Intermediate Java(5)- ArrayList Program

import java.util.*;

public class apples{

public static void main(String[] args){

String[] things={"eggs","lasers","hats","pie"};

List<String> list1 = new ArrayList<String>();

for(String x:things)

list1.add(x);

String[] morethings = {"lasers","hats"};

List<String> list2 = new ArrayList<String>();

for (String y:morethings)

list2.add(y);

//打印list1

for(int i=0;i<list1.size();i++){

System.out.printf("%s ", list1.get(i));

}

editlist(list1,list2); → 調用函數editlist()

System.out.println();

//再次打印list1

for(int i=0;i<list1.size();i++){

System.out.printf("%s ", list1.get(i));

}

}

public static void editlist(Collection<String> l1,Collection<String> l2){

Iterator<String> it = l1.iterator(); → Iterator=檢查每個列表(List)項目(item)

while(it.hasNext()){ → 通過循環直到列表(list)的末尾

if(l2.contains(it.next())) → 如果清單2中有清單1的內容

it.remove(); → 就刪除該相同的內容

}

}

}

這是運行時的結果:

eggs lasers hats pie

eggs pie