Java 创建方法和对象

大家好，所以我得到了这个驱动程序类，并被告知要创建类以使驱动程序类正常工作。在很大程度上，我认为我的思路是正确的，但我也不完全确定，因为我是java新手。我收到2个编译错误，因为我没有添加add（temp）方法。老实说，我不知道该把这个方法放进哪个类。现在我在团队课程中有它，但是我得到了一个编译错误。如果有人能给我一些见解，我将不胜感激

public class Driver{
 public static void main(String args[]) throws Exception{
    //All information is stored in input.txt and is being
    //read in below.
    Scanner input = new Scanner(new File("input.txt"));
    //Creates a new League and passes in a String signifying
    //which league it is.
    League american = new League("AL");
    League national = new League("NL");
    for(int i=0; i<15; i++){
        //Creates a new team and adds the current team
        //to the american league.
        //You can assume there are exactly 15 teams in each league.
        Team temp = new Team(input.next());
        american.add(temp);   // compile error
    }
    for(int i=0; i<15; i++){
        //Creates a new team and adds the current team
        //to the national league.
        //You can assume there are exactly 15 teams in each league.
        Team temp = new Team(input.next());
        national.add(temp);   // compile error 
    }
    }

我的团队课

public class Team
{
// instance variables - replace the example below with your own
private String team;

/**
 * Constructor for objects of class Team
 */
public Team(String Team)
{
    team = Team;
}

public void setTeam(String Team){
    this.team = Team;
}

public String getTeam(){
    return team;
}



public String add(League y)
{

    return y;       //compiling error 
}
}

此函数返回一个

字符串

。您正在传递参数

y

，它是一个

联盟

。然后尝试返回与产生错误的

字符串相同的
League

将返回类型更改为
League
，或者不返回
y
，而是返回一个有意义的字符串（甚至
y.toString（）
）
始终发布编译错误
add（）
方法应该在
League
类中：
public void add（Team Team）{/*…*/}
。另外，用
java
标记你的问题。我会在一秒钟内将它们添加到league类中。我是否正确地将getLeagueAmerican和getLeagueNational设置为两个，或者我应该只设置getLeague和setLeague？Robbie在add方法的主体中添加了什么？
public class Team
{
// instance variables - replace the example below with your own
private String team;

/**
 * Constructor for objects of class Team
 */
public Team(String Team)
{
    team = Team;
}

public void setTeam(String Team){
    this.team = Team;
}

public String getTeam(){
    return team;
}



public String add(League y)
{

    return y;       //compiling error 
}
}

public String add(League y)
{
    return y;       //compiling error 
}