFile) {

Vector vector = new Vector()

File afile[] = currentFile.listFiles()

for (int i = 0i <afile.lengthi++)

if (afile[i].isDirectory())

vector.add(afile[i])

return vector.iterator()

}

/**

* 将内容写入文件

* @param file

* @param content

* @throws IOException

*/

public static void writeFile(String file, String content)

throws IOException {

PrintWriter printwriter = new PrintWriter(new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file),BIND_ENCODING)))

printwriter.write(content)

printwriter.close()

if (printwriter.checkError())

if (log.isErrorEnabled())

log.error("Error encountered while writing the file!")

else

return

}

代码太长，分批发.

public class complie {

int i,j

public complie(int i,int j)//构建一个复数类

{

this.i=i

this.j=j

}

complie add(complie c)//复数加法

{

int l,k

l=c.i+i

k=c.j+j

return (new complie(l,k))

}

complie cut(complie c)//复数减法

{

int l,k

l=i-c.i

k=j-c.j

return (new complie(l,k))

}

void ToString()//将复数输出

{

System.out.println("复数为："+i+"+"+j+"i")

}

public static void main(String[] args)

{

complie a=new complie(4,5)

complie b=new complie(2,3)

System.out.println("构造的复数类为：")

a.ToString()

b.ToString()

System.out.println("运算复数a+b=：")

a.add(b).ToString()

System.out.println("运算复数a-b=：")

a.cut(b).ToString()

}

}

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