Java Array to String toStringKeyValuePairs(Object[] keys, Object[] values, int size, StringBuilder dstOptional)

Description

Convert a pair of arrays to key-value strings in the format [key0=value0, key1=value1, ...]

License

Open Source License

Parameter

Parameter	Description
dstOptional	the StringBuilder to store the key-value string representation in, can be null in which case a default StringBuilder is created

Declaration

public static StringBuilder toStringKeyValuePairs(Object[] keys,
        Object[] values, int size, StringBuilder dstOptional) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.List;

public class Main {
    /** Convert a pair of arrays to key-value strings in the format {@code [key0=value0, key1=value1, ...]}
     * @param dstOptional the {@link StringBuilder} to store the key-value string representation in, can be null in which case a default StringBuilder is created
     *//*from  www. jav  a  2 s .co m*/
    public static StringBuilder toStringKeyValuePairs(Object[] keys,
            Object[] values, int size, StringBuilder dstOptional) {
        StringBuilder sb = dstOptional != null ? dstOptional
                : new StringBuilder(size > 50 ? 512 : size * 8);
        sb.append('[');
        if (size > 0) {
            int sizeTemp = size - 1;
            for (int i = 0; i < sizeTemp; i++) {
                sb.append(keys[i]);
                sb.append('=');
                sb.append(values[i]);
                sb.append(", ");
            }
            sb.append(keys[sizeTemp]);
            sb.append('=');
            sb.append(values[sizeTemp]);
        }
        sb.append(']');

        return sb;
    }

    public static StringBuilder toStringKeyValuePairs(Object[] keys,
            int keysOff, Object[] values, int valuesOff, int len,
            StringBuilder dstOptional) {
        StringBuilder sb = dstOptional != null ? dstOptional
                : new StringBuilder(len > 50 ? 512 : len * 8);
        sb.append('[');
        if (len > 0) {
            int count = len - 1;
            int keyOff = keysOff;
            int valOff = valuesOff;
            for (int i = 0; i < count; i++) {
                sb.append(keys[keyOff + i]);
                sb.append('=');
                sb.append(values[valOff + i]);
                sb.append(", ");
            }
            sb.append(keys[keyOff + count]);
            sb.append('=');
            sb.append(values[valOff + count]);
        }
        sb.append(']');

        return sb;
    }

    /** Convert a pair of lists to key-value strings in the format {@code [key0=value0, key1=value1, ...]}
     * @param dstOptional the {@link StringBuilder} to store the key-value string representation in, can be null in which case a default StringBuilder is created
     */
    public static <K, V> StringBuilder toStringKeyValuePairs(
            List<? extends K> keys, List<? extends V> values, int size,
            StringBuilder dstOptional) {
        StringBuilder sb = dstOptional != null ? dstOptional
                : new StringBuilder(size > 50 ? 512 : size * 8);
        sb.append('[');
        if (size > 0) {
            int sizeTemp = size - 1;
            for (int i = 0; i < sizeTemp; i++) {
                sb.append(keys.get(i));
                sb.append('=');
                sb.append(values.get(i));
                sb.append(", ");
            }
            sb.append(keys.get(sizeTemp));
            sb.append('=');
            sb.append(values.get(sizeTemp));
        }
        sb.append(']');

        return sb;
    }
}

Related

1. toStringArray(Collection strings)
2. toStringArray(Dictionary props, String key, String[] defaultArray)
3. toStringArray(final E[] array)
4. toStringArray(int[] nums)
5. toStringArray(Object value)
6. toStrings(byte[] bytes)