Question

Java 中ArrayList<Object> 如何去除其中重复的对象? 最好举个例子

Answer 1

import java.util.ArrayList;
import java.util.List;

public class Test{
public static void main(String[] args) {
List<Object> list = new ArrayList<Object>() ;

A a = new A("a");
A b = a ;
A c = new A("c");
A d = new A("d");
A e = d ;
A f = a ;

list.add(a);
list.add(b);
list.add(c);
list.add(d);
list.add(e);
list.add(f);

List<Object> newList = new ArrayList<Object>();

int size = list.size() ;
for(int i = 0 ; i < size ; i++){
if(! list.subList(i+1, size).contains(list.get(i))){
newList.add(list.get(i));
}
}

for(Object o : newList){
System.out.println(o);
}

}

}

class A{

private String name ;

A(String name){
this.name = name ;
}
@Override
public String toString(){
return name ;
}
}