Improve Duration.toMillis() (#1132)

* Improve java doc for toMillis().

* Make toMillis() non-static.

1 files changed, 7 insertions, 7 deletions

diff --git a/api/src/test/java/io/opencensus/common/DurationTest.java b/api/src/test/java/io/opencensus/common/DurationTest.java
index d46f2f7a..fb5f314e 100644
--- a/api/src/test/java/io/opencensus/common/DurationTest.java
+++ b/api/src/test/java/io/opencensus/common/DurationTest.java
@@ -91,12 +91,12 @@ public class DurationTest {
 
   @Test
   public void toMillis() {
-    assertThat(Duration.toMillis(Duration.create(10, 0))).isEqualTo(10000L);
-    assertThat(Duration.toMillis(Duration.create(10, 1000))).isEqualTo(10000L);
-    assertThat(Duration.toMillis(Duration.create(0, (int) 1e6))).isEqualTo(1L);
-    assertThat(Duration.toMillis(Duration.create(0, 0))).isEqualTo(0L);
-    assertThat(Duration.toMillis(Duration.create(-10, 0))).isEqualTo(-10000L);
-    assertThat(Duration.toMillis(Duration.create(-10, -1000))).isEqualTo(-10000L);
-    assertThat(Duration.toMillis(Duration.create(0, -(int) 1e6))).isEqualTo(-1L);
+    assertThat(Duration.create(10, 0).toMillis()).isEqualTo(10000L);
+    assertThat(Duration.create(10, 1000).toMillis()).isEqualTo(10000L);
+    assertThat(Duration.create(0, (int) 1e6).toMillis()).isEqualTo(1L);
+    assertThat(Duration.create(0, 0).toMillis()).isEqualTo(0L);
+    assertThat(Duration.create(-10, 0).toMillis()).isEqualTo(-10000L);
+    assertThat(Duration.create(-10, -1000).toMillis()).isEqualTo(-10000L);
+    assertThat(Duration.create(0, -(int) 1e6).toMillis()).isEqualTo(-1L);
   }
 }