修正JRE和JDK判断问题：有javac的才是jdk

Author: AMagicPear

PCL2.Neo/Models/Minecraft/Java/JavaData.cs

@@ -84,10 +84,10 @@ public bool IsJre
                     return _isJre.Value;
                 }
 
-                var result = File.Exists(System.IO.Path.Combine(Path,
+                var hasJavac = File.Exists(System.IO.Path.Combine(Path,
                     RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? "javac.exe" : "javac"));
-                _isJre = result;
-                return result;
+                _isJre = !hasJavac;
+                return _isJre.Value;
             }
         }
 

PCL2.Neo/Views/MainWindow.axaml

@@ -231,7 +231,7 @@
                                     Name="TestLoading"
                                     Width="150" />
                                 <pc:MyButton Height="50" Margin="10" />
-                                <pc:MyButton Height="50" Margin="10" />
+                                <pc:MyButton Height="50" Margin="10" Text="搜索 Java" Click="Search_Java_Button"/>
                                 <pc:MyCard Margin="10" />
                             </StackPanel>
                         </ScrollViewer>

PCL2.Neo/Views/MainWindow.axaml.cs

@@ -7,7 +7,9 @@
 using PCL2.Neo.Animations.Easings;
 using PCL2.Neo.Controls;
 using PCL2.Neo.Helpers;
+using PCL2.Neo.Models.Minecraft.Java;
 using System;
+using System.Linq;
 using System.Threading.Tasks;
 
 namespace PCL2.Neo.Views;
@@ -77,4 +79,27 @@ private void Button2_OnClick(object? sender, RoutedEventArgs e)
     {
         this.TestLoading.State = MyLoading.LoadingState.Error;
     }
+
+    private async void Search_Java_Button(object? sender, RoutedEventArgs e)
+    {
+        try
+        {
+            var javas = await Java.SearchJava();
+            Console.WriteLine($"找到 {javas.Count()} 个Java环境:");
+
+            foreach (var java in javas)
+            {
+                Console.WriteLine("----------------------");
+                Console.WriteLine($"路径: {java.Path}");
+                Console.WriteLine($"版本: Java {java.Version}");
+                Console.WriteLine($"位数: {(java.Is64Bit ? "64位" : "32位")}");
+                Console.WriteLine($"类型: {(java.IsJre ? "JRE" : "JDK")}");
+                Console.WriteLine($"可用: {java.IsUsable}");
+            }
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"搜索失败: {ex.Message}");
+        }
+    }
 }