遍历集合List几种方式
import java.util.ArrayList;
- import java.util.Iterator;
- import java.util.List;
- /**
- *遍历集合List
- * @author 够潮
- *
- */
- public class Demo35 {
- /**
- * @param args
- */
- public static void main(String[] args) {
- List list = new ArrayList();
- list.add("gouchao");
- list.add("gouli");
- //下标
- for(int i = 0 ; i< list.size();i++){
- System.out.println(list.get(i));
- }
- //for- each
- for(Object o:list){
- System.out.println(o);
- }
- //迭代器
- Iterator it = list.iterator();
- while(it.hasNext()){
- System.out.println(it.next());
- }
- //Object数组
- Object o[];
- o = list.toArray();
- for(int i = 0 ; i <o.length;i++){
- System.out.println(o[i]);
- }
- //toString
- System.out.println(list.toString());
- }
- }