package model;

public class Row_i implements Cloneable, Comparable<Row_i> {
    public int id_A, id_B, startPosA, startPosB, endPosA, endPosB, rowType;

    public Row_i clone() {
        try {
            return (Row_i)super.clone();
        } catch(CloneNotSupportedException e) {
            return null;
        }
    }

    public Row_i() {}

    public Row_i(int id_A, int id_B, int startPosA, int startPosB, int endPosA, int endPosB, int rowType) {
        this.id_A = id_A;
        this.id_B = id_B;
        this.startPosA = startPosA;
        this.startPosB = startPosB;
        this.endPosA = endPosA;
        this.endPosB = endPosB;
        this.rowType = rowType;

    }

    public int compareTo(Row_i other) {
	// swap "this" and "other" to reverse sort order
        int c = this.id_A - other.id_B;
        if (c != 0) return c;
        c = this.id_B - other.id_B;
        if (c != 0) return c;
        c = this.startPosA - other.startPosA;
        if (c != 0) return c;
        c = this.startPosB - other.startPosB;
        return c;
    }

    public boolean equals(Object other) {
       ... implement equals
    }

    public int hashcode() {
       ... implement hashcode
    }
}

// somewhere else

SortedSet<Row_i> rows = new TreeSet<Row_i>();

rows.add( ... )

for (Row_i row: rows) {
    // iterating over sorted rows
}