常用的List集合, 可以使用下面几种方式进行遍历
参考代码
import java.util.ArrayListimport java.util.Iterator
public class Test {
public static void main(String[] args) {
ArrayList<Integer> list = new ArrayList<Integer>()
list.add(5)
list.add(8)
list.add(9)
//方案一 推荐 .简洁
for (Integer e : list) {
System.out.print(e + ",")
}
//方案二
for (int i = 0 i < list.size() i++) {
System.out.println(list.get(i))
}
//方案三
Iterator<Integer> it = list.iterator()
while (it.hasNext()) {
System.out.println(it.next())
}
}
}
List<String> list = new ArrayList<String>()list.add("luojiahui")
list.add("luojiafeng")
//方法1
Iterator it1 = list.iterator()
while(it1.hasNext()){
System.out.println(it1.next())
}
//方法2
for(Iterator it2 = list.iterator()it2.hasNext()){
System.out.println(it2.next())
}
//方法3
for(String tmp:list){
System.out.println(tmp)
}
//方法4
for(int i = 0i < list.size() i ++){
System.out.println(list.get(i))
}