java集合，ArrayList，LinkedList知识点总结

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@Override
public String toString() {
return “Person [name=” + name + “, age=” + age + “]”;
}
@Override
public boolean equals(Object obj) {
```
Person p = (Person)obj;return this.name.equals(p.name) && this.age == p.age;
```
}
Iterator it = list.iterator();
while (it.hasNext()){
Person p = it.next();
System.out.println(p.getName()+”….”+p.getAge());
//System.out.println(it.next().getName()+”…..”+it.next().getAge());//第二个it.next()指针又向后移动
}
String arr[] = list.toArray(new String [0]);//
for (int i = 0; i < arr.length; i++) {
System.out.println(arr[i]);
}
private static void demo1() {
String arr[] = {“11”,”12”,”13”,”14”,”15”};
List list = Arrays.asList(arr); //数组加进集合
System.out.println(list);
}
String arr[] = list.toArray(new String [0]);//
for (int i = 0; i < arr.length; i++) {
System.out.println(arr[i]);
}

public static ArrayList getSingle(ArrayList list){

ArrayList newlist = new ArrayList();Iterator it = list.iterator();while (it.hasNext()){    Object ob = it.next();    if (!newlist.contains(ob)){        newlist.add(ob);    }}return newlist;

}

ArrayList

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