diff --git a/docs/dataStructures-algorithms/几道常见的子符串算法题.md b/docs/dataStructures-algorithms/几道常见的子符串算法题.md
index 938f4a48..c85c1b74 100644
--- a/docs/dataStructures-algorithms/几道常见的子符串算法题.md
+++ b/docs/dataStructures-algorithms/几道常见的子符串算法题.md
@@ -112,7 +112,7 @@ public class Main {
 	public static String replaceSpace(String[] strs) {
 
 		// 如果检查值不合法及就返回空串
-		if (!chechStrs(strs)) {
+		if (!checkStrs(strs)) {
 			return "";
 		}
 		// 数组长度
@@ -135,21 +135,17 @@ public class Main {
 
 	}
 
-	private static boolean chechStrs(String[] strs) {
-		boolean flag = false;
-		// 注意：=是赋值，==是判断
-		if (strs != null) {
-			// 遍历strs检查元素值
-			for (int i = 0; i < strs.length; i++) {
-				if (strs[i] != null && strs[i].length() != 0) {
-					flag = true;
-				} else {
-					flag = false;
-				}
-			}
-		}
-		return flag;
-	}
+	private static boolean checkStrs(String[] strs) {
+            if (strs != null) {
+                // 遍历strs检查元素值
+                for (int i = 0; i < strs.length; i++) {
+                    if (strs[i] == null || strs[i].length() == 0) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
 
 	// 测试
 	public static void main(String[] args) {