public static void main(String[] args) {
        int a = 0;
        FileInputStream in = null;
        FileOutputStream out = null;
        try {
            in = new FileInputStream("F:/hljk/HelloWorld.java");
            out = new FileOutputStream("D:/java/HW.java");
            while ((a = in.read()) != -1) {
                out.write(a);
            }
        } catch (FileNotFoundException e1) {
            System.out.println("此文件不存在");
            System.exit(-1);
        } catch (IOException e2) {
            System.out.println("复制失败");
            System.exit(-1);
        } finally {
            try {
                if (in != null) {
                    in.close();
                }
                if (out != null) {
                    out.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
        System.out.println("复制成功");

    }

------解决方案--------------------
多看看别人写的代码，多领会一下，然后自己写代码的时候注意一下，就能解决好多问题

------解决方案--------------------
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