ValueOf.java

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/**
 * @test
 * @bug 6807702
 * @summary Basic test for Integer.valueOf
 * @run main ValueOf
 * @run main/othervm -esa -XX:+IgnoreUnrecognizedVMOptions -XX:+EliminateAutoBox
 *                   -XX:AutoBoxCacheMax=20000 ValueOf
 */

public class ValueOf {

    // test Integer.valueOf over this range (inclusive)
    private static final int TEST_LOW  = -1024;
    private static final int TEST_HIGH = 24576;

    public static void main(String[] args) {
        int i = TEST_LOW;
        while (i <= TEST_HIGH) {
            // check that valueOf stores i
            if (Integer.valueOf(i).intValue() != i)
                throw new RuntimeException();

            // check that the same object is returned for integral values
            // in the range -128 to 127 (inclusive)
            if (i >= -128 && i <= 127) {
                if (Integer.valueOf(i) != Integer.valueOf(i))
                    throw new RuntimeException();
            }

            i++;
        }
    }
}