34 lines
900 B
Java
34 lines
900 B
Java
import org.junit.jupiter.api.Test;
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import java.util.ArrayDeque;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Map;
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import java.util.Queue;
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import java.util.TreeSet;
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public class TestJavaCollections {
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@Test
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void test1() {
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new ArrayList<Integer>();
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new LinkedList<Integer>();
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List<Integer> a = new ArrayList<Integer>();
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a.addAll(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9));
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a.removeAll(a.subList(2, 4));
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System.out.println(a);
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Map<String, String> map = new HashMap<String, String>();
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TreeSet<Integer> set = new TreeSet<Integer>();
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set.addAll(Arrays.asList(9,4,5,7,2,3));
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System.out.println(set);
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Queue<Integer> dequeue = new ArrayDeque<>();
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Queue<Integer> queue = new LinkedList<>();
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}
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}
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