Java String Abbreviate abbreviate(String src, int maxlen, String replacement)

Description

abbreviate

License

Open Source License

Declaration

public static String abbreviate(String src, int maxlen, String replacement) 

Method Source Code

//package com.java2s;
/**//www .  ja v  a  2  s.  c om
 * Tencent is pleased to support the open source community by making Tars available.
 *
 * Copyright (C) 2016 THL A29 Limited, a Tencent company. All rights reserved.
 *
 * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * https://opensource.org/licenses/BSD-3-Clause
 *
 * 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 String abbreviate(String src, int maxlen, String replacement) {

        if (src == null)
            return "";

        if (replacement == null) {
            replacement = "";
        }

        StringBuffer dest = new StringBuffer();

        try {
            maxlen = maxlen - computeDisplayLen(replacement);

            if (maxlen < 0) {
                return src;
            }

            int i = 0;
            for (; i < src.length() && maxlen > 0; ++i) {
                char c = src.charAt(i);
                if (c >= '\u0000' && c <= '\u00FF') {
                    maxlen = maxlen - 1;
                } else {
                    maxlen = maxlen - 2;
                }
                if (maxlen >= 0) {
                    dest.append(c);
                }
            }

            if (i < src.length() - 1) {
                dest.append(replacement);
            }
            return dest.toString();
        } catch (Throwable e) {
        }
        return src;
    }

    public static String abbreviate(String src, int maxlen) {
        return abbreviate(src, maxlen, "");
    }

    public static int computeDisplayLen(String s) {
        int len = 0;
        if (s == null) {
            return len;
        }

        for (int i = 0; i < s.length(); ++i) {
            char c = s.charAt(i);
            if (c >= '\u0000' && c <= '\u00FF') {
                len = len + 1;
            } else {
                len = len + 2;
            }
        }
        return len;
    }
}

Related

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4. abbreviate(String s, int max)
5. abbreviate(String s, int maxLength)
6. abbreviate(String str)
7. abbreviate(String str, int maximumChars)
8. abbreviate(String str, int maxlen, String appendIfLimit)
9. abbreviate(String str, int maxWidth)