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54
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1 package jungle.test.functionalJava;
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2
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3 import java.util.Iterator;
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4
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5 import fj.P2;
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6 import fj.data.List;
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7
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8 public class ListTest{
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9
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10 public static void main(String[] args) {
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11 List<Integer> list = List.nil();
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12 list = list.cons(1);
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13 list = list.cons(2);
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14 list = list.cons(4);
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15 System.out.println("list :"+list);
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16 System.out.println("list.index(0) :"+list.index(0));
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17 System.out.println("list.head() :"+ list.head());
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18 System.out.println("list.tail() :"+list.tail());
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19 System.out.println("list.splitAt(2)");
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20 P2<List<Integer>, List<Integer>> p2 = list.splitAt(2);
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21 List<Integer> list1 = p2._1();
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22 List<Integer> list2 = p2._2();
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23 System.out.println(list1);
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24 System.out.println(list2);
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25
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26 final int INSERT_NUM = 3;
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27 list = insertInteger(list, INSERT_NUM);
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28 System.out.println("newList :"+ list);
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29 }
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30
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31 public static List<Integer> insertInteger(List<Integer> list, final int insertNum) {
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32 int count = 0;
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33 for(Iterator<Integer> iter = list.iterator(); iter.hasNext();){
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34 int num = iter.next();
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35 if(insertNum > num ) {
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36 break;
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37 }
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38 count++;
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39 }
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40 P2<List<Integer>, List<Integer>> p2 = list.splitAt(count);
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41 List<Integer> newList = List.nil();
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42 newList = p2._2().cons(insertNum);
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43 newList = p2._1().append(newList);
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44 return newList;
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45 }
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46
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47
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48 }
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