FileCopy2

//借鉴的^^
public class HW {
  public static void main(String[] args) {
	  int b = 0;
	  FileInputStream in = null;
	  FileOutputStream out = null;
	  try {
	    in = new FileInputStream("d:/share/java/HelloWorld.java");
	    out = new FileOutputStream("d:/share/java/io/HW.java");
	    while((b=in.read())!=-1){
	      out.write(b);
	    }
	    in.close(); 
	    out.close();
	  } catch (FileNotFoundException e2) {
	    System.out.println("找不到指定文件"); System.exit(-1);
	  } catch (IOException e1) {
	    System.out.println("文件复制错误"); System.exit(-1);
	  }
	  System.out.println("文件已复制");
  }
}