JAVA日报

arraylist 遍历方法
public static void function(){
        ArrayList<String>  name= new ArrayList<>();
        name.add("？？？")；
        for (int i = 0; i < name.size(); i++) {
            System.out.println(name.get(i));
        }
    }

public static void foreach(){
ArrayList<String> name= new ArrayList<>();
name.add("？？？？");
for (String string : name) {
System.out.println(string);
}
}

public static void useIterator(){
ArrayList<String> name= new ArrayList<>();
name.add("？？？？");
Iterator<String> it=name.iterator();
while(it.hasNext()){
System.out.println(it.next());
}
}

public static void foreach(){
ArrayList<Integer> list =new ArrayList<>();
list.add(1);
ListIterator<Integer>it=list.listIterator();

while(it.hasNext()){
System.out.println(it.next());
}
}