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(); } }