ToStringProvider.java

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package plp.expressions1.util;

import java.util.List;

public class ToStringProvider {

        public static String listToString(List<?> list, CharSequence before,
                        CharSequence after, CharSequence separator) {
                StringBuilder sb = new StringBuilder();
                sb.append(before);

                for (Object object : list) {
                        sb.append(object.toString());
                        sb.append(separator);
                        sb.append(' ');
                }
                if (sb.length() >= 2) {
                        sb.delete(sb.length() - 1 - separator.length(), sb.length());
                }
                sb.append(after);
                return sb.toString();
        }

        public static String listToString(List<?> list, CharSequence separator) {
                return listToString(list, "", "", separator);
        }
}

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