chore: add Apache 2.0 license headers to all Java files

Author: WhatDamon

src/client/java/org/damon233/performtrackermod/PerformTrackerClient.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2026 Damon Lu and open-source contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.damon233.performtrackermod;
 
 import net.fabricmc.api.ClientModInitializer;

src/client/java/org/damon233/performtrackermod/collector/ClientGpuCollector.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2026 Damon Lu and open-source contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.damon233.performtrackermod.collector;
 
 import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientTickEvents;

src/client/java/org/damon233/performtrackermod/collector/ClientMetricsCollector.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2026 Damon Lu and open-source contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.damon233.performtrackermod.collector;
 
 import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientTickEvents;

src/client/java/org/damon233/performtrackermod/config/ClothConfigScreen.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2026 Damon Lu and open-source contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.damon233.performtrackermod.config;
 
 import me.shedaniel.clothconfig2.api.ConfigBuilder;

src/client/java/org/damon233/performtrackermod/config/PerformTrackerModMenuIntegration.java

@@ -1,13 +1,25 @@
+/*
+ * Copyright 2026 Damon Lu and open-source contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.damon233.performtrackermod.config;
 
 import com.terraformersmc.modmenu.api.ConfigScreenFactory;
 import com.terraformersmc.modmenu.api.ModMenuApi;
 import net.minecraft.client.gui.screen.Screen;
 
-/**
- * Mod Menu integration for PerformTracker.
- * Provides a config screen accessible from the Mod Menu.
- */
 public class PerformTrackerModMenuIntegration implements ModMenuApi {
 
     @Override

src/main/java/org/damon233/performtrackermod/PerformTracker.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2026 Damon Lu and open-source contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.damon233.performtrackermod;
 
 import net.fabricmc.api.ModInitializer;

src/main/java/org/damon233/performtrackermod/collector/CpuMetrics.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2026 Damon Lu and open-source contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.damon233.performtrackermod.collector;
 
 import java.lang.management.ManagementFactory;

src/main/java/org/damon233/performtrackermod/collector/IFpsProvider.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2026 Damon Lu and open-source contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.damon233.performtrackermod.collector;
 
 public interface IFpsProvider {

src/main/java/org/damon233/performtrackermod/collector/IGpuProvider.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2026 Damon Lu and open-source contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.damon233.performtrackermod.collector;
 
 public interface IGpuProvider {

src/main/java/org/damon233/performtrackermod/collector/ServerMetricsCollector.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2026 Damon Lu and open-source contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.damon233.performtrackermod.collector;
 
 public class ServerMetricsCollector {