Share on Google+Share on Google+

wayne tucker
Please help need quick!!! Thanks
1 Answer(s)      5 years and 10 months ago
Posted in : Java Beginners

hey i keep getting stupid compile errors and don't understand why. i'm supposed to use abstract to test a boat race simulation program of sorts here is my code:

RentforthBoatRace.java

public abstract class RentforthBoatRace {

    public abstract double getSum();


}

testRentforthBoatRace.java

import java.util.Scanner;

public class TestRenforthBoatRace {

    public static void main(String args[]) {

    double lowest = getLowestWeight();

        RedBoat redboat = new RedBoat(makeTeam());
        GreenBoat greenboat = new GreenBoat(makeTeam());
        YellowBoat yellowboat = new YellowBoat(makeTeam());
        BlueBoat blueboat = new BlueBoat(makeTeam());
        OrangeBoat orangeboat = new OrangeBoat(makeTeam());

    System.out.println("The winner is " + lowest);

}
    public static double[] makeTeam(){

        Scanner input = new Scanner(System.in);

        double[] team = new double[10];

        for(int i = 0; i < team.length; i++){
            team[i] = input.nextDouble();
        }

        return team;
}

    public static double getLowestWeight(double[] array) {  

        double lowest;

            array[0] = redboat.getSum();
            array[1] = greenboat.getSum();
            array[2] = yellowboat.getSum();
            array[3] = blueboat.getSum();
            array[4] = orangeboat.getSum();

            for(int i = 1; i < array.length ; i++){  
                if(array[i] < lowest){  

                    lowest = array[i]; 
                }
            }
            return lowest;
    }


}

RedBoat.java

public class RedBoat extends RentforthBoatRace {

private double[] team1 = new double[10];

public RedBoat( double[] team1){

    for(int i = 0; i < team1.length; i++) {
        this.team1[i] = team1[i];
    }

}

public double getSum(){
    double sum = 0;

    for(int i = 0; i < team1.length; i++){
        sum = sum + team1[i];
    }

    return sum;

}
}

GreenBoat.java

public class GreenBoat extends RentforthBoatRace {

private double[] team1 = new double[10];

public GreenBoat( double[] team1){

    for(int i = 0; i < team1.length; i++) {
        this.team1[i] = team1[i];
    }

}

public double getSum(){
    double sum = 0;

    for(int i = 0; i < team1.length; i++){
        sum = sum + team1[i];
    }

    return sum;

}
}

YellowBoat.java

public class YellowBoat extends RentforthBoatRace {

private double[] team1 = new double[10];

    public YellowBoat( double[] team1){

    for(int i = 0; i < team1.length; i++) {
        this.team1[i] = team1[i];
    }

}

public double getSum(){

    double sum = 0;

    for(int i = 0; i < team1.length; i++){
        sum = sum + team1[i];
    }

    return sum;

}
}

BlueBoat.java

public class BlueBoat extends RentforthBoatRace {

double totalWeight4;

private double[] team1 = new double[10];

    public BlueBoat( double[] team1){

    for(int i = 0; i < team1.length; i++) {
        this.team1[i] = team1[i];
    }

}

public double getSum(){
    double sum = 0;

    for(int i = 0; i < team1.length; i++){
        sum = sum + team1[i];
    }

    return sum;

}
}

OrangeBoat.java

public class OrangeBoat extends RentforthBoatRace {

double[] team1 = new double[10];

    public OrangeBoat( double[] team1){

    for(int i = 0; i < team1.length; i++) {
        this.team1[i] = team1[i];
    }

}

public double getSum(){
    double sum = 0;

    for(int i = 0; i < team1.length; i++){
        sum = sum + team1[i];
    }

    return sum;

    }
}

compile errors:

