リストの並べ替え
1302 ワード
javabean:
//
public class Territory{
private int id;
private String territoryName;
public void setId(int id){
this.id = id;
}
public int getId(){
return id;
}
public void setTerritoryName(String territoryName){
this.territoryName = territoryName;
}
public String getTerritoryName(){
return territoryName;
}
}
:
public class DataMigrationDao{
Territory t1 = new Territory();
t1.setId(5);
t1.setTerritoryName("t1");
Territory t2 = new Territory();
t2.setId(1);
t2.setTerritoryName("t2");
Territory t3 = new Territory();
t2.setId(3);
t2.setTerritoryName("t3");
List<Territory> list = new ArrayList<Territory>();
list.add(t1);
list.add(t2);
list.add(t3);
// list
Collections.sort(list, new CompareUnit());
.....
// list
}
//
// , , if(..>..){return -1} if(..<..){return 1} return 0
class CompareUnit implements Comparator<Territory>{
@Override
public int compare(Territory t1, Territory t2) {
if(t1.getId()<t2.getId()){
return -1;
}
if(t1.getId()>t2.getId()){
return 1;
}
return 0;
}
}