我開始使用類來創建一個簡單的觸點輸出開始,然後一個更新的版本是這樣的: My Contacts
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??? Murphy 555-555-8980
George Smith 555-555-2323
Mike Johnson 555-555-4780
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My Contacts
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Cade Murphy
調用變量i有這樣的代碼: public class Barrier
{
private Car myCar;
private Sensor mySensor;
private Card myCard;
public Barrier()
{
myCar = new Car();
mySensor = new Sensor();
my