Utils: Remove toString() and toBytes() helpers, use new String() and getBytes() with Guava charsets instead.

core/src/main/java/org/bitcoinj/core/BitcoinSerializer.java

@@ -20,6 +20,8 @@ package org.bitcoinj.core;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import com.google.common.base.Charsets;
+
 import java.io.IOException;
 import java.io.OutputStream;
 import java.nio.BufferUnderflowException;
@@ -364,7 +366,7 @@ public class BitcoinSerializer extends MessageSerializer {
             for (; header[cursor] != 0 && cursor < COMMAND_LEN; cursor++) ;
             byte[] commandBytes = new byte[cursor];
             System.arraycopy(header, 0, commandBytes, 0, cursor);
-            command = Utils.toString(commandBytes, "US-ASCII");
+            command = new String(commandBytes, Charsets.US_ASCII);
             cursor = COMMAND_LEN;
 
             size = (int) readUint32(header, cursor);

core/src/main/java/org/bitcoinj/core/Message.java

@@ -20,6 +20,8 @@ package org.bitcoinj.core;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import com.google.common.base.Charsets;
+
 import java.io.*;
 import java.math.BigInteger;
 import java.util.Arrays;
@@ -347,7 +349,7 @@ public abstract class Message {
 
     protected String readStr() throws ProtocolException {
         long length = readVarInt();
-        return length == 0 ? "" : Utils.toString(readBytes((int) length), "UTF-8"); // optimization for empty strings
+        return length == 0 ? "" : new String(readBytes((int) length), Charsets.UTF_8); // optimization for empty strings
     }
 
     protected Sha256Hash readHash() throws ProtocolException {

core/src/main/java/org/bitcoinj/core/Utils.java

@@ -30,7 +30,6 @@ import org.spongycastle.crypto.digests.RIPEMD160Digest;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
-import java.io.UnsupportedEncodingException;
 import java.math.BigInteger;
 import java.net.URL;
 import java.text.DateFormat;
@@ -439,44 +438,6 @@ public class Utils {
         return result;
     }
 
-    /**
-     * Constructs a new String by decoding the given bytes using the specified charset.
-     * <p>
-     * This is a convenience method which wraps the checked exception with a RuntimeException.
-     * The exception can never occur given the charsets
-     * US-ASCII, ISO-8859-1, UTF-8, UTF-16, UTF-16LE or UTF-16BE.
-     *
-     * @param bytes the bytes to be decoded into characters
-     * @param charsetName the name of a supported {@linkplain java.nio.charset.Charset charset}
-     * @return the decoded String
-     */
-    public static String toString(byte[] bytes, String charsetName) {
-        try {
-            return new String(bytes, charsetName);
-        } catch (UnsupportedEncodingException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    /**
-     * Encodes the given string into a sequence of bytes using the named charset.
-     * <p>
-     * This is a convenience method which wraps the checked exception with a RuntimeException.
-     * The exception can never occur given the charsets
-     * US-ASCII, ISO-8859-1, UTF-8, UTF-16, UTF-16LE or UTF-16BE.
-     *
-     * @param str the string to encode into bytes
-     * @param charsetName the name of a supported {@linkplain java.nio.charset.Charset charset}
-     * @return the encoded bytes
-     */
-    public static byte[] toBytes(CharSequence str, String charsetName) {
-        try {
-            return str.toString().getBytes(charsetName);
-        } catch (UnsupportedEncodingException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
     /**
      * Attempts to parse the given string as arbitrary-length hex or base58 and then return the results, or null if
      * neither parse was successful.

core/src/main/java/org/bitcoinj/wallet/DeterministicSeed.java

@@ -236,7 +236,7 @@ public class DeterministicSeed implements EncryptableItem {
     }
 
     private static List<String> decodeMnemonicCode(byte[] mnemonicCode) {
-        return decodeMnemonicCode(Utils.toString(mnemonicCode, "UTF-8"));
+        return decodeMnemonicCode(new String(mnemonicCode, Charsets.UTF_8));
     }
 
     private static List<String> decodeMnemonicCode(String mnemonicCode) {