添加位运算

byhieg · byhieg · commit 903f4676c165 · 2017-06-27T13:32:05.000+08:00
diff --git a/src/main/java/cn/byhieg/bitoperatetutorial/BitOperate.java b/src/main/java/cn/byhieg/bitoperatetutorial/BitOperate.java
@@ -0,0 +1,14 @@
+package cn.byhieg.bitoperatetutorial;
+
+/**
+ * Created by byhieg on 2017/6/27.
+ * Mail to byhieg@gmail.com
+ */
+public class BitOperate {
+
+
+    public String getRightestOne(int n){
+        int res = n & (~n + 1);
+        return Integer.toBinaryString(res);
+    }
+}
diff --git a/src/test/java/cn/byhieg/bitoperatetutorialtest/BitOperateTest.java b/src/test/java/cn/byhieg/bitoperatetutorialtest/BitOperateTest.java
@@ -0,0 +1,23 @@
+package cn.byhieg.bitoperatetutorialtest;
+
+import cn.byhieg.bitoperatetutorial.BitOperate;
+import junit.framework.TestCase;
+
+/**
+ * Created by byhieg on 2017/6/27.
+ * Mail to byhieg@gmail.com
+ */
+public class BitOperateTest extends TestCase {
+
+    BitOperate bitOperate;
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+        bitOperate = new BitOperate();
+    }
+
+    public void testGetRightestOne() throws Exception {
+        assertEquals(bitOperate.getRightestOne(Integer.valueOf("100100",2)),"100");
+    }
+
+}
