Ambilight + Hue in Java with minimal footprint

package de.softfun.hue;

import java.awt.Color;
import java.io.IOException;
import java.util.Locale;
import org.apache.http.HttpEntity;
import org.apache.http.client.entity.EntityBuilder;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class AmbiHueControl {
    HttpGet getAmbilight = new HttpGet("http://philips-tv.home:1925/1/ambilight/measured");
    HttpPut putHue = new HttpPut("http://philips-hue.home/api/raspberry/lights/1/state");

    private Color parseColor(String measured, String layer, String side, int light) {
        int layerPos = measured.indexOf(layer);
        int sidePos = measured.indexOf(side, layerPos);
        int lightPos = measured.indexOf("\"" + light + "\":", sidePos);
        String rgb = measured.substring(measured.indexOf("{", lightPos + 1), measured.indexOf("}", lightPos + 1));
        String[] parts = rgb.split(",");
        return new Color(
                Integer.parseInt(parts[0].substring(parts[0].indexOf(":") + 1)),
                Integer.parseInt(parts[1].substring(parts[1].indexOf(":") + 1)),
                Integer.parseInt(parts[2].substring(parts[2].indexOf(":") + 1))
        );
    }

    private String fetchFromTV() throws IOException {
        final CloseableHttpClient http = HttpClients.createMinimal();
        CloseableHttpResponse response = http.execute(getAmbilight);
        try {
            HttpEntity entity = response.getEntity();
            return EntityUtils.toString(entity).replaceAll("\\s+", "");
        } finally {
            response.close();
        }
    }

    private void setAmbilightColor(Color color) throws IOException {
        final CloseableHttpClient http = HttpClients.createMinimal();
        float xy[] = convertColor(color);
        String json = String.format(new Locale("en", "US"), "{\"xy\":[%f,%f]}", xy[0], xy[1]);
        putHue.setEntity(EntityBuilder.create().setText(json).build());
        CloseableHttpResponse response = http.execute(putHue);
        try {
            EntityUtils.consume(response.getEntity());
        } finally {
            response.close();
        }
    }

    private float[] convertColor(Color color) {
        float red = color.getRed() / 255f;
        float green = color.getGreen() / 255f;
        float blue = color.getBlue() / 255f;
        float x = red * 0.649926f + green * 0.103455f + blue * 0.197109f;
        float y = red * 0.234327f + green * 0.743075f + blue * 0.022598f;
        float z = red * 0.0000000f + green * 0.053077f + blue * 1.035763f;
        float[] xy = new float[2];
        xy[0] = x / (x + y + z);
        xy[1] = y / (x + y + z);
        return xy;
    }

    private void turnAmbilightOn() throws IOException {
        final CloseableHttpClient http = HttpClients.createMinimal();
        String json = "{\"on\":true,\"bri\":254}";
        putHue.setEntity(EntityBuilder.create().setText(json).build());
        CloseableHttpResponse response = http.execute(putHue);
        try {
            EntityUtils.consume(response.getEntity());
        } finally {
            response.close();
        }
    }

    private void turnAmbilightOff() throws IOException {
        final CloseableHttpClient http = HttpClients.createMinimal();
        String json = "{\"on\":false}";
        putHue.setEntity(EntityBuilder.create().setText(json).build());
        CloseableHttpResponse response = http.execute(putHue);
        try {
            EntityUtils.consume(response.getEntity());
        } finally {
            response.close();
        }
    }

    @SuppressWarnings("SleepWhileInLoop")
    public static void main(String[] args) throws IOException, InterruptedException {
        AmbiHueControl control = new AmbiHueControl();
        try {
            control.turnAmbilightOn();
            Thread.sleep(100);
            while (true) {
                long time = System.currentTimeMillis();
                String measured = control.fetchFromTV();
                Color color = control.parseColor(measured, "layer1", "left", 0);
                control.setAmbilightColor(color);
                // System.out.println("Worked for " + (System.currentTimeMillis()-time) + " milliseconds...");
                while (time + 125 > System.currentTimeMillis()) {
                    Thread.sleep(25);
                }
            }
        } finally {
            control.turnAmbilightOff();
        }
    }
}