Insert files related to eclipse project to gitignore

This closes #1446
diff --git a/.gitignore b/.gitignore
index 8f1879e..ee6ab9e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,6 +24,7 @@
 tags
 
 .*project
+.classpath
 junit*.properties
 .idea
 gen-*
@@ -222,6 +223,7 @@
 /lib/haxe/test/bin
 /lib/hs/dist
 /lib/java/build
+/lib/java/target
 /lib/js/dist
 /lib/js/doc
 /lib/js/package-lock.json