From 20932dcfcb3e2ed8bb105d83fc056d4ddcbf3297 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sat, 14 Mar 2026 10:42:08 +0800
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---
 .../inmind/functional_interface02/Demo08.java | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 javaSE-day07/src/com/inmind/functional_interface02/Demo08.java

diff --git a/javaSE-day07/src/com/inmind/functional_interface02/Demo08.java b/javaSE-day07/src/com/inmind/functional_interface02/Demo08.java
new file mode 100644
index 0000000..e8db050
--- /dev/null
+++ b/javaSE-day07/src/com/inmind/functional_interface02/Demo08.java
@@ -0,0 +1,45 @@
+package com.inmind.functional_interface02;
+
+import java.util.function.Predicate;
+
+/*
+12.常用的函数式接口_Predicate
+Interface Predicate<T>
+boolean test(T t) 用来判断或者筛选数据
+Predicate函数式接口的作用：用来进行数据筛选，判断指定的数据是否符合业务
+
+什么时候要使用Predicat呢？？
+当我们要定义一个有一个参数，并且返回值类型为boolean的函数式接口时，直接使用Predicate
+
+需求：使用Predicate接口判断指定的字符串长度是否>3  ,(包含java)
+ */
+public class Demo08 {
+    public static void main(String[] args) {
+        /*boolean result = method(new Predicate<String>() {
+            @Override
+            public boolean test(String s) {
+                *//*if (s.length() > 3) {
+                    return true;
+                } else {
+                    return false;
+                } *//*
+                return s.length() > 3;
+            }
+        }, "woaijava");*/
+
+        //--------------------使用函数式编程思想优化代码，重点关注做什么，而不是怎么做---------------------
+//        boolean result = method((String s)->{return s.length()>3;},"woaijava");
+        boolean result = method(s-> s.length()>3,"woaijava");
+
+        boolean result1 = method((String s)->{return s.contains("java");},"woaijaa");
+
+        System.out.println("是否满足长度大于3条件："+result);
+        System.out.println("是否满足包含java："+result1);
+    }
+
+    //定义出一个返回值为boolean，参数是Predicate接口，String的数据的方法
+    public static boolean method(Predicate<String> predicate, String s) {
+        boolean result = predicate.test(s);
+        return result;
+    }
+}