Making a priority Class

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I have 3 similar classes one with the highest priority, the medium priority and the lowest (bulk) priority. They should be compared with compareTo(Abstract Parcel), with higher priority = 1, same priority = 0 and lower priority = -1. Also we have to make a method TransportMode shipBy(), where items with high priority are shipped with PLANE, with medium priority with TRAIN and items with low priority with TRUCK. Now if I understand it right all classes are almost similar. So here is my example for the lowest priority.

It seems like I did have something wrong, but I don´t know what it is. For help I would be great full.

package parcel;

public abstract class BulkParcel extends AbstractParcel {

public BulkParcel() {
}

@Override
public int compareTo(AbstractParcel o) {
    if (newitem = 1) {
        return Priority.HIGH;
    }
    else {
        if (newitem = 0) {
            return Priority.MEDIUM;
        }
    }
    else {
        if (newitem = -1) {
            return Priority.BULK;
        }
    }
}

@Override
public TransportMode shipBy() {
    if (getPriority() = Priority.HIGH) {
        return TransportMode.PLANE;
    }
    else {
        if (getPriority() = Priority.MEDIUM) {
        return TransportMode.TRAIN;
        }
    }
    else {
        if (getPriority() = Priority.BULK) {
        return TransportMode.TRUCK;
        }
    }
}

/**
 * Returns the priority of a parcel.
 * 
 * @return the parcel's priority.
 */
@Override
Priority getPriority() {
    return Priority.BULK;
}

/**
 * Gives information about the parcel.
 * 
 * @return some information about the parcel with Bulk parcel no. <id> with priority bulk.
 */
@Override
String getInfo() {
    String info = "shipBy()" + "getpriority()";
    return info;
}

}

asked 29 secs ago

Stef

10

Making a priority Class