[英]Java/BlueJ - Trouble printing out items in an ArrayList
我在循環/返回ArrayList中的正確項目時遇到問題。 當我運行程序並使用訪問器方法時,它將在終端中返回諸如“ Member @ 13243”之類的項目,而不是我嘗試返回的實際成員。 我有兩堂課,一堂是“家庭”,一堂是“會員”。
我的任務是:2)getMembers()–返回已添加到Family的成員列表。 3)getMembers(string s)-返回已經添加到Family中的成員列表。 一種。 如果指定的性別無效,將輸出錯誤。 4)showMembers()–使用Member的toString打印已添加到家庭的成員列表5)showMembers(string s)–使用Member的toString打印已添加到指定性別的家庭成員的列表。
我的家庭類代碼:
public class Family
{
// instance variables - replace the example below with your own
public int ID;
public String FamilyName;
public String Address;
public String City;
public String State;
public String ZipCode;
public ArrayList<Member> list;
public Family(int ID, String FamilyName, String Address, String City, String State, String ZipCode)
{
this.ID = ID;
this.FamilyName = FamilyName;
this.Address = Address;
this.City = City;
this.State = State;
this.ZipCode = ZipCode;
list = new ArrayList<Member>();
}
public void addMember(Member m ) {
list.add(m);
}
private ArrayList<Member> getMembers(){
return list;
}
public void showAll(){
System.out.println(ID);
System.out.println(Member.memberName);
System.out.println(FamilyName);
System.out.println(Member.memberSex);
System.out.println(Address);
System.out.println(City);
System.out.println(State);
System.out.println(ZipCode);
}
我給班級成員的代碼:
public class Member
{
private String memberName;
private String memberSex;
public Member(String memberName, String memberSex){
this.memberName = memberName;
this.memberSex = memberSex;
if (memberSex == "M"){
memberSex = "M";}
else if (memberSex == "F"){
memberSex = "F";}
else System.out.println("Please enter M or F for sex");
}
public String getMemberName(){
return memberName;
}
public String getMemberSex(){
return memberSex;
}
您應該在Member類中重寫toString方法。
@Override
public String toString() {
return "Member: "+memberName, "Sex "+memberSex;
}
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