com.feilong.core.text.NumberFormatUtilTest 在 jdk8 下面测试不通过

[venusdrogon]

com.feilong.core.text.NumberFormatUtilTest在jdk7 下可以测试通过, 但是 jdk8下测试不通过

代码如下:

   /**
     * Test format 32.
     */
    @Test
    public void testFormat32(){
        assertEquals("1.2", NumberFormatUtil.format(1.15, "#####.#", RoundingMode.HALF_EVEN));
        assertEquals("1.2", NumberFormatUtil.format(1.25, "#####.#", RoundingMode.HALF_EVEN));
        assertEquals("1.3", NumberFormatUtil.format(1.251, "#####.#", RoundingMode.HALF_EVEN));

        assertEquals("-1.2", NumberFormatUtil.format(-1.15, "#####.#", RoundingMode.HALF_EVEN));
        assertEquals("-1.2", NumberFormatUtil.format(-1.25, "#####.#", RoundingMode.HALF_EVEN));
        assertEquals("-1.3", NumberFormatUtil.format(-1.251, "#####.#", RoundingMode.HALF_EVEN));
    }

    /**
     * Test format 321.
     */
    @Test
    public void testFormat321(){
        assertEquals("1.2", NumberFormatUtil.format(1.15, "#####.#", null));
        assertEquals("1.3", NumberFormatUtil.format(1.25, "#####.#", null));
        assertEquals("1.3", NumberFormatUtil.format(1.251, "#####.#", null));

        assertEquals("-1.2", NumberFormatUtil.format(-1.15, "#####.#", null));
        assertEquals("-1.3", NumberFormatUtil.format(-1.25, "#####.#", null));
        assertEquals("-1.3", NumberFormatUtil.format(-1.251, "#####.#", null));
    }

    /**
     * Test format 111.
     */
    @Test
    public void testFormat111(){
        assertEquals("1.2", NumberFormatUtil.format(1.15, "#####.#"));
        assertEquals("1.3", NumberFormatUtil.format(1.25, "#####.#"));
        assertEquals("1.3", NumberFormatUtil.format(1.251, "#####.#"));

        assertEquals("-1.2", NumberFormatUtil.format(-1.15, "#####.#"));
        assertEquals("-1.3", NumberFormatUtil.format(-1.25, "#####.#"));
        assertEquals("-1.3", NumberFormatUtil.format(-1.251, "#####.#"));
    }

jdk8 测试运行结果:

jdk8 版本信息

java version "1.8.0_45"

[venusdrogon]

经过搜索 发现

https://bugs.openjdk.java.net/browse/JDK-7131459
https://bugs.openjdk.java.net/browse/JDK-8029896

http://stackoverflow.com/questions/22797964/is-inconsistency-in-rounding-between-java-7-and-java-8-a-bug

jdk7上是bug ,

jdk8 修复了

[venusdrogon]

写了篇文章,参见

一个JDK7的四舍五入的bug引发的思考
https://github.com/venusdrogon/feilong-core/wiki/one-jdk7-bug-thinking