package Demo01;
import java.util.ArrayList;
import java.util.Collection;
public class demo02 {
public static void main(String[] args) {
String[] str =new String[]{"1e21", "12q", "aqwdfqw"};
str[0] ="111";
str[1] ="222";
str[2] ="333";
str[1] = str[2];
str[2] =null;
ArrayList list =new ArrayList<>();
list.add("111");
list.add("222");
list.add("333");
list.add("444");
list.add("555");
System.out.println(list);
list.remove(1);
list.remove("444");
System.out.println(list);
list.set(2, "55555");
System.out.println(list);
for (String l : list) {
System.out.println(l +"\t");
}
System.out.println();
for (int i =0; i < list.size(); i++) {
System.out.println(list.get(i) +"\t");
}
}
}
