join various kinds of data structure to string - Android java.lang

Android examples for java.lang:String Join

  1. HOME
  2. Android
  3. java.lang
  4. String Join

Description

join various kinds of data structure to string

Demo Code

import android.text.TextUtils;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class Main{

    public static String join(Object[] array, String separator) {
        if (null == array) {
            return null;
        }/*from  www .  jav a  2 s  . co  m*/

        return join(array, separator, 0, array.length - 1);
    }
    public static String join(Object[] array, String separator,
            int startIndex, int endIndex) {
        if (array == null) {
            return null;
        }

        int noOfItems = endIndex - startIndex;
        if (noOfItems <= 0) {
            return "";
        }

        StringBuilder buf = new StringBuilder(noOfItems * 16);

        for (int i = startIndex; i < endIndex; i++) {
            if (i > startIndex) {
                buf.append(separator);
            }
            if (array[i] != null) {
                buf.append(array[i]);
            }
        }
        return buf.toString();
    }
    public static String join(Iterator<?> iterator, String separator) {
        if (iterator == null) {
            return null;
        }
        if (!iterator.hasNext()) {
            return "";
        }
        Object first = iterator.next();
        if (!iterator.hasNext()) {
            return first == null ? "" : first.toString();
        }

        StringBuilder buf = new StringBuilder(256);
        if (first != null) {
            buf.append(first);
        }

        while (iterator.hasNext()) {
            if (separator != null) {
                buf.append(separator);
            }
            Object obj = iterator.next();
            if (obj != null) {
                buf.append(obj);
            }
        }
        return buf.toString();
    }

}

Related Tutorials