gistfile1.java

/*
 * join function for Java
 * 
 * example
 * List<String> list = new ArrayList<String>();
 * list.add("hogehoge");
 * list.add("fugafuga");
 * list.add("piyopiyo");
 * join(list,"&");// hogehoge&fugafuga&piyopiyo
 * 
 * String[] array = {"foo", "buzz", "bar"};
 * join(array,"&");// foo&buzz&bar
 */
public static String join(List<String> list,String delimiter){
	delimiter = delimiter != null ? delimiter : "";
	String[] array = list.toArray(new String[list.size()]);
	return join(array,delimiter);
}

public static String join(String[] array, String delimiter) {
	StringBuilder temp = new StringBuilder();
	for(int i = 0; i < array.length; i++){
		temp.append(array[i]);
		if(i < array.length - 1){
			temp.append(delimiter);
		}
	}
	return temp.toString();
}