Thread: String O string where are you?

I'm trying to write a program that splits string up and prints it backwards. But it does not work.

My questione: When I type domain name www.apple.com after pressing enter nothing happens until I press ctrl+z and then the correct output comes out: com.apple.www

Why is that?

 
import java.util.Arrays;
 
public class Domain {//method reverseDomain
    private final String[] fields;
    private final int N;
 
    // store fields in reverse order
    public Domain(String name) {
        fields = name.split("\\.");
        N = fields.length;
    }
 
    // return string representation - fields, delimited by .
    public String toString() {
        if (N == 0) return "";
        String s = fields[0];
        for (int i = 1; i < N; i++)
            s = fields[i] + "." + s;
        return s;
    }
 
    // compare by reverse domain name
    public int compareTo(Domain that) {
        for (int i = 0; i < Math.min(this.N, that.N); i++) {
            String s = this.fields[this.N - i - 1];
            String t = that.fields[that.N - i - 1];
            int c = s.compareTo(t);
            if      (c < 0) return -1;
            else if (c > 0) return +1;
        }
        return this.N - that.N;
    }
 
     // test client
    public static void main(String[] args) {
 
        // read in domain names
        String[] names = StdIn.readAll().split("\\s+");
        Domain[] domains = new Domain[names.length];
        for (int i = 0; i < domains.length; i++) {
            domains[i] = new Domain(names[i]);
        }
 
        // sort
        Arrays.sort(domains);
 
        // print results
        for (int i = 0; i < domains.length; i++) {
            StdOut.println(domains[i]);
        }
    }
}

I suspect it is due to the way the StdIn.readAll() method works. Read the documentation for that call and see why it might be acting that way. I changed your code to use Scanner and System.out, and it works fine.