使用类必须实现的字段和方法创建Java接口。
import java.util.List; /* 时代Java公众号 提供 */ interface TeamType { void setPlayers(List<Player> players); void setName(String name); void setCity(String city); String getFullName(); } public class Main { public static void main(String[] args) { TeamType team1 = new Team(); team1.getFullName(); /* 来 自* N o w J a v a . c o m - 时代Java */ } } class Player { private String firstName; private String lastName; private String position; private int status = -1; public Player() { } public Player(String position, int status) { this.position = position; this.status = status; } public String playerString() { return getFirstName() + " " + getLastName() + " - " + getPosition(); } /** * @return the firstName */ public String getFirstName() { return firstName; } /** * @param firstName * the firstName to set */ public void setFirstName(String firstName) { this.firstName = firstName; } /** * @return the lastName */ public String getLastName() { return lastName; } /** * @param lastName * the lastName to set */ public void setLastName(String lastName) { this.lastName = lastName; } /** * @return the position */ public String getPosition() { return position; } /** * @param position * the position to set */ public void setPosition(String position) { this.position = position; } /** * @return the status */ public int getStatus() { return status; } /** * @param status * the status to set */ public void setStatus(int status) { this.status = status; } } class Team implements TeamType { private List<Player> players; private String name; private String city; /** * @return the players */ public List<Player> getPlayers() { return players; } /** * @param players * the players to set */ public void setPlayers(List<Player> players) { this.players = players; } /** * @return the name */ public String getName() { return name; } /** * @param name * the name to set */