Use license-gradle-plugin

build.gradle

@@ -1,37 +1,21 @@
-/*
- * Hello Minecraft! Launcher.
- * Copyright (C) 2018  huangyuhui <huanghongxun2008@126.com>
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see {http://www.gnu.org/licenses/}.
- */
+buildscript {
+    repositories {
+        jcenter()
+        maven { url 'https://plugins.gradle.org/m2/' }
+    }
+    dependencies {
+        classpath 'org.tukaani:xz:1.8'
+        classpath 'gradle.plugin.com.hierynomus.gradle.plugins:license-gradle-plugin:0.15.0'
+    }
+}
 
 group 'org.jackhuang'
 version '3.0'
 
-buildscript {
-    repositories {
-        jcenter()
-    }
-    dependencies {
-        classpath 'org.tukaani:xz:1.8'
-    }
-}
-
-
 subprojects {
     apply plugin: 'java'
     apply plugin: 'idea'
+    apply plugin: 'com.github.hierynomus.license'
 
     repositories {
         mavenCentral()
@@ -40,7 +24,7 @@ subprojects {
         maven { url 'https://jitpack.io' }
     }
 
-	sourceCompatibility = 1.8
+    sourceCompatibility = 1.8
     compileJava.options.encoding = "UTF-8"
     compileTestJava.options.encoding = "UTF-8"
 
@@ -54,4 +38,9 @@ subprojects {
         testCompile group: 'junit', name: 'junit', version: '4.12'
     }
 
+    license {
+        header rootProject.file('license-header.txt')
+        strictCheck true
+        ext.year = Calendar.getInstance().get(Calendar.YEAR)
+    }
 }

license-header.txt

@@ -0,0 +1,15 @@
+Hello Minecraft! Launcher
+Copyright (C) ${year}  huangyuhui <huanghongxun2008@126.com> and contributors
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.