51 lines
1.7 KiB
Java
51 lines
1.7 KiB
Java
import scala.Tuple2;
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import scala.collection.concurrent.TrieMap;
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import scala.collection.immutable.HashSet;
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import scala.collection.mutable.ArrayBuffer;
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public class Collections {
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public static void main(String[] args) {
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ArrayBuffer<Integer> myarrlist = new ArrayBuffer<Integer>();
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ArrayBuffer<Integer> myarrlist2 = new ArrayBuffer<Integer>(20);
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myarrlist.$plus$eq(new Integer(42)); // $plus$eq is Scala += operator
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myarrlist.$plus$eq(13); // to add an element.
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myarrlist.$plus$eq(-1);
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myarrlist2 = (ArrayBuffer<Integer>) myarrlist2.$minus(-1);
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for (int i = 0; i < 10; i++)
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myarrlist2.$plus$eq(i);
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// loop through myarrlist to sum each entry
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int sum = 0;
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for (int i = 0; i < myarrlist2.size(); i++) {
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sum += myarrlist2.apply(i);
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}
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System.out.println("List is: " + myarrlist2 + " with head: "
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+ myarrlist2.head() + " sum is: " + sum);
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System.out.println("Third element is: " + myarrlist2.apply$mcII$sp(2));
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Tuple2<String, String> tuple = new Tuple2<String, String>("US",
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"Washington");
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System.out.println("Tuple2 is : " + tuple);
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ArrayBuffer<Tuple2<String, String>> capList = new ArrayBuffer<Tuple2<String, String>>();
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capList.$plus$eq(new Tuple2<String, String>("US", "Washington"));
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capList.$plus$eq(new Tuple2<String, String>("France", "Paris"));
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System.out.println(capList);
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TrieMap<String, String> trieMap = new TrieMap<String, String>();
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trieMap.put("US", "Washington");
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trieMap.put("France", "Paris");
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HashSet<Character> set = new HashSet<Character>();
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ArrayBuffer<Tuple2<String, String>> capBuffer = new ArrayBuffer<Tuple2<String, String>>();
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trieMap.put("US", "Washington");
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System.out.println(trieMap);
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}
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}
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