68 lines
2.0 KiB
Java
68 lines
2.0 KiB
Java
|
|
||
|
|
|
||
|
|
import edu.princeton.cs.introcs.In;
|
||
|
|
import edu.princeton.cs.introcs.StdIn;
|
||
|
|
import edu.princeton.cs.introcs.StdOut;
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
* Compilation: javac Whitelist.java
|
||
|
|
* Execution: java Whitelist whitelist.txt < data.txt
|
||
|
|
* Dependencies: StaticSetOfInts.java In.java StdOut.java
|
||
|
|
*
|
||
|
|
* Data files: http://algs4.cs.princeton.edu/11model/tinyW.txt
|
||
|
|
* http://algs4.cs.princeton.edu/11model/tinyT.txt
|
||
|
|
* http://algs4.cs.princeton.edu/11model/largeW.txt
|
||
|
|
* http://algs4.cs.princeton.edu/11model/largeT.txt
|
||
|
|
*
|
||
|
|
* Whitelist filter.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* % java Whitelist tinyW.txt < tinyT.txt
|
||
|
|
* 50
|
||
|
|
* 99
|
||
|
|
* 13
|
||
|
|
*
|
||
|
|
* % java Whitelist largeW.txt < largeT.txt | more
|
||
|
|
* 499569
|
||
|
|
* 984875
|
||
|
|
* 295754
|
||
|
|
* 207807
|
||
|
|
* 140925
|
||
|
|
* 161828
|
||
|
|
* [367,966 total values]
|
||
|
|
*
|
||
|
|
*************************************************************************/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The Whitelist class provides a client for reading in
|
||
|
|
* a set of integers from a file; reading in a sequence of integers
|
||
|
|
* from standard input; and printing to standard output those
|
||
|
|
* integers not in the whitelist.
|
||
|
|
*
|
||
|
|
* For additional documentation, see Section 1.2</a> of
|
||
|
|
* Algorithms, 4th Edition by Robert Sedgewick and Kevin Wayne.
|
||
|
|
*
|
||
|
|
* @author Robert Sedgewick
|
||
|
|
* @author Kevin Wayne
|
||
|
|
*/
|
||
|
|
public class Whitelist {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Reads in a sequence of integers from the whitelist file, specified as
|
||
|
|
* a command-line argument. Reads in integers from standard input and
|
||
|
|
* prints to standard output those integers that are not in the file.
|
||
|
|
*/
|
||
|
|
public static void main(String[] args) {
|
||
|
|
In in = new In(args[0]);
|
||
|
|
int[] white = in.readAllInts();
|
||
|
|
StaticSETofInts set = new StaticSETofInts(white);
|
||
|
|
|
||
|
|
// Read key, print if not in whitelist.
|
||
|
|
while (!StdIn.isEmpty()) {
|
||
|
|
int key = StdIn.readInt();
|
||
|
|
if (!set.contains(key))
|
||
|
|
StdOut.println(key);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|