1: ……
2: public boolean equals(Object obj) {
3: if (obj == null)
4: return false;
5: int i1 = this.hashCode();
6: int i2 = obj.hashCode();
7:
8: if (i1 == i2)
9: return true;
10: else
11: return false;
12: }
13: public int hashCode() {
14: return new HashCodeBuilder(17, 37).toHashCode();
15: }