diff --git a/javaSE-day07/src/com/inmind/functional_interface02/Demo09.java b/javaSE-day07/src/com/inmind/functional_interface02/Demo09.java
new file mode 100644
index 0000000..29f3b29
--- /dev/null
+++ b/javaSE-day07/src/com/inmind/functional_interface02/Demo09.java
@@ -0,0 +1,40 @@
+package com.inmind.functional_interface02;
+
+import java.util.function.Predicate;
+
+/*
+Predicate的and方法
+
+default Predicate<T> and(Predicate<? super T> other)
+返回一个组合的谓词，表示该谓词与另一个谓词的短路逻辑AND  &&。
+
+需求：对一个字符串，使用2个predicate，判断它是否以h开头，它的长度是否大于3
+
+boolean test(T)
+ */
+public class Demo09 {
+    public static void main(String[] args) {
+        /*method((String s)->{return s.startsWith("h");},
+                (String s)->{return s.length() >3;},
+                "helloworld");*/
+
+        method( s-> s.startsWith("h"),
+                (String s)->{return s.length() >3;},
+                "helloworld");
+
+    }
+
+    //定义一个方法，接收2个判断条件predicate，1个要判断的字符串，没有返回值
+    public static void method(Predicate<String> predicate1, Predicate<String> predicate2, String str) {
+        /*boolean result1 = predicate1.test(str);
+        boolean result2 = predicate2.test(str);
+        boolean result = result1&&result2;*/
+
+//        boolean result = predicate1.test(str)&&predicate2.test(str);
+        Predicate<String> newPredicate = predicate1.and(predicate2);
+        boolean result = newPredicate.test(str);
+
+        System.out.println("最终结果："+result);
+    }
+
+}