我有一个超级班"播放器"和3个子课程" BaseballPlayer"," FootballPlayer"和" BasketballPlayer" ...为了简单起见,我只会分享"播放器&#34 ;和" BaseballPlayer"。
我尝试将数据存储到这些类的对象中,但我似乎无法将其打印出来并将其打印出来。
Player.java
public class Player {
private int id;
private String playerName;
private String teamName;
private String position;
private double salary;
private double commisionRate;
/* Default Constructor */
public Player() {
}
/* Constructor */
public Player(int id, String playerName, String teamName, String position, double salary, double commisionRate) {
this.id = id;
this.playerName = playerName;
this.teamName = teamName;
this.position = position;
this.salary = salary;
this.commisionRate = commisionRate;
}
/* Getters */
public int getID() {
return id;
}
public String getPlayerName() {
return playerName;
}
public String getTeamName() {
return teamName;
}
public String getPosition() {
return position;
}
public double getSalary() {
return salary;
}
public double getCommisionRate() {
return commisionRate;
}
/* Setters */
public void setID(int id) {
this.id = id;
}
public void setPlayerName(String playerName) {
this.playerName = playerName;
}
public void setTeamName(String teamName) {
this.teamName = teamName;
}
public void setPosition(String position) {
this.position = position;
}
public void setSalary(double salary) {
this.salary = salary;
}
public void setCommision(double commisionRate) {
this.commisionRate = commisionRate;
}
/* Effectors */
public double calcCommision()
{
return salary * commisionRate;
}
}
BaseballPlayer.java
public class BaseballPlayer extends Player {
public static final double Threshold = 0.25;
private int numOfHits;
private int numAtBat;
/* Default Constructor */
public BaseballPlayer() {
}
/* Constructor */
public BaseballPlayer(int id, String playerName, String teamName, String position, double salary, double commisionRate, int numOfHits, int numAtBat) {
super(id, playerName, teamName, position, salary, commisionRate);
this.numOfHits = numOfHits;
this.numAtBat = numAtBat;
}
/* Getters */
public int getNumOfHits() {
return numOfHits;
}
public int getNumAtBat() {
return numAtBat;
}
/* Setters */
public void setNumOfHits(int numOfHits) {
this.numOfHits = numOfHits;
}
public void setNumAtBat(int numAtBat) {
this.numAtBat = numAtBat;
}
/* Effectors */
public double calcStats()
{
return numOfHits / numAtBat;
}
public boolean detStatus()
{
if(calcStats() > Threshold) {
return true;
} else {
return false;
}
}
}
假设我使用这两个类创建了一个对象......
Player BaseballPlayer1 = new BaseballPlayer(4, "Jeff Jefferson", "Kentucky Kangaroos", "3rd Base", 340000.00, 0.02, 40, 5);
但是,每当我调用此对象获取数据时,它都不会打印任何内容......
System.out.printf("Player ID: ", BaseballPlayer1.getID());
我错过了什么?我已经看了SO和Google,我的IDE没有显示任何错误,但getID()没有返回任何值...
答案 0 :(得分:0)
这应该有效:
System.out.printf("Player ID: %d", baseballPlayer.getID());
查看this,例如System.out.printf()的使用情况。