<分区>
我有一个类“Person”,它包含一个带有 3 个参数的构造函数。 现在我想要一个排序选项,我需要它按 ID、名称或地址升序和降序排序
public class Person
{
private int id;
private String name;
private String addr;
public Person()
{
id = MyTools.getInteger("ID: ");
name = MyTools.getString("Name: ");
addr = MyTools.getString("Address: ");
}
这里是我要排序的地方:
public static void main(String[] args) throws FileNotFoundException
{
boolean loop = true;
System.out.println("Choose:");
System.out.println("\t" + "0 = Exit programm");
System.out.println("\t" + "1 = Add new");
System.out.println("\t" + "2 = Show");
System.out.println("\t" + "3 = Sort");
System.out.println("\t" + "4 = Delete");
System.out.println("\t" + "5 = Save");
System.out.println("\t" + "6 = Help");
TextFile tf = new TextFile("AdressVerwaltung.txt", 'o');
List<Person> adressen = new ArrayList<Person>();
int listSize = 0;
while (loop)
{
int choice = MyTools.getInteger("Please choose which operation you want
to execute (6 = Help): "+"\n");
switch (choice)
{
case 0:
System.out.println("Programmende");
for (int k = 0; k < listSize; k++)
{
tf.printLine(adressen.get(k).toString());
}
tf.close();
loop = false;
break;
case 1:
Person p = new Person();
adressen.add(p);
System.out.println("Data is put in Array!");
listSize = adressen.size();
break;
case 2:
break;
case 3:
break;
现在我希望能够选择是按 ID、按名称还是按地址排序