TestRenforthBoatRace.java:7: getLowestWeight(double[]) in TestRenforthBoatRace cannot be applied to ()
    double lowest = getLowestWeight();
                    ^
TestRenforthBoatRace.java:35: cannot find symbol
symbol  : variable redboat
location: class TestRenforthBoatRace
            array[0] = redboat.getSum();
                       ^
TestRenforthBoatRace.java:36: cannot find symbol
symbol  : variable greenboat
location: class TestRenforthBoatRace
            array[1] = greenboat.getSum();
                       ^
TestRenforthBoatRace.java:37: cannot find symbol
symbol  : variable yellowboat
location: class TestRenforthBoatRace
            array[2] = yellowboat.getSum();
                       ^
TestRenforthBoatRace.java:38: cannot find symbol
symbol  : variable blueboat
location: class TestRenforthBoatRace
            array[3] = blueboat.getSum();
                       ^
TestRenforthBoatRace.java:39: cannot find symbol
symbol  : variable orangeboat
location: class TestRenforthBoatRace
            array[4] = orangeboat.getSum();
                       ^
6 errors

any help would be appreciated guys. Thanks so much

Ads

View Answers

June 14, 2011 at 5:15 PM


Hi Wayne Tuker

The first error at line number 7 is due to getLowestWeight() function is defined with arguments you can use it like this :

 double lowest = getLowestWeight(Some array of type double);

And rest of the error is because you haven't created object for redboat,yellowboat,greenboat, blueboat and orangeboat.

You need to create object for example for class redboat you must create object like this :

RedBoat redboat = new RedBoat();

After this you can use below statement :

array[0] = redboat.getSum();

And also you need to declare array before using it..










Related Tutorials/Questions & Answers:
Tutorials   
Java Spring Hibernate Struts Training Retrieve database from the table dynamically in jsp from oracle using servlet What does core Java include? java What are some way to learn Java quickly? Is it required to learn Java before learning Java Script? Is it necessary to learn java script before learning PHP? Are HTML5 and Java Script boosts Java career? Is Java object oriented? Fingerprint application with Java Uninstall Oracle Virtual Box JSON to HashMap Free Java online Training I want example of Control Statement in Java ANSI Color Codes with Python Create a Program that Calculates Input What is difference between JDK,JRE and JVM? How to see ubuntu version on server? How to get Page Source in Selenium (WebDriver) using Java? The path to the driver executable must be set by the webdriver.gecko.driver system property parse data from a link in java Java Program Qns using BlueJ How to fix HAX Kernel Module Is Not Installed error? Installing Audacity Looking for code Logic to check track changes & Coments in MSWord, MSWordx, MSExcel, MSExcelx is ON/OFF Installing JDK on Mac SAX Parser exception ERROR 601 (42P00): Syntax error. Encountered Thread java.lang.NoClassDefFoundError: org/apache/commons/fileupload/FileItemFactory How to install Ubuntu 16.04 LTS? HttpServletRequest cannot be resolved to a type in eclipse - Solved Unhandled event loop exception GC overhead limit exceeded Spring Data jpa with apache phoenix Caused by: java.lang.IllegalArgumentException: Not a host:port pair: PBUF o.a.h.h.z.RecoverableZooKeeper - Possibly transient ZooKeeper, quorum= com.thinkaurelius.titan.diskstorage.hbase.HBaseStoreManager class not found com.thinkaurelius.titan.diskstorage.hbase.HBaseStoreManager not found How to download and install Java 8 on Windows? How to uninstall JDK 7? How to install gtk-doc-tools package in Ubuntu? How to install Oracle JDK 8 on Ubuntu? ejabberd_ctl.beam not found - Solved How to convert date to UTC format in Java? How to install autoconf, automake and libtool in Ubuntu 15.10? How to convert current date to mm dd yyyy format in Java? How to convert current date to dd mm yyyy format in Java? How to stop window closing in "internalFrameClosing" event. How to find list of all index in Neo4j? neo4j-server.properties file location SASLError using PLAIN: not-authorized

Ads

 
Advertisement null

Ads