import java.io.IOException; 
import java.io.Writer; 
import java.nio.channels.Channels; 
import java.nio.channels.FileChannel; 
import java.nio.channels.WritableByteChannel; 
import java.nio.charset.Charset; 
import java.nio.charset.CharsetEncoder; 
import java.nio.charset.CodingErrorAction; 
import java.nio.file.Files; 
import java.util.Arrays; 

public class EncoderTest 
{ 
  public static void main(String[] args) throws IOException 
  { 
    //Create dummy channel 
    WritableByteChannel channel = FileChannel.open(Files.createTempFile(null, null)); 

    //Create an UTF-8 encoder which ignores malformed input 
    Charset charset = Charset.forName("UTF-8"); 
    CharsetEncoder encoder = charset.newEncoder(); 
    encoder.onMalformedInput(CodingErrorAction.IGNORE); 

    //Create a char array which is filled with high surrogates 
    char[] charArray = new char[1024 * 1024]; 
    Arrays.fill(charArray, '\uD834'); 

    //Create encoder, encode a single char, encode remaining chars. 
    Writer enc = Channels.newWriter(channel, encoder, 1); 
    enc.write(charArray, 0, 1); 
    enc.write(charArray, 0, charArray.length); //BOOM! 
  } 
}