org.jgroups.tests.CheckMonotonicallyIncreasingNumbers Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of wildfly-client-all

This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

There is a newer version: 35.0.0.Beta1

Show newest version

package org.jgroups.tests;

import java.io.*;

/**
 * Checks whether numbers in a stream are monotonically increasing, e.g.
 *  * 1
 * 2
 * 3
 * 4
 * 
 * @author Bela Ban
 */
public class CheckMonotonicallyIncreasingNumbers {

    static int check(InputStream in) throws IOException {
        Reader r = new BufferedReader(new InputStreamReader(in));
        StreamTokenizer st = new StreamTokenizer(r);
        int i, cnt=0, num=0, tmp, incorrect=0;
        boolean first_read=false;

        while(true) {
            i=st.nextToken();
            if(i == StreamTokenizer.TT_EOF)
                break;
            tmp=(int)st.nval;
            if(!first_read) {
                first_read=true;
            }
            else {
                if(tmp != num +1) {
                    System.err.println("Number read: " + tmp + ", previous number: " + num +
                            " (lineno: " + st.lineno() + ")");
                    incorrect++;
                }
            }
            num=tmp;
            cnt++;
            if(cnt > 0 && cnt % 1000 == 0)
                System.out.println("read " + cnt + " numbers");
        }
        return incorrect;
    }


    public static void main(String[] args) throws IOException {
        String file=null;
        for(int i=0; i < args.length; i++) {
            if(args[i].equals("-file")) {
                file=args[++i];
                continue;
            }
            help();
            return;
        }
        FileInputStream fis=new FileInputStream(file);
        int incorrect=CheckMonotonicallyIncreasingNumbers.check(fis);
        if(incorrect == 0) {
            System.out.println("OK, all numbers are monotonically increasing");
        }
        else {
            System.err.println("Failure: there are " + incorrect + " incorrect numbers");
        }
        fis.close();
    }

    private static void help() {
        System.out.println("CheckMonotonicallyIncreasingNumbers [-help] [-file ]");
    }
}