java.io

public static void Url() throws MalformedURLException{ File file = new File("b.txt"); URL url =null; url = file.toURL(); String dir =file.getPath(); System.out.print(file.getAbsolutePath()); file.renameTo(new File(dir,file.getName())); } public static void cope()throws IOException{ File file = new File("b.txt"); File file2 = new File("c.txt"); if(!file2.exists()){ file2.createNewFile(); } FileInputStream in = new FileInputStream(file); // InputStream in = url.openStream(); FileOutputStream out = new FileOutputStream(file2); byte[] buffer = new byte[4096]; int data; while((data = in.read(buffer))!=-1){ out.write(buffer,0,data); } in.close(); out.close(); } public static void read() throws IOException{ File file = new File("b.txt"); System.out.print("Overwrite existing file " + file.getName() +"? (Y/N): "); System.out.flush(); BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); String readtowrite = in.readLine(); BufferedWriter ot = new BufferedWriter(new FileWriter("b.txt")); ot.write(readtowrite); ot.close(); } public static void test() throws IOException{ File file = new File("b.txt"); if(!file.exists()){ file.createNewFile(); } File file2 = new File("c.txt"); if(!file2.exists()){ file2.createNewFile(); } FileInputStream in = new FileInputStream(file); // InputStream in = url.openStream(); FileOutputStream out = new FileOutputStream(file2); byte[] buffer = new byte[4096]; int data; while((data = in.read(buffer))!=-1){ out.write(buffer,0,data); } in.close(); out.close(); } public static void compress() throws IOException{ File file = new File("b.txt"); FileInputStream in = new FileInputStream(file); String to =file.getName()+".zip"; GZIPOutputStream out = new GZIPOutputStream(new FileOutputStream("e:/"+to)); byte[] buffer = new byte[4096]; int data; while((data = in.read(buffer))!=-1){ out.write(buffer,0,data); } in.close(); out.close(); }