From 145ecbc6aa94b467fa9bb3ad92399f848c75ca35 Mon Sep 17 00:00:00 2001
From: NCJOAQ <2627723488@qq.com>
Date: Tue, 29 Jul 2025 20:12:51 +0800
Subject: [PATCH] =?UTF-8?q?feat(class38):=20=E6=B7=BB=E5=8A=A0=20Test3=20?=
 =?UTF-8?q?=E7=B1=BB=E5=88=9B=E5=BB=BA=E7=99=BB=E9=99=86=E7=AA=97=E5=8F=A3?=
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- 新增 Test3 类，实现了一个简单的登陆窗口
- 窗口包含一个登陆按钮，并使用 AtomicInteger 实现点击计数
- 演示了使用 lambda 表达式简化事件监听器的创建
---
 src/class38/Test3.java | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 src/class38/Test3.java

diff --git a/src/class38/Test3.java b/src/class38/Test3.java
new file mode 100644
index 0000000..ed8578c
--- /dev/null
+++ b/src/class38/Test3.java
@@ -0,0 +1,32 @@
+package class38;
+
+import javax.swing.*;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public class Test3 {
+    public static void main(String[] args) {
+        //创建一个登陆窗口，窗口上只有一个登陆按钮
+        JFrame win = new JFrame("登陆窗口");
+        win.setSize(300,200);
+        win.setLocationRelativeTo( null);
+        win.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+
+        JPanel p = new JPanel();
+        win.add(p);
+
+        JButton btn = new JButton("登陆");
+        p.add(btn);
+//        btn.addActionListener(new ActionListener() {
+//            private int count = 0;
+//            @Override
+//            public void actionPerformed(ActionEvent e) {
+//                System.out.println("登陆"+count++);
+//            }
+//        });
+        //简化
+        AtomicInteger count = new AtomicInteger();//创建一个原子类
+        btn.addActionListener((e) -> System.out.println("登陆"+(count.incrementAndGet())));
+
+        win.setVisible(true);
+    }
+}
\ No newline at end of file