001package algs11; 002import stdlib.*; 003/* *********************************************************************** 004 * Compilation: javac Wget.java 005 * Execution: java Wget url 006 * 007 * Reads in a URL specified on the command line and saves its contents 008 * in a file with the given name. 009 * 010 * % java Wget http://www.cs.princeton.edu/IntroProgramming/datafiles/codes.csv 011 * 012 *************************************************************************/ 013 014public class XWget { 015 016 public static void main(String[] args) { 017 args = new String[] { "http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html" }; 018 019 // read in data from URL 020 String url = args[0]; 021 In in = new In(url); 022 if (!in.exists ()) 023 System.exit (1); 024 String data = in.readAll(); 025 026 String filename = url.substring(url.lastIndexOf('/') + 1); 027 if (filename.length () <= 0) { 028 StdOut.println (data); 029 } else { 030 // write data to a file 031 Out out = new Out(filename); 032 out.println(data); 033 out.close(); 034 StdOut.println ("Output in file \"" + filename + "\""); 035 } 036 } 037}