edu.princeton.cs.algorithms.Cat Maven / Gradle / Ivy
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package edu.princeton.cs.algorithms;
import edu.princeton.cs.introcs.In;
import edu.princeton.cs.introcs.Out;
/*************************************************************************
* Compilation: javac Cat.java
* Execution: java Cat input0.txt input1.txt ... output.txt
* Dependencies: In.java Out.java
*
* Reads in text files specified as the first command-line
* arguments, concatenates them, and writes the result to
* filename specified as the last command-line arguments.
*
* % more in1.txt
* This is
*
* % more in2.txt
* a tiny
* test.
*
* % java Cat in1.txt in2.txt out.txt
*
* % more out.txt
* This is
* a tiny
* test.
*
*************************************************************************/
/**
* The Cat class provides a client for concatenating the results
* of several text files.
*
* For additional documentation, see Section 1.1 of
* Algorithms, 4th Edition by Robert Sedgewick and Kevin Wayne.
*
* @author Robert Sedgewick
* @author Kevin Wayne
*/
public class Cat {
// this class should not be instantiated
private Cat() { }
/**
* Reads in a sequence of text files specified as the first command-line
* arguments, concatenates them, and writes the results to the file
* specified as the last command-line argument.
*/
public static void main(String[] args) {
Out out = new Out(args[args.length - 1]);
for (int i = 0; i < args.length - 1; i++) {
In in = new In(args[i]);
String s = in.readAll();
out.println(s);
in.close();
}
out.close();
}
}