JAVA利用FileReader和FileWrite拷贝文件

#java拷贝文件

public static void Copy(String oldFile,String newFile){
    try(FileReader file1 = new FileReader(oldFile);
        FileWriter file2 = new FileWriter(newFile)){

        char[] data = new char[1024];
        StringBuilder sb = new StringBuilder();

        while ((file1.read(data))!=-1){
            file2.write(data);
        }

    } catch (FileNotFoundException e) {
        throw new RuntimeException(e);
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}