Add java tutorial placehoder

Flouse · Flouse · commit 8ef4a43fd3f2 · 2023-05-05T07:58:25.000Z
## Reference - Construct and Send Your First CKB Transaction https://blog.cryptape.com/construct-and-send-your-first-ckb-transaction
diff --git a/java/README.md b/java/README.md
@@ -0,0 +1,3 @@
+## Reference
+- Construct and Send Your First CKB Transaction
+  https://blog.cryptape.com/construct-and-send-your-first-ckb-transaction

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+## Reference`
	`2`	`+- Construct and Send Your First CKB Transaction`
	`3`	`+ https://blog.cryptape.com/construct-and-send-your-first-ckb-transaction`