Wrong charset (CP1251 encoded as UTF-8) data loss

EncodingTest.java

package test;

import org.junit.Test;

import java.io.UnsupportedEncodingException;
import java.util.Arrays;

import static org.junit.Assert.assertNotEquals;

public class EncodingTest {

    @Test
    public void dataLoss() throws UnsupportedEncodingException {
        String utf8 = "іиы";
        System.out.println( Arrays.toString( utf8.getBytes( "utf-8" ) ) );
        System.out.println( Arrays.toString( utf8.getBytes( "cp1251" ) ) );

        String cp1251 = new String( utf8.getBytes( "cp1251" ), "utf-8" );
        System.out.println( Arrays.toString( cp1251.getBytes( "utf-8" ) ) );
        System.out.println( Arrays.toString( cp1251.getBytes( "cp1251" ) ) );

        String original = new String( cp1251.getBytes( "cp1251" ), "utf-8" );
        System.out.println( Arrays.toString( original.getBytes( "utf-8" ) ) );
        System.out.println( Arrays.toString( original.getBytes( "cp1251" ) ) );

        assertNotEquals( utf8, original );
    }
}