implementing compareTo method for several fields

Question

I want to compare two object based on 5-tuple which are: srcAddr, dstAddr, srcPort, dstPort, protocol

here is what i have:

public class Flows implements          


        

Answer 1

You can write like this also, I have done like this in my project

public int compareTo(Flows arg0) {
    int comp1, comp2, comp3, comp4;
    comp1 = this.srcAddr.compareTo(arg0.srcAddr);
    comp2 = this.dstAddr.compareTo(arg0.dstAddr);
    comp3 = this.srcPort.compareTo(arg0.srcPort);
    comp4 = this.protocol.compareTo(arg0.protocol);

    if (comp1 == 0 && comp2 == 0 && comp3 == 0 && comp4 == 0) {
        return 0;
    } else {

        if (comp1 != 0)
            return comp1;
        else {
            if (comp2 != 0)
                return comp2;
            else {
                if (comp3 != 0)
                    return comp3;
                else {
                    if (comp4 != 0)
                        return comp4;
                    else
                        return 0;
                }
            }
        }

    }

}