diff --git a/src/main/java/resolved/bit/Code_PrintBinary.java b/src/main/java/resolved/bit/Code_PrintBinary.java
index fac62b839184e51de134afccd7cc326805af00d7..1ea55dce950793fd2b798f3974106d26fed8f907 100644
--- a/src/main/java/resolved/bit/Code_PrintBinary.java
+++ b/src/main/java/resolved/bit/Code_PrintBinary.java
@@ -6,37 +6,35 @@ package resolved.bit;
 // 2. 除去最高位，其他位数取反以后，再加1
 public class Code_PrintBinary {
     // 打印一个32位整数的二进制形式
-    public static String printBinary(int n) {
+    public static String getBinary(int num) {
         StringBuilder sb = new StringBuilder();
         for (int i = 31; i >= 0; i--) {
-            sb.append((n & (1 << i)) == 0 ? "0" : "1");
+            sb.append(((1 << i) & num) == 0 ? "0" : "1");
         }
-        // System.out.println(sb);
         return sb.toString();
     }
 
-
     public static void main(String[] args) {
         int num = 0b10001010_11101010_10001000_11101010;
         System.out.println("要处理的数据是：");
         System.out.println("10001010111010101000100011101010");
         System.out.println("打印原始数的二进制：");
-        String printNum = printBinary(num);
-        System.out.println(printBinary(num));
+        String printNum = getBinary(num);
+        System.out.println(getBinary(num));
         System.out.println("原始内容和打印内容是否一致（如果一致则正确）" + printNum.equals(Integer.toBinaryString(num)));
         System.out.println("左移一位：");
-        printBinary(num << 1);
+        System.out.println(getBinary(num << 1));
         System.out.println(">> 表示有符号右移一位：");
-        printBinary(num >> 1);
+        System.out.println(getBinary(num >> 1));
         System.out.println(">>> 表示带着符号右移一位：");
-        printBinary(num >>> 1);
+        System.out.println(getBinary(num >>> 1));
         System.out.println("系统最大值的二进制：");
-        printBinary(Integer.MAX_VALUE);
+        System.out.println(getBinary(Integer.MAX_VALUE));
         System.out.println("系统最小值的二进制：");
-        printBinary(Integer.MIN_VALUE);
+        System.out.println(getBinary(Integer.MIN_VALUE));
         System.out.println("负的系统最小值的二进制(还是本身)：");
-        printBinary(-Integer.MIN_VALUE);
+        System.out.println(getBinary(-Integer.MIN_VALUE));
         System.out.println("取反：");
-        printBinary(~num);
+        System.out.println(getBinary(~num));
     }
 }