大家好,我是Java的新手,并且仍然试图了解阵列,我们非常感谢任何帮助。我的程序需要读取如下所示的CSV文件,并删除或添加一个人到ArrayList
person, add, personid, firstname
person, del, personid
所以我想弄清楚如何最好地解决这个问题,我基本上需要搜索一个有序的数组列表并从列表中删除那个人。
来自主类的代码。
public static void processPersonDeletion(String[]theLines){
Person personDel = new Person();
setPersonAttributes(personDel, theLines);
if(!personDel.equals(theLines)){
System.out.println("Person with license " + theLines[2] + " has "
+ "been removed from the log \nAll persons "
+ "properties will will also be removed from their "
+ "property log");
}
}
第二类代码
public class PersonLogImpl {
private boolean remove;
private boolean isPersonIdUnique;
private boolean add;
private ArrayList<Person> person = new ArrayList<>();
public ArrayList<Person> getPersonLog(){
return person;
}
public boolean add(person obj){ //add person object to ordered list
person.add(obj);
return add;
}
public boolean remove (String license){ //remove Person with specific license from list
person.remove(license); // and return true if successful
return remove;
}
// test if person with specific personid exists in log
public boolean isPersonIdUnique(String license){
isLicenseUnique = true;
return isLicenseUnique;
}
}
答案 0 :(得分:2)
在arrayList
中,您可以找到带
int index = MyArrayList.indexof(MyObject)
然后你可以使用
删除它MyArrayList.remove(index)
无论如何,我认为你应该这样做
ArrayList<Person> person = new ArrayList<Person>();
在构造函数中。