StringUtils.java Source code

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Here is the source code for StringUtils.java

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/*
 * @(#)$Id: StringUtils.java 3619 2008-03-26 07:23:03Z yui $
 *
 * Copyright 2006-2008 Makoto YUI
 *
 * 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.
 * 
 * Contributors:
 *     Makoto YUI - initial implementation
 */
//package xbird.util.string;

/**
 * 
 * <DIV lang="en"></DIV>
 * <DIV lang="ja"></DIV>
 * 
 * @author Makoto YUI (yuin405+xbird@gmail.com)
 */
public final class StringUtils {

    public static String toBitString(final double d) {
        final char[] bit = new char[64];
        final long dd = Double.doubleToLongBits(d);
        long mask = 1L;
        for (int i = 0; i < 64; i++) {
            final long bitval = dd & mask;
            if (bitval == 0) {
                bit[63 - i] = '0';
            } else {
                bit[63 - i] = '1';
            }
            mask <<= 1;
        }
        return String.valueOf(bit);
    }

    public static String toBitString(final float f) {
        final char[] bit = new char[32];
        final int ff = Float.floatToIntBits(f);
        int mask = 1;
        for (int i = 0; i < 32; i++) {
            final int bitval = ff & mask;
            if (bitval == 0) {
                bit[31 - i] = '0';
            } else {
                bit[31 - i] = '1';
            }
            mask <<= 1;
        }
        return String.valueOf(bit);
    }

    public static String toBitString(final long n) {
        final char[] bit = new char[64];
        long mask = 1L;
        for (int i = 0; i < 64; i++) {
            final long bitval = n & mask;
            if (bitval == 0) {
                bit[63 - i] = '0';
            } else {
                bit[63 - i] = '1';
            }
            mask <<= 1;
        }
        return String.valueOf(bit);
    }

    public static String toBitString(final int n) {
        final char[] bit = new char[32];
        int mask = 1;
        for (int i = 0; i < 32; i++) {
            final int bitval = n & mask;
            if (bitval == 0) {
                bit[31 - i] = '0';
            } else {
                bit[31 - i] = '1';
            }
            mask <<= 1;
        }
        return String.valueOf(bit);
    }

    public static String toBitString(final byte[] b) {
        final char[] bits = new char[8 * b.length];
        for (int i = 0; i < b.length; i++) {
            final byte byteval = b[i];
            int bytei = i << 3;
            int mask = 0x1;
            for (int j = 7; j >= 0; j--) {
                final int bitval = byteval & mask;
                if (bitval == 0) {
                    bits[bytei + j] = '0';
                } else {
                    bits[bytei + j] = '1';
                }
                mask <<= 1;
            }
        }
        return String.valueOf(bits);
    }
}