Let's add -Xlint:unchecked to build.gradle

You can see that -Xlint:deprecated is also there, but commented out.
Mostly because I'm not prepared to fix them all just now.  :)

build.gradle

@@ -12,7 +12,7 @@ apply plugin: 'application'
 ext {
 	sourceCompatibility = '1.8'
 	targetCompatibility = '1.8'
-	
+
 	swtVersion = "4.6.1"
 	junitVersion = "4.12"
 	antVersion = "1.8.2"
@@ -43,6 +43,11 @@ dependencies {
     testCompile "junit:junit:$junitVersion"
 }
 
+compileJava {
+    options.encoding = 'UTF-8'
+    options.compilerArgs << "-Xlint:unchecked" // << "-Xlint:deprecation"
+}
+
 task acJar(type: Jar) {
 	dependencies {
 		// Just to pass the compile step; these classes are stripped out below.
@@ -104,4 +109,4 @@ artifacts {
     archives linuxJar
     archives macosxJar
     archives windowsJar
-}
+}