23 lines
853 B
Scala
23 lines
853 B
Scala
object UTF8EncodeAndDecode extends App {
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val codePoints = Seq(0x0041, 0x00F6, 0x0416, 0x20AC, 0x1D11E)
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def utf8Encode(codepoint: Int): Array[Byte] =
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new String(Array[Int](codepoint), 0, 1).getBytes(StandardCharsets.UTF_8)
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def utf8Decode(bytes: Array[Byte]): Int =
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new String(bytes, StandardCharsets.UTF_8).codePointAt(0)
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println("Char Name Unicode UTF-8 Decoded")
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for (codePoint <- codePoints) {
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val w = if (Character.isBmpCodePoint(codePoint)) 4 else 5 // Compute spacing
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val bytes = utf8Encode(codePoint)
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def leftAlignedHex = f"U+${codePoint}%04X"
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val s = new StringBuilder()
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bytes.foreach(byte => s ++= "%02X ".format(byte))
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printf(s"%-${w}c %-36s %-7s %-${16 - w}s%c%n",
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codePoint, Character.getName(codePoint), leftAlignedHex, s, utf8Decode(bytes))
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}
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