Java Bits Convert to bitString2byte(String str)

Description

bit Stringbyte

License

Apache License

Declaration

public static byte bitString2byte(String str) 

Method Source Code

//package com.java2s;
/**//from w  w w  .j  a v a  2 s  .  c  om
 * Copyright (C) 2010 Peter Karich <jetwick_@_pannous_._info>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class Main {
    public static byte bitString2byte(String str) {
        int res = 0;

        if (str.length() > 8)
            throw new UnsupportedOperationException(
                    "string length may be max 8");

        for (int i = 0; i < str.length(); i++) {
            res = res << 1;

            if ('1' == str.charAt(i)) {
                res |= 1;
            } else if ('0' == str.charAt(i)) {
            } else
                throw new UnsupportedOperationException(
                        "string may contain only 1 or 0");
        }

        return (byte) res;
    }
}

Related

1. bitsToFloats(boolean[] b)
2. bitsToTransform(int src, int target)
3. bitStr(long value)
4. bitString(boolean value)
5. bitString(byte b)
6. bitStringToInt(String bits, char one)
7. bitsUsed(long value)
8. bitTest(String value, int pos)
9. bitToBoolean(byte b)