java.io.DataOutputStream 64KB limitation

dos_64kb_limit.scala

import java.io._

val bao = new ByteArrayOutputStream
val dos = new DataOutputStream(bao)

val chank64kMinus1 = new StringBuilder
val limit = 1024 * 64 - 1
1 to limit foreach { _ => chank64kMinus1.append("a") }
dos.writeUTF(chank64kMinus1.toString)
println(limit + " bytes is acceptable.")

val chank64k = new StringBuilder
1 to (limit + 1) foreach { _ => chank64k.append("a") }
try {
  dos.writeUTF(chank64k.toString)
} catch { case e: UTFDataFormatException => 
  e.printStackTrace
/*
java.io.UTFDataFormatException: encoded string too long: 65536 bytes
        at java.io.DataOutputStream.writeUTF(DataOutputStream.java:347)
        at java.io.DataOutputStream.writeUTF(DataOutputStream.java:306)
        at Main$$anon$1.<init>(dos_64kb_limit.scala:16)
        at Main$.main(java64kb_limit.scala:1)
        at Main.main(java64kb_limit.scala)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at scala.tools.nsc.util.ScalaClassLoader$$anonfun$run$1.apply(ScalaClassLoader.scala:78)
        at scala.tools.nsc.util.ScalaClassLoader$class.asContext(ScalaClassLoader.scala:24)
        at scala.tools.nsc.util.ScalaClassLoader$URLClassLoader.asContext(ScalaClassLoader.scala:88)
        at scala.tools.nsc.util.ScalaClassLoader$class.run(ScalaClassLoader.scala:78)
        at scala.tools.nsc.util.ScalaClassLoader$URLClassLoader.run(ScalaClassLoader.scala:101)
        at scala.tools.nsc.ObjectRunner$.run(ObjectRunner.scala:33)
        at scala.tools.nsc.ObjectRunner$.runAndCatch(ObjectRunner.scala:40)
*/
}