import java.util.*; public class ContainerTest {
public static void main(String[] args) {
List <String> firstList = new ArrayList <String>();
firstList.add("list1 - No.1");
firstList.add("list1 - No.2");
List <firstList> secondList = new ArrayList <firstList>(); //error: firstList cannot be resolved to a type.
secondList.add(firstList);
for(List <firstList> list : secondList) { //error: firstList cannot be resolved to a type.
for(List <String> str : list) {
System.out.println(str);
}
}
}
}
怎么用iterator输出啊,
public static void main(String[] args) {
List <String> firstList = new ArrayList <String>();
firstList.add("list1 - No.1");
firstList.add("list1 - No.2");
List <firstList> secondList = new ArrayList <firstList>(); //error: firstList cannot be resolved to a type.
secondList.add(firstList);
for(List <firstList> list : secondList) { //error: firstList cannot be resolved to a type.
for(List <String> str : list) {
System.out.println(str);
}
}
}
}
怎么用iterator输出啊,
import java.util.*;public class ContainerTest
{
public static void main(String[] args)
{
List <String> firstList = new ArrayList <String>();
firstList.add("list1 - No.1");
firstList.add("list1 - No.2");
List <String> secondList = new ArrayList <String>();
secondList.addAll(firstList);
for(String str : secondList)
System.out.println(str);
}
}
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;public class IteratorTest {
public static void main(String[] args) {
List firstList = new ArrayList ();
firstList.add("list1 - No.1");
firstList.add("list1 - No.2");
List secondList = new ArrayList ();
secondList.add(firstList);
Iterator it = secondList.iterator();
while(it.hasNext()){
System.out.println(it.next());
}
}
}