Added toString() to most Selectors as requested by #34

src/main/java/com/github/markusbernhardt/proxy/selector/direct/NoProxySelector.java

@@ -65,6 +65,10 @@ public List<Proxy> select(URI uri) {
 		return ProxyUtil.noProxyList();
 	}
 
+	@Override
+	public String toString() {
+		return "NoProxySelector{}";
+	}
 }
 
 /*

src/main/java/com/github/markusbernhardt/proxy/selector/fixed/FixedProxySelector.java

@@ -73,4 +73,10 @@ public List<Proxy> select(URI uri) {
 		return this.proxyList;
 	}
 
+	@Override
+	public String toString() {
+		return "FixedProxySelector{" +
+				"proxyList=" + proxyList +
+				'}';
+	}
 }

src/main/java/com/github/markusbernhardt/proxy/selector/misc/BufferedProxySelector.java

@@ -50,6 +50,17 @@ public enum CacheScope {
 		CACHE_SCOPE_URL
 	}
 
+	@Override
+	public String toString() {
+		return "BufferedProxySelector{" +
+				"delegate=" + delegate +
+				", cache=" + cache +
+				", maxSize=" + maxSize +
+				", ttl=" + ttl +
+				", cacheScope=" + cacheScope +
+				'}';
+	}
+
 	private ProxySelector delegate;
 
 	private ConcurrentHashMap<String, CacheEntry> cache;

src/main/java/com/github/markusbernhardt/proxy/selector/misc/ProtocolDispatchSelector.java

@@ -135,4 +135,11 @@ public int size() {
     return this.selectors.size();
   }
 
+	@Override
+	public String toString() {
+		return "ProtocolDispatchSelector{" +
+				"selectors=" + selectors +
+				", fallbackSelector=" + fallbackSelector +
+				'}';
+	}
 }

src/main/java/com/github/markusbernhardt/proxy/selector/misc/ProxyListFallbackSelector.java

@@ -168,4 +168,12 @@ final void setRetryAfterMs(long retryAfterMs) {
 		this.retryAfterMs = retryAfterMs;
 	}
 
+	@Override
+	public String toString() {
+		return "ProxyListFallbackSelector{" +
+				"delegate=" + delegate +
+				", failedDelayCache=" + failedDelayCache +
+				", retryAfterMs=" + retryAfterMs +
+				'}';
+	}
 }

src/main/java/com/github/markusbernhardt/proxy/selector/whitelist/ProxyBypassListSelector.java

@@ -72,6 +72,14 @@ public void connectFailed(URI uri, SocketAddress sa, IOException ioe) {
 		this.delegate.connectFailed(uri, sa, ioe);
 	}
 
+	@Override
+	public String toString() {
+		return "ProxyBypassListSelector{" +
+				"delegate=" + delegate +
+				", whiteListFilter=" + whiteListFilter +
+				'}';
+	}
+
 	/*************************************************************************
 	 * select
 	 * 

src/main/java/com/github/markusbernhardt/proxy/selector/whitelist/UseProxyWhiteListSelector.java

@@ -79,4 +79,11 @@ public List<Proxy> select(URI uri) {
 		return ProxyUtil.noProxyList();
 	}
 
+	@Override
+	public String toString() {
+		return "UseProxyWhiteListSelector{" +
+				"delegate=" + delegate +
+				", whiteListFilter=" + whiteListFilter +
+				'}';
+	}
 }