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public class Person implements Comparable { private String id; // ID public Person(String id, String name, String nameKana) { this.id = id; this.name = name; this.nameKana = nameKana; } public String getId() { return id; } public String getName() { return name; } public String getNameKana() { return nameKana; } public void setId(String string) { id = string; } public void setName(String string) { name = string; } public void setNameKana(String string) { nameKana = string; } public String toString() { } public int compareTo(Object obj) { return this.id.compareTo(((Person) obj).getId()); } } Person[] array = new Person[5]; for (int i = 0; i < array.length; i++) System.out.println(array[i]); List list = new ArrayList(); Collections.sort(list); for (int i = 0; i < list.size(); i++) System.out.println(list.get(i)); Person[] array = new Person[5]; Comparator asc = new Comparator() { public int compare(Object obj0, Object obj1) { String nameKana0 = ((Person) obj0).getNameKana(); String nameKana1 = ((Person) obj1).getNameKana(); int ret = 0; if ((ret = nameKana0.compareTo(nameKana1)) == 0) { String id0 = ((Person) obj0).getId(); String id1 = ((Person) obj1).getId(); ret = id0.compareTo(id1); } return ret; } }; for (int i = 0; i < array.length; i++) System.out.println(array[i]); Comparator desc = new Comparator() { public int compare(Object obj0, Object obj1) { String nameKana0 = ((Person) obj0).getNameKana(); String nameKana1 = ((Person) obj1).getNameKana(); int ret = 0; if ((ret = nameKana1.compareTo(nameKana0)) == 0) { String id0 = ((Person) obj0).getId(); String id1 = ((Person) obj1).getId(); ret = id1.compareTo(id0); } return ret; } }; for (int i = 0; i < array.length; i++) System.out.println(array[i]); |
Link: (5923d)
Modified by MT22(Moriwaki Takashi)
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