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23 
24 /**
25  * @test
26  * @bug 6992121
27  * @summary Test the ArrayList.ensureCapacity() and Vector.ensureCapacity
28  *    method with negative minimumCapacity input argument.
29  */
30 
31 package test.java.util.ArrayList;
32 
33 import java.util.ArrayList;
34 import java.util.Vector;
35 
36 public class EnsureCapacity {
37 
main(String[] args)38     public static void main(String[] args) {
39         testArrayList();
40         testVector();
41     }
42 
checkCapacity(int before, int after)43     private static void checkCapacity(int before, int after) {
44         if (before != after) {
45             throw new RuntimeException("capacity is expected to be unchanged: " +
46                 "before=" + before + " after=" + after);
47         }
48     }
49 
testArrayList()50     private static void testArrayList() {
51         ArrayList<String> al = new ArrayList<String>();
52         al.add("abc");
53         al.ensureCapacity(Integer.MIN_VALUE);
54 
55         // there is no method to query the capacity of ArrayList
56         // so before and after capacity are not checked
57     }
58 
testVector()59     private static void testVector() {
60         Vector<String> vector = new Vector<String>();
61         vector.add("abc");
62 
63         int cap = vector.capacity();
64         vector.ensureCapacity(Integer.MIN_VALUE);
65         checkCapacity(cap, vector.capacity());
66     }
67 }
68