判断两个对象是否相等:hashcode
public int hashCode() {
int result = this.name != null ? this.name.hashCode() : 0;
result = 31 * result + (this.key != null ? this.key.hashCode() : 0);
。。。每个属性的hashcode
return result;
}
public int hashCode() {
int result = this.name != null ? this.name.hashCode() : 0;
result = 31 * result + (this.key != null ? this.key.hashCode() : 0);
。。。每个属性的hashcode
return result;
}