Java Array Join joinByComma(String[] values)

Description

join By Comma

License

Apache License

Declaration

public static String joinByComma(String[] values) 

Method Source Code

//package com.java2s;
/*//  w  w  w .  ja  v a 2s . com
 * Copyright 2011-2013 HTTL Team.
 *  
 * 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.
 */

import java.util.Arrays;

public class Main {
    public static String joinByComma(String[] values) {
        return joinBy(values, ",");
    }

    public static String joinBy(String[] values, String sep) {
        StringBuilder buf = new StringBuilder();
        for (String value : values) {
            if (buf.length() > 0) {
                buf.append(sep);
            }
            buf.append(value);
        }
        return buf.toString();
    }

    public static String toString(Object value) {
        if (value == null)
            return null;
        if (value.getClass().isArray()) {
            if (value instanceof boolean[]) {
                return Arrays.toString((boolean[]) value);
            } else if (value instanceof byte[]) {
                return Arrays.toString((byte[]) value);
            } else if (value instanceof short[]) {
                return Arrays.toString((short[]) value);
            } else if (value instanceof int[]) {
                return Arrays.toString((int[]) value);
            } else if (value instanceof long[]) {
                return Arrays.toString((long[]) value);
            } else if (value instanceof float[]) {
                return Arrays.toString((float[]) value);
            } else if (value instanceof double[]) {
                return Arrays.toString((double[]) value);
            } else if (value instanceof char[]) {
                return String.valueOf((char[]) value);
            } else if (value instanceof Object[]) {
                return Arrays.toString((Object[]) value);
            }
        }
        return String.valueOf(value);
    }

    public static String valueOf(Object value) {
        if (value == null)
            return "";
        return toString(value);
    }
}

Related

1. join(T[] array1, T[] array2)
2. join(T[] first, T[] second)
3. join(T[] objs, String splitString)
4. joinArrays(T[] a, T[] b)
5. joinAttributes(final String[] atts1, final String[] atts2)
6. joinByteArrays(final byte[] array1, byte[] array2)
7. joinBytesArrays(byte[]... args)
8. joiner(int[] ints, String split)
9. joinParetos(double[][] pareto1, double[][] pareto2)