创建一个程序, 可以将多个文件的内容合并到一个文件中。用户可以使用以下命令来执行此 java 程序: java 程序名称  源代码1 源代码 2

please create a program that can combine the content of multiple files together into a single file. A user can use the following command to execute this java program: java ProgramName source1 source2... sourceN TargetFile


此外
我在网上找了一个例子，不知道能否运行：
import *;
public class fileDemo
{
public static void main(String[] args)throws IOException
{
File file1=new File("c:\\11.txt");
File file2=new File("c:\\12.txt");
FileInputStream fis=new FileInputStream(file2);
InputStreamReader isr=new InputStreamReader(fis);
FileOutputStream fos=new FileOutputStream(file1,true);
OutputStreamWriter osw=new OutputStreamWriter(fos);
int c;
while((c=isr.read())!=-1)
{
osw.write((char)c);
}
isr.close();
osw.close();
}
